1. 05 Jul, 2017 29 commits
    • Kees Cook's avatar
      sysctl: enable strict writes · 2449a71e
      Kees Cook authored
      commit 41662f5c upstream.
      
      SYSCTL_WRITES_WARN was added in commit f4aacea2 ("sysctl: allow for
      strict write position handling"), and released in v3.16 in August of
      2014.  Since then I can find only 1 instance of non-zero offset
      writing[1], and it was fixed immediately in CRIU[2].  As such, it
      appears safe to flip this to the strict state now.
      
      [1] https://www.google.com/search?q="when%20file%20position%20was%20not%200"
      [2] http://lists.openvz.org/pipermail/criu/2015-April/019819.htmlSigned-off-by: default avatarKees Cook <keescook@chromium.org>
      Cc: "Eric W. Biederman" <ebiederm@xmission.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      Cc: Sumit Semwal <sumit.semwal@linaro.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      2449a71e
    • Baolin Wang's avatar
      usb: gadget: f_fs: Fix possibe deadlock · 1e0f2161
      Baolin Wang authored
      commit b3ce3ce0 upstream.
      
      When system try to close /dev/usb-ffs/adb/ep0 on one core, at the same
      time another core try to attach new UDC, which will cause deadlock as
      below scenario. Thus we should release ffs lock before issuing
      unregister_gadget_item().
      
      [   52.642225] c1 ======================================================
      [   52.642228] c1 [ INFO: possible circular locking dependency detected ]
      [   52.642236] c1 4.4.6+ #1 Tainted: G        W  O
      [   52.642241] c1 -------------------------------------------------------
      [   52.642245] c1 usb ffs open/2808 is trying to acquire lock:
      [   52.642270] c0  (udc_lock){+.+.+.}, at: [<ffffffc00065aeec>]
      		usb_gadget_unregister_driver+0x3c/0xc8
      [   52.642272] c1  but task is already holding lock:
      [   52.642283] c0  (ffs_lock){+.+.+.}, at: [<ffffffc00066b244>]
      		ffs_data_clear+0x30/0x140
      [   52.642285] c1 which lock already depends on the new lock.
      [   52.642287] c1
                     the existing dependency chain (in reverse order) is:
      [   52.642295] c0
      	       -> #1 (ffs_lock){+.+.+.}:
      [   52.642307] c0        [<ffffffc00012340c>] __lock_acquire+0x20f0/0x2238
      [   52.642314] c0        [<ffffffc000123b54>] lock_acquire+0xe4/0x298
      [   52.642322] c0        [<ffffffc000aaf6e8>] mutex_lock_nested+0x7c/0x3cc
      [   52.642328] c0        [<ffffffc00066f7bc>] ffs_func_bind+0x504/0x6e8
      [   52.642334] c0        [<ffffffc000654004>] usb_add_function+0x84/0x184
      [   52.642340] c0        [<ffffffc000658ca4>] configfs_composite_bind+0x264/0x39c
      [   52.642346] c0        [<ffffffc00065b348>] udc_bind_to_driver+0x58/0x11c
      [   52.642352] c0        [<ffffffc00065b49c>] usb_udc_attach_driver+0x90/0xc8
      [   52.642358] c0        [<ffffffc0006598e0>] gadget_dev_desc_UDC_store+0xd4/0x128
      [   52.642369] c0        [<ffffffc0002c14e8>] configfs_write_file+0xd0/0x13c
      [   52.642376] c0        [<ffffffc00023c054>] vfs_write+0xb8/0x214
      [   52.642381] c0        [<ffffffc00023cad4>] SyS_write+0x54/0xb0
      [   52.642388] c0        [<ffffffc000085ff0>] el0_svc_naked+0x24/0x28
      [   52.642395] c0
                    -> #0 (udc_lock){+.+.+.}:
      [   52.642401] c0        [<ffffffc00011e3d0>] print_circular_bug+0x84/0x2e4
      [   52.642407] c0        [<ffffffc000123454>] __lock_acquire+0x2138/0x2238
      [   52.642412] c0        [<ffffffc000123b54>] lock_acquire+0xe4/0x298
      [   52.642420] c0        [<ffffffc000aaf6e8>] mutex_lock_nested+0x7c/0x3cc
      [   52.642427] c0        [<ffffffc00065aeec>] usb_gadget_unregister_driver+0x3c/0xc8
      [   52.642432] c0        [<ffffffc00065995c>] unregister_gadget_item+0x28/0x44
      [   52.642439] c0        [<ffffffc00066b34c>] ffs_data_clear+0x138/0x140
      [   52.642444] c0        [<ffffffc00066b374>] ffs_data_reset+0x20/0x6c
      [   52.642450] c0        [<ffffffc00066efd0>] ffs_data_closed+0xac/0x12c
      [   52.642454] c0        [<ffffffc00066f070>] ffs_ep0_release+0x20/0x2c
      [   52.642460] c0        [<ffffffc00023dbe4>] __fput+0xb0/0x1f4
      [   52.642466] c0        [<ffffffc00023dd9c>] ____fput+0x20/0x2c
      [   52.642473] c0        [<ffffffc0000ee944>] task_work_run+0xb4/0xe8
      [   52.642482] c0        [<ffffffc0000cd45c>] do_exit+0x360/0xb9c
      [   52.642487] c0        [<ffffffc0000cf228>] do_group_exit+0x4c/0xb0
      [   52.642494] c0        [<ffffffc0000dd3c8>] get_signal+0x380/0x89c
      [   52.642501] c0        [<ffffffc00008a8f0>] do_signal+0x154/0x518
      [   52.642507] c0        [<ffffffc00008af00>] do_notify_resume+0x70/0x78
      [   52.642512] c0        [<ffffffc000085ee8>] work_pending+0x1c/0x20
      [   52.642514] c1
                    other info that might help us debug this:
      [   52.642517] c1  Possible unsafe locking scenario:
      [   52.642518] c1        CPU0                    CPU1
      [   52.642520] c1        ----                    ----
      [   52.642525] c0   lock(ffs_lock);
      [   52.642529] c0                                lock(udc_lock);
      [   52.642533] c0                                lock(ffs_lock);
      [   52.642537] c0   lock(udc_lock);
      [   52.642539] c1
                            *** DEADLOCK ***
      [   52.642543] c1 1 lock held by usb ffs open/2808:
      [   52.642555] c0  #0:  (ffs_lock){+.+.+.}, at: [<ffffffc00066b244>]
      		ffs_data_clear+0x30/0x140
      [   52.642557] c1 stack backtrace:
      [   52.642563] c1 CPU: 1 PID: 2808 Comm: usb ffs open Tainted: G
      [   52.642565] c1 Hardware name: Spreadtrum SP9860g Board (DT)
      [   52.642568] c1 Call trace:
      [   52.642573] c1 [<ffffffc00008b430>] dump_backtrace+0x0/0x170
      [   52.642577] c1 [<ffffffc00008b5c0>] show_stack+0x20/0x28
      [   52.642583] c1 [<ffffffc000422694>] dump_stack+0xa8/0xe0
      [   52.642587] c1 [<ffffffc00011e548>] print_circular_bug+0x1fc/0x2e4
      [   52.642591] c1 [<ffffffc000123454>] __lock_acquire+0x2138/0x2238
      [   52.642595] c1 [<ffffffc000123b54>] lock_acquire+0xe4/0x298
      [   52.642599] c1 [<ffffffc000aaf6e8>] mutex_lock_nested+0x7c/0x3cc
      [   52.642604] c1 [<ffffffc00065aeec>] usb_gadget_unregister_driver+0x3c/0xc8
      [   52.642608] c1 [<ffffffc00065995c>] unregister_gadget_item+0x28/0x44
      [   52.642613] c1 [<ffffffc00066b34c>] ffs_data_clear+0x138/0x140
      [   52.642618] c1 [<ffffffc00066b374>] ffs_data_reset+0x20/0x6c
      [   52.642621] c1 [<ffffffc00066efd0>] ffs_data_closed+0xac/0x12c
      [   52.642625] c1 [<ffffffc00066f070>] ffs_ep0_release+0x20/0x2c
      [   52.642629] c1 [<ffffffc00023dbe4>] __fput+0xb0/0x1f4
      [   52.642633] c1 [<ffffffc00023dd9c>] ____fput+0x20/0x2c
      [   52.642636] c1 [<ffffffc0000ee944>] task_work_run+0xb4/0xe8
      [   52.642640] c1 [<ffffffc0000cd45c>] do_exit+0x360/0xb9c
      [   52.642644] c1 [<ffffffc0000cf228>] do_group_exit+0x4c/0xb0
      [   52.642647] c1 [<ffffffc0000dd3c8>] get_signal+0x380/0x89c
      [   52.642651] c1 [<ffffffc00008a8f0>] do_signal+0x154/0x518
      [   52.642656] c1 [<ffffffc00008af00>] do_notify_resume+0x70/0x78
      [   52.642659] c1 [<ffffffc000085ee8>] work_pending+0x1c/0x20
      Acked-by: default avatarMichal Nazarewicz <mina86@mina86.com>
      Signed-off-by: default avatarBaolin Wang <baolin.wang@linaro.org>
      Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
      Cc: Jerry Zhang <zhangjerry@google.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      1e0f2161
    • Deepak Rawat's avatar
      drm/vmwgfx: Free hash table allocated by cmdbuf managed res mgr · 04686ab2
      Deepak Rawat authored
      commit 82fcee52 upstream.
      
      The hash table created during vmw_cmdbuf_res_man_create was
      never freed. This causes memory leak in context creation.
      Added the corresponding drm_ht_remove in vmw_cmdbuf_res_man_destroy.
      
      Tested for memory leak by running piglit overnight and kernel
      memory is not inflated which earlier was.
      Signed-off-by: default avatarDeepak Rawat <drawat@vmware.com>
      Reviewed-by: default avatarSinclair Yeh <syeh@vmware.com>
      Signed-off-by: default avatarThomas Hellstrom <thellstrom@vmware.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      04686ab2
    • Hui Wang's avatar
      ALSA: hda - set input_path bitmap to zero after moving it to new place · c70e2006
      Hui Wang authored
      commit a8f20fd2 upstream.
      
      Recently we met a problem, the codec has valid adcs and input pins,
      and they can form valid input paths, but the driver does not build
      valid controls for them like "Mic boost", "Capture Volume" and
      "Capture Switch".
      
      Through debugging, I found the driver needs to shrink the invalid
      adcs and input paths for this machine, so it will move the whole
      column bitmap value to the previous column, after moving it, the
      driver forgets to set the original column bitmap value to zero, as a
      result, the driver will invalidate the path whose index value is the
      original colume bitmap value. After executing this function, all
      valid input paths are invalidated by a mistake, there are no any
      valid input paths, so the driver won't build controls for them.
      
      Fixes: 3a65bcdc ("ALSA: hda - Fix inconsistent input_paths after ADC reduction")
      Signed-off-by: default avatarHui Wang <hui.wang@canonical.com>
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      c70e2006
    • Takashi Iwai's avatar
      ALSA: hda - Fix endless loop of codec configure · 11327be3
      Takashi Iwai authored
      commit d94815f9 upstream.
      
      azx_codec_configure() loops over the codecs found on the given
      controller via a linked list.  The code used to work in the past, but
      in the current version, this may lead to an endless loop when a codec
      binding returns an error.
      
      The culprit is that the snd_hda_codec_configure() unregisters the
      device upon error, and this eventually deletes the given codec object
      from the bus.  Since the list is initialized via list_del_init(), the
      next object points to the same device itself.  This behavior change
      was introduced at splitting the HD-audio code code, and forgotten to
      adapt it here.
      
      For fixing this bug, just use a *_safe() version of list iteration.
      
      Fixes: d068ebc2 ("ALSA: hda - Move some codes up to hdac_bus struct")
      Reported-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      11327be3
    • Paul Burton's avatar
      MIPS: Fix IRQ tracing & lockdep when rescheduling · db60a2ec
      Paul Burton authored
      commit d8550860 upstream.
      
      When the scheduler sets TIF_NEED_RESCHED & we call into the scheduler
      from arch/mips/kernel/entry.S we disable interrupts. This is true
      regardless of whether we reach work_resched from syscall_exit_work,
      resume_userspace or by looping after calling schedule(). Although we
      disable interrupts in these paths we don't call trace_hardirqs_off()
      before calling into C code which may acquire locks, and we therefore
      leave lockdep with an inconsistent view of whether interrupts are
      disabled or not when CONFIG_PROVE_LOCKING & CONFIG_DEBUG_LOCKDEP are
      both enabled.
      
      Without tracing this interrupt state lockdep will print warnings such
      as the following once a task returns from a syscall via
      syscall_exit_partial with TIF_NEED_RESCHED set:
      
      [   49.927678] ------------[ cut here ]------------
      [   49.934445] WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:3687 check_flags.part.41+0x1dc/0x1e8
      [   49.946031] DEBUG_LOCKS_WARN_ON(current->hardirqs_enabled)
      [   49.946355] CPU: 0 PID: 1 Comm: init Not tainted 4.10.0-00439-gc9fd5d362289-dirty #197
      [   49.963505] Stack : 0000000000000000 ffffffff81bb5d6a 0000000000000006 ffffffff801ce9c4
      [   49.974431]         0000000000000000 0000000000000000 0000000000000000 000000000000004a
      [   49.985300]         ffffffff80b7e487 ffffffff80a24498 a8000000ff160000 ffffffff80ede8b8
      [   49.996194]         0000000000000001 0000000000000000 0000000000000000 0000000077c8030c
      [   50.007063]         000000007fd8a510 ffffffff801cd45c 0000000000000000 a8000000ff127c88
      [   50.017945]         0000000000000000 ffffffff801cf928 0000000000000001 ffffffff80a24498
      [   50.028827]         0000000000000000 0000000000000001 0000000000000000 0000000000000000
      [   50.039688]         0000000000000000 a8000000ff127bd0 0000000000000000 ffffffff805509bc
      [   50.050575]         00000000140084e0 0000000000000000 0000000000000000 0000000000040a00
      [   50.061448]         0000000000000000 ffffffff8010e1b0 0000000000000000 ffffffff805509bc
      [   50.072327]         ...
      [   50.076087] Call Trace:
      [   50.079869] [<ffffffff8010e1b0>] show_stack+0x80/0xa8
      [   50.086577] [<ffffffff805509bc>] dump_stack+0x10c/0x190
      [   50.093498] [<ffffffff8015dde0>] __warn+0xf0/0x108
      [   50.099889] [<ffffffff8015de34>] warn_slowpath_fmt+0x3c/0x48
      [   50.107241] [<ffffffff801c15b4>] check_flags.part.41+0x1dc/0x1e8
      [   50.114961] [<ffffffff801c239c>] lock_is_held_type+0x8c/0xb0
      [   50.122291] [<ffffffff809461b8>] __schedule+0x8c0/0x10f8
      [   50.129221] [<ffffffff80946a60>] schedule+0x30/0x98
      [   50.135659] [<ffffffff80106278>] work_resched+0x8/0x34
      [   50.142397] ---[ end trace 0cb4f6ef5b99fe21 ]---
      [   50.148405] possible reason: unannotated irqs-off.
      [   50.154600] irq event stamp: 400463
      [   50.159566] hardirqs last  enabled at (400463): [<ffffffff8094edc8>] _raw_spin_unlock_irqrestore+0x40/0xa8
      [   50.171981] hardirqs last disabled at (400462): [<ffffffff8094eb98>] _raw_spin_lock_irqsave+0x30/0xb0
      [   50.183897] softirqs last  enabled at (400450): [<ffffffff8016580c>] __do_softirq+0x4ac/0x6a8
      [   50.195015] softirqs last disabled at (400425): [<ffffffff80165e78>] irq_exit+0x110/0x128
      
      Fix this by using the TRACE_IRQS_OFF macro to call trace_hardirqs_off()
      when CONFIG_TRACE_IRQFLAGS is enabled. This is done before invoking
      schedule() following the work_resched label because:
      
       1) Interrupts are disabled regardless of the path we take to reach
          work_resched() & schedule().
      
       2) Performing the tracing here avoids the need to do it in paths which
          disable interrupts but don't call out to C code before hitting a
          path which uses the RESTORE_SOME macro that will call
          trace_hardirqs_on() or trace_hardirqs_off() as appropriate.
      
      We call trace_hardirqs_on() using the TRACE_IRQS_ON macro before calling
      syscall_trace_leave() for similar reasons, ensuring that lockdep has a
      consistent view of state after we re-enable interrupts.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Fixes: 1da177e4 ("Linux-2.6.12-rc2")
      Cc: linux-mips@linux-mips.org
      Patchwork: https://patchwork.linux-mips.org/patch/15385/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      db60a2ec
    • Paul Burton's avatar
      MIPS: pm-cps: Drop manual cache-line alignment of ready_count · 93206654
      Paul Burton authored
      commit 161c51cc upstream.
      
      We allocate memory for a ready_count variable per-CPU, which is accessed
      via a cached non-coherent TLB mapping to perform synchronisation between
      threads within the core using LL/SC instructions. In order to ensure
      that the variable is contained within its own data cache line we
      allocate 2 lines worth of memory & align the resulting pointer to a line
      boundary. This is however unnecessary, since kmalloc is guaranteed to
      return memory which is at least cache-line aligned (see
      ARCH_DMA_MINALIGN). Stop the redundant manual alignment.
      
      Besides cleaning up the code & avoiding needless work, this has the side
      effect of avoiding an arithmetic error found by Bryan on 64 bit systems
      due to the 32 bit size of the former dlinesz. This led the ready_count
      variable to have its upper 32b cleared erroneously for MIPS64 kernels,
      causing problems when ready_count was later used on MIPS64 via cpuidle.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Fixes: 3179d37e ("MIPS: pm-cps: add PM state entry code for CPS systems")
      Reported-by: default avatarBryan O'Donoghue <bryan.odonoghue@imgtec.com>
      Reviewed-by: default avatarBryan O'Donoghue <bryan.odonoghue@imgtec.com>
      Tested-by: default avatarBryan O'Donoghue <bryan.odonoghue@imgtec.com>
      Cc: linux-mips@linux-mips.org
      Patchwork: https://patchwork.linux-mips.org/patch/15383/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      93206654
    • James Hogan's avatar
      MIPS: Avoid accidental raw backtrace · cb611ead
      James Hogan authored
      commit 85423636 upstream.
      
      Since commit 81a76d71 ("MIPS: Avoid using unwind_stack() with
      usermode") show_backtrace() invokes the raw backtracer when
      cp0_status & ST0_KSU indicates user mode to fix issues on EVA kernels
      where user and kernel address spaces overlap.
      
      However this is used by show_stack() which creates its own pt_regs on
      the stack and leaves cp0_status uninitialised in most of the code paths.
      This results in the non deterministic use of the raw back tracer
      depending on the previous stack content.
      
      show_stack() deals exclusively with kernel mode stacks anyway, so
      explicitly initialise regs.cp0_status to KSU_KERNEL (i.e. 0) to ensure
      we get a useful backtrace.
      
      Fixes: 81a76d71 ("MIPS: Avoid using unwind_stack() with usermode")
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: linux-mips@linux-mips.org
      Patchwork: https://patchwork.linux-mips.org/patch/16656/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      cb611ead
    • David Rientjes's avatar
      mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff() · 74de12db
      David Rientjes authored
      commit 460bcec8 upstream.
      
      We got need_resched() warnings in swap_cgroup_swapoff() because
      swap_cgroup_ctrl[type].length is particularly large.
      
      Reschedule when needed.
      
      Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1704061315270.80559@chino.kir.corp.google.comSigned-off-by: default avatarDavid Rientjes <rientjes@google.com>
      Acked-by: default avatarMichal Hocko <mhocko@suse.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
      Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      74de12db
    • Russell Currey's avatar
      drm/ast: Handle configuration without P2A bridge · a9e5044b
      Russell Currey authored
      commit 71f677a9 upstream.
      
      The ast driver configures a window to enable access into BMC
      memory space in order to read some configuration registers.
      
      If this window is disabled, which it can be from the BMC side,
      the ast driver can't function.
      
      Closing this window is a necessity for security if a machine's
      host side and BMC side are controlled by different parties;
      i.e. a cloud provider offering machines "bare metal".
      
      A recent patch went in to try to check if that window is open
      but it does so by trying to access the registers in question
      and testing if the result is 0xffffffff.
      
      This method will trigger a PCIe error when the window is closed
      which on some systems will be fatal (it will trigger an EEH
      for example on POWER which will take out the device).
      
      This patch improves this in two ways:
      
       - First, if the firmware has put properties in the device-tree
      containing the relevant configuration information, we use these.
      
       - Otherwise, a bit in one of the SCU scratch registers (which
      are readable via the VGA register space and writeable by the BMC)
      will indicate if the BMC has closed the window. This bit has been
      defined by Y.C Chen from Aspeed.
      
      If the window is closed and the configuration isn't available from
      the device-tree, some sane defaults are used. Those defaults are
      hopefully sufficient for standard video modes used on a server.
      Signed-off-by: default avatarRussell Currey <ruscur@russell.cc>
      Acked-by: default avatarJoel Stanley <joel@jms.id.au>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      a9e5044b
    • Kinglong Mee's avatar
      NFSv4: fix a reference leak caused WARNING messages · 54244271
      Kinglong Mee authored
      commit 366a1569 upstream.
      
      Because nfs4_opendata_access() has close the state when access is denied,
      so the state isn't leak.
      Rather than revert the commit a974deee, I'd like clean the strange state close.
      
      [ 1615.094218] ------------[ cut here ]------------
      [ 1615.094607] WARNING: CPU: 0 PID: 23702 at lib/list_debug.c:31 __list_add_valid+0x8e/0xa0
      [ 1615.094913] list_add double add: new=ffff9d7901d9f608, prev=ffff9d7901d9f608, next=ffff9d7901ee8dd0.
      [ 1615.095458] Modules linked in: nfsv4(E) nfs(E) nfsd(E) tun bridge stp llc fuse ip_set nfnetlink vmw_vsock_vmci_transport vsock f2fs snd_seq_midi snd_seq_midi_event fscrypto coretemp ppdev crct10dif_pclmul crc32_pclmul ghash_clmulni_intel intel_rapl_perf vmw_balloon snd_ens1371 joydev gameport snd_ac97_codec ac97_bus snd_seq snd_pcm snd_rawmidi snd_timer snd_seq_device snd soundcore nfit parport_pc parport acpi_cpufreq tpm_tis tpm_tis_core tpm i2c_piix4 vmw_vmci shpchp auth_rpcgss nfs_acl lockd(E) grace sunrpc(E) xfs libcrc32c vmwgfx drm_kms_helper ttm drm crc32c_intel mptspi e1000 serio_raw scsi_transport_spi mptscsih mptbase ata_generic pata_acpi fjes [last unloaded: nfs]
      [ 1615.097663] CPU: 0 PID: 23702 Comm: fstest Tainted: G        W   E   4.11.0-rc1+ #517
      [ 1615.098015] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
      [ 1615.098807] Call Trace:
      [ 1615.099183]  dump_stack+0x63/0x86
      [ 1615.099578]  __warn+0xcb/0xf0
      [ 1615.099967]  warn_slowpath_fmt+0x5f/0x80
      [ 1615.100370]  __list_add_valid+0x8e/0xa0
      [ 1615.100760]  nfs4_put_state_owner+0x75/0xc0 [nfsv4]
      [ 1615.101136]  __nfs4_close+0x109/0x140 [nfsv4]
      [ 1615.101524]  nfs4_close_state+0x15/0x20 [nfsv4]
      [ 1615.101949]  nfs4_close_context+0x21/0x30 [nfsv4]
      [ 1615.102691]  __put_nfs_open_context+0xb8/0x110 [nfs]
      [ 1615.103155]  put_nfs_open_context+0x10/0x20 [nfs]
      [ 1615.103586]  nfs4_file_open+0x13b/0x260 [nfsv4]
      [ 1615.103978]  do_dentry_open+0x20a/0x2f0
      [ 1615.104369]  ? nfs4_copy_file_range+0x30/0x30 [nfsv4]
      [ 1615.104739]  vfs_open+0x4c/0x70
      [ 1615.105106]  ? may_open+0x5a/0x100
      [ 1615.105469]  path_openat+0x623/0x1420
      [ 1615.105823]  do_filp_open+0x91/0x100
      [ 1615.106174]  ? __alloc_fd+0x3f/0x170
      [ 1615.106568]  do_sys_open+0x130/0x220
      [ 1615.106920]  ? __put_cred+0x3d/0x50
      [ 1615.107256]  SyS_open+0x1e/0x20
      [ 1615.107588]  entry_SYSCALL_64_fastpath+0x1a/0xa9
      [ 1615.107922] RIP: 0033:0x7fab599069b0
      [ 1615.108247] RSP: 002b:00007ffcf0600d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
      [ 1615.108575] RAX: ffffffffffffffda RBX: 00007fab59bcfae0 RCX: 00007fab599069b0
      [ 1615.108896] RDX: 0000000000000200 RSI: 0000000000000200 RDI: 00007ffcf060255e
      [ 1615.109211] RBP: 0000000000040010 R08: 0000000000000000 R09: 0000000000000016
      [ 1615.109515] R10: 00000000000006a1 R11: 0000000000000246 R12: 0000000000041000
      [ 1615.109806] R13: 0000000000040010 R14: 0000000000001000 R15: 0000000000002710
      [ 1615.110152] ---[ end trace 96ed63b1306bf2f3 ]---
      
      Fixes: a974deee ("NFSv4: Fix memory and state leak in...")
      Signed-off-by: default avatarKinglong Mee <kinglongmee@gmail.com>
      Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
      Cc: Trond Myklebust <trond.myklebust@primarydata.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      54244271
    • Eric Leblond's avatar
      netfilter: synproxy: fix conntrackd interaction · e052be55
      Eric Leblond authored
      commit 87e94dbc upstream.
      
      This patch fixes the creation of connection tracking entry from
      netlink when synproxy is used. It was missing the addition of
      the synproxy extension.
      
      This was causing kernel crashes when a conntrack entry created by
      conntrackd was used after the switch of traffic from active node
      to the passive node.
      Signed-off-by: default avatarEric Leblond <eric@regit.org>
      Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      e052be55
    • Eric Dumazet's avatar
      netfilter: xt_TCPMSS: add more sanity tests on tcph->doff · 234e6498
      Eric Dumazet authored
      commit 2638fd0f upstream.
      
      Denys provided an awesome KASAN report pointing to an use
      after free in xt_TCPMSS
      
      I have provided three patches to fix this issue, either in xt_TCPMSS or
      in xt_tcpudp.c. It seems xt_TCPMSS patch has the smallest possible
      impact.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Reported-by: default avatarDenys Fedoryshchenko <nuclearcat@nuclearcat.com>
      Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      234e6498
    • Serhey Popovych's avatar
      rtnetlink: add IFLA_GROUP to ifla_policy · 095a4112
      Serhey Popovych authored
      
      [ Upstream commit db833d40 ]
      
      Network interface groups support added while ago, however
      there is no IFLA_GROUP attribute description in policy
      and netlink message size calculations until now.
      
      Add IFLA_GROUP attribute to the policy.
      
      Fixes: cbda10fa ("net_device: add support for network device groups")
      Signed-off-by: default avatarSerhey Popovych <serhe.popovych@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      095a4112
    • Serhey Popovych's avatar
      ipv6: Do not leak throw route references · 640a09c6
      Serhey Popovych authored
      
      [ Upstream commit 07f61557 ]
      
      While commit 73ba57bf ("ipv6: fix backtracking for throw routes")
      does good job on error propagation to the fib_rules_lookup()
      in fib rules core framework that also corrects throw routes
      handling, it does not solve route reference leakage problem
      happened when we return -EAGAIN to the fib_rules_lookup()
      and leave routing table entry referenced in arg->result.
      
      If rule with matched throw route isn't last matched in the
      list we overwrite arg->result losing reference on throw
      route stored previously forever.
      
      We also partially revert commit ab997ad4 ("ipv6: fix the
      incorrect return value of throw route") since we never return
      routing table entry with dst.error == -EAGAIN when
      CONFIG_IPV6_MULTIPLE_TABLES is on. Also there is no point
      to check for RTF_REJECT flag since it is always set throw
      route.
      
      Fixes: 73ba57bf ("ipv6: fix backtracking for throw routes")
      Signed-off-by: default avatarSerhey Popovych <serhe.popovych@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      640a09c6
    • Bert Kenward's avatar
      sfc: provide dummy definitions of vswitch functions · 9de17701
      Bert Kenward authored
      
      efx_probe_all() calls efx->type->vswitching_probe during probe. For
      SFC4000 (Falcon) NICs this function is not defined, leading to a BUG
      with the top of the call stack similar to:
        ? efx_pci_probe_main+0x29a/0x830
        efx_pci_probe+0x7d3/0xe70
      
      vswitching_restore and vswitching_remove also need to be defined.
      
      Fixed in mainline by:
      commit 5a6681e2 ("sfc: separate out SFC4000 ("Falcon") support into new sfc-falcon driver")
      
      Fixes: 6d8aaaf6 ("sfc: create VEB vswitch and vport above default firmware setup")
      Signed-off-by: default avatarBert Kenward <bkenward@solarflare.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      9de17701
    • Gao Feng's avatar
      net: 8021q: Fix one possible panic caused by BUG_ON in free_netdev · 1f8bb605
      Gao Feng authored
      
      [ Upstream commit 9745e362 ]
      
      The register_vlan_device would invoke free_netdev directly, when
      register_vlan_dev failed. It would trigger the BUG_ON in free_netdev
      if the dev was already registered. In this case, the netdev would be
      freed in netdev_run_todo later.
      
      So add one condition check now. Only when dev is not registered, then
      free it directly.
      
      The following is the part coredump when netdev_upper_dev_link failed
      in register_vlan_dev. I removed the lines which are too long.
      
      [  411.237457] ------------[ cut here ]------------
      [  411.237458] kernel BUG at net/core/dev.c:7998!
      [  411.237484] invalid opcode: 0000 [#1] SMP
      [  411.237705]  [last unloaded: 8021q]
      [  411.237718] CPU: 1 PID: 12845 Comm: vconfig Tainted: G            E   4.12.0-rc5+ #6
      [  411.237737] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
      [  411.237764] task: ffff9cbeb6685580 task.stack: ffffa7d2807d8000
      [  411.237782] RIP: 0010:free_netdev+0x116/0x120
      [  411.237794] RSP: 0018:ffffa7d2807dbdb0 EFLAGS: 00010297
      [  411.237808] RAX: 0000000000000002 RBX: ffff9cbeb6ba8fd8 RCX: 0000000000001878
      [  411.237826] RDX: 0000000000000001 RSI: 0000000000000282 RDI: 0000000000000000
      [  411.237844] RBP: ffffa7d2807dbdc8 R08: 0002986100029841 R09: 0002982100029801
      [  411.237861] R10: 0004000100029980 R11: 0004000100029980 R12: ffff9cbeb6ba9000
      [  411.238761] R13: ffff9cbeb6ba9060 R14: ffff9cbe60f1a000 R15: ffff9cbeb6ba9000
      [  411.239518] FS:  00007fb690d81700(0000) GS:ffff9cbebb640000(0000) knlGS:0000000000000000
      [  411.239949] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      [  411.240454] CR2: 00007f7115624000 CR3: 0000000077cdf000 CR4: 00000000003406e0
      [  411.240936] Call Trace:
      [  411.241462]  vlan_ioctl_handler+0x3f1/0x400 [8021q]
      [  411.241910]  sock_ioctl+0x18b/0x2c0
      [  411.242394]  do_vfs_ioctl+0xa1/0x5d0
      [  411.242853]  ? sock_alloc_file+0xa6/0x130
      [  411.243465]  SyS_ioctl+0x79/0x90
      [  411.243900]  entry_SYSCALL_64_fastpath+0x1e/0xa9
      [  411.244425] RIP: 0033:0x7fb69089a357
      [  411.244863] RSP: 002b:00007ffcd04e0fc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
      [  411.245445] RAX: ffffffffffffffda RBX: 00007ffcd04e2884 RCX: 00007fb69089a357
      [  411.245903] RDX: 00007ffcd04e0fd0 RSI: 0000000000008983 RDI: 0000000000000003
      [  411.246527] RBP: 00007ffcd04e0fd0 R08: 0000000000000000 R09: 1999999999999999
      [  411.246976] R10: 000000000000053f R11: 0000000000000202 R12: 0000000000000004
      [  411.247414] R13: 00007ffcd04e1128 R14: 00007ffcd04e2888 R15: 0000000000000001
      [  411.249129] RIP: free_netdev+0x116/0x120 RSP: ffffa7d2807dbdb0
      Signed-off-by: default avatarGao Feng <gfree.wind@vip.163.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      1f8bb605
    • Wei Wang's avatar
      decnet: always not take dst->__refcnt when inserting dst into hash table · f50f2e0c
      Wei Wang authored
      
      [ Upstream commit 76371d2e ]
      
      In the existing dn_route.c code, dn_route_output_slow() takes
      dst->__refcnt before calling dn_insert_route() while dn_route_input_slow()
      does not take dst->__refcnt before calling dn_insert_route().
      This makes the whole routing code very buggy.
      In dn_dst_check_expire(), dnrt_free() is called when rt expires. This
      makes the routes inserted by dn_route_output_slow() not able to be
      freed as the refcnt is not released.
      In dn_dst_gc(), dnrt_drop() is called to release rt which could
      potentially cause the dst->__refcnt to be dropped to -1.
      In dn_run_flush(), dst_free() is called to release all the dst. Again,
      it makes the dst inserted by dn_route_output_slow() not able to be
      released and also, it does not wait on the rcu and could potentially
      cause crash in the path where other users still refer to this dst.
      
      This patch makes sure both input and output path do not take
      dst->__refcnt before calling dn_insert_route() and also makes sure
      dnrt_free()/dst_free() is called when removing dst from the hash table.
      The only difference between those 2 calls is that dnrt_free() waits on
      the rcu while dst_free() does not.
      Signed-off-by: default avatarWei Wang <weiwan@google.com>
      Acked-by: default avatarMartin KaFai Lau <kafai@fb.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      f50f2e0c
    • Eli Cohen's avatar
      net/mlx5: Wait for FW readiness before initializing command interface · 93911697
      Eli Cohen authored
      
      [ Upstream commit 6c780a02 ]
      
      Before attempting to initialize the command interface we must wait till
      the fw_initializing bit is clear.
      
      If we fail to meet this condition the hardware will drop our
      configuration, specifically the descriptors page address.  This scenario
      can happen when the firmware is still executing an FLR flow and did not
      finish yet so the driver needs to wait for that to finish.
      
      Fixes: e3297246 ('net/mlx5_core: Wait for FW readiness on startup')
      Signed-off-by: default avatarEli Cohen <eli@mellanox.com>
      Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      93911697
    • Xin Long's avatar
      ipv6: fix calling in6_ifa_hold incorrectly for dad work · 0d1effe9
      Xin Long authored
      
      [ Upstream commit f8a894b2 ]
      
      Now when starting the dad work in addrconf_mod_dad_work, if the dad work
      is idle and queued, it needs to hold ifa.
      
      The problem is there's one gap in [1], during which if the pending dad work
      is removed elsewhere. It will miss to hold ifa, but the dad word is still
      idea and queue.
      
              if (!delayed_work_pending(&ifp->dad_work))
                      in6_ifa_hold(ifp);
                          <--------------[1]
              mod_delayed_work(addrconf_wq, &ifp->dad_work, delay);
      
      An use-after-free issue can be caused by this.
      
      Chen Wei found this issue when WARN_ON(!hlist_unhashed(&ifp->addr_lst)) in
      net6_ifa_finish_destroy was hit because of it.
      
      As Hannes' suggestion, this patch is to fix it by holding ifa first in
      addrconf_mod_dad_work, then calling mod_delayed_work and putting ifa if
      the dad_work is already in queue.
      
      Note that this patch did not choose to fix it with:
      
        if (!mod_delayed_work(delay))
                in6_ifa_hold(ifp);
      
      As with it, when delay == 0, dad_work would be scheduled immediately, all
      addrconf_mod_dad_work(0) callings had to be moved under ifp->lock.
      Reported-by: default avatarWei Chen <weichen@redhat.com>
      Suggested-by: default avatarHannes Frederic Sowa <hannes@stressinduktion.org>
      Acked-by: default avatarHannes Frederic Sowa <hannes@stressinduktion.org>
      Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      0d1effe9
    • WANG Cong's avatar
      igmp: add a missing spin_lock_init() · 4feb6121
      WANG Cong authored
      
      [ Upstream commit b4846fc3 ]
      
      Andrey reported a lockdep warning on non-initialized
      spinlock:
      
       INFO: trying to register non-static key.
       the code is fine but needs lockdep annotation.
       turning off the locking correctness validator.
       CPU: 1 PID: 4099 Comm: a.out Not tainted 4.12.0-rc6+ #9
       Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
       Call Trace:
        __dump_stack lib/dump_stack.c:16
        dump_stack+0x292/0x395 lib/dump_stack.c:52
        register_lock_class+0x717/0x1aa0 kernel/locking/lockdep.c:755
        ? 0xffffffffa0000000
        __lock_acquire+0x269/0x3690 kernel/locking/lockdep.c:3255
        lock_acquire+0x22d/0x560 kernel/locking/lockdep.c:3855
        __raw_spin_lock_bh ./include/linux/spinlock_api_smp.h:135
        _raw_spin_lock_bh+0x36/0x50 kernel/locking/spinlock.c:175
        spin_lock_bh ./include/linux/spinlock.h:304
        ip_mc_clear_src+0x27/0x1e0 net/ipv4/igmp.c:2076
        igmpv3_clear_delrec+0xee/0x4f0 net/ipv4/igmp.c:1194
        ip_mc_destroy_dev+0x4e/0x190 net/ipv4/igmp.c:1736
      
      We miss a spin_lock_init() in igmpv3_add_delrec(), probably
      because previously we never use it on this code path. Since
      we already unlink it from the global mc_tomb list, it is
      probably safe not to acquire this spinlock here. It does not
      harm to have it although, to avoid conditional locking.
      
      Fixes: c38b7d32 ("igmp: acquire pmc lock for ip_mc_clear_src()")
      Reported-by: default avatarAndrey Konovalov <andreyknvl@google.com>
      Signed-off-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      4feb6121
    • WANG Cong's avatar
      igmp: acquire pmc lock for ip_mc_clear_src() · ee8d5f9f
      WANG Cong authored
      
      [ Upstream commit c38b7d32 ]
      
      Andrey reported a use-after-free in add_grec():
      
              for (psf = *psf_list; psf; psf = psf_next) {
      		...
                      psf_next = psf->sf_next;
      
      where the struct ip_sf_list's were already freed by:
      
       kfree+0xe8/0x2b0 mm/slub.c:3882
       ip_mc_clear_src+0x69/0x1c0 net/ipv4/igmp.c:2078
       ip_mc_dec_group+0x19a/0x470 net/ipv4/igmp.c:1618
       ip_mc_drop_socket+0x145/0x230 net/ipv4/igmp.c:2609
       inet_release+0x4e/0x1c0 net/ipv4/af_inet.c:411
       sock_release+0x8d/0x1e0 net/socket.c:597
       sock_close+0x16/0x20 net/socket.c:1072
      
      This happens because we don't hold pmc->lock in ip_mc_clear_src()
      and a parallel mr_ifc_timer timer could jump in and access them.
      
      The RCU lock is there but it is merely for pmc itself, this
      spinlock could actually ensure we don't access them in parallel.
      
      Thanks to Eric and Long for discussion on this bug.
      Reported-by: default avatarAndrey Konovalov <andreyknvl@google.com>
      Cc: Eric Dumazet <edumazet@google.com>
      Cc: Xin Long <lucien.xin@gmail.com>
      Signed-off-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
      Reviewed-by: default avatarXin Long <lucien.xin@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      ee8d5f9f
    • Jia-Ju Bai's avatar
      net: caif: Fix a sleep-in-atomic bug in cfpkt_create_pfx · 7de53eed
      Jia-Ju Bai authored
      
      [ Upstream commit f146e872 ]
      
      The kernel may sleep under a rcu read lock in cfpkt_create_pfx, and the
      function call path is:
      cfcnfg_linkup_rsp (acquire the lock by rcu_read_lock)
        cfctrl_linkdown_req
          cfpkt_create
            cfpkt_create_pfx
              alloc_skb(GFP_KERNEL) --> may sleep
      cfserl_receive (acquire the lock by rcu_read_lock)
        cfpkt_split
          cfpkt_create_pfx
            alloc_skb(GFP_KERNEL) --> may sleep
      
      There is "in_interrupt" in cfpkt_create_pfx to decide use "GFP_KERNEL" or
      "GFP_ATOMIC". In this situation, "GFP_KERNEL" is used because the function
      is called under a rcu read lock, instead in interrupt.
      
      To fix it, only "GFP_ATOMIC" is used in cfpkt_create_pfx.
      Signed-off-by: default avatarJia-Ju Bai <baijiaju1990@163.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      7de53eed
    • Krister Johansen's avatar
      Fix an intermittent pr_emerg warning about lo becoming free. · 030a77d2
      Krister Johansen authored
      
      [ Upstream commit f186ce61 ]
      
      It looks like this:
      
      Message from syslogd@flamingo at Apr 26 00:45:00 ...
       kernel:unregister_netdevice: waiting for lo to become free. Usage count = 4
      
      They seem to coincide with net namespace teardown.
      
      The message is emitted by netdev_wait_allrefs().
      
      Forced a kdump in netdev_run_todo, but found that the refcount on the lo
      device was already 0 at the time we got to the panic.
      
      Used bcc to check the blocking in netdev_run_todo.  The only places
      where we're off cpu there are in the rcu_barrier() and msleep() calls.
      That behavior is expected.  The msleep time coincides with the amount of
      time we spend waiting for the refcount to reach zero; the rcu_barrier()
      wait times are not excessive.
      
      After looking through the list of callbacks that the netdevice notifiers
      invoke in this path, it appears that the dst_dev_event is the most
      interesting.  The dst_ifdown path places a hold on the loopback_dev as
      part of releasing the dev associated with the original dst cache entry.
      Most of our notifier callbacks are straight-forward, but this one a)
      looks complex, and b) places a hold on the network interface in
      question.
      
      I constructed a new bcc script that watches various events in the
      liftime of a dst cache entry.  Note that dst_ifdown will take a hold on
      the loopback device until the invalidated dst entry gets freed.
      
      [      __dst_free] on DST: ffff883ccabb7900 IF tap1008300eth0 invoked at 1282115677036183
          __dst_free
          rcu_nocb_kthread
          kthread
          ret_from_fork
      Acked-by: default avatarEric Dumazet <edumazet@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      030a77d2
    • Mateusz Jurczyk's avatar
      af_unix: Add sockaddr length checks before accessing sa_family in bind and connect handlers · 0fc0fad0
      Mateusz Jurczyk authored
      
      [ Upstream commit defbcf2d ]
      
      Verify that the caller-provided sockaddr structure is large enough to
      contain the sa_family field, before accessing it in bind() and connect()
      handlers of the AF_UNIX socket. Since neither syscall enforces a minimum
      size of the corresponding memory region, very short sockaddrs (zero or
      one byte long) result in operating on uninitialized memory while
      referencing .sa_family.
      Signed-off-by: default avatarMateusz Jurczyk <mjurczyk@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      0fc0fad0
    • Mintz, Yuval's avatar
      net: Zero ifla_vf_info in rtnl_fill_vfinfo() · e2c3ee00
      Mintz, Yuval authored
      
      [ Upstream commit 0eed9cf5 ]
      
      Some of the structure's fields are not initialized by the
      rtnetlink. If driver doesn't set those in ndo_get_vf_config(),
      they'd leak memory to user.
      Signed-off-by: default avatarYuval Mintz <Yuval.Mintz@cavium.com>
      CC: Michal Schmidt <mschmidt@redhat.com>
      Reviewed-by: default avatarGreg Rose <gvrose8192@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      e2c3ee00
    • Mateusz Jurczyk's avatar
      decnet: dn_rtmsg: Improve input length sanitization in dnrmg_receive_user_skb · dedb088a
      Mateusz Jurczyk authored
      
      [ Upstream commit dd0da17b ]
      
      Verify that the length of the socket buffer is sufficient to cover the
      nlmsghdr structure before accessing the nlh->nlmsg_len field for further
      input sanitization. If the client only supplies 1-3 bytes of data in
      sk_buff, then nlh->nlmsg_len remains partially uninitialized and
      contains leftover memory from the corresponding kernel allocation.
      Operating on such data may result in indeterminate evaluation of the
      nlmsg_len < sizeof(*nlh) expression.
      
      The bug was discovered by a runtime instrumentation designed to detect
      use of uninitialized memory in the kernel. The patch prevents this and
      other similar tools (e.g. KMSAN) from flagging this behavior in the future.
      Signed-off-by: default avatarMateusz Jurczyk <mjurczyk@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      dedb088a
    • Alexander Potapenko's avatar
      net: don't call strlen on non-terminated string in dev_set_alias() · e79948e2
      Alexander Potapenko authored
      
      [ Upstream commit c28294b9 ]
      
      KMSAN reported a use of uninitialized memory in dev_set_alias(),
      which was caused by calling strlcpy() (which in turn called strlen())
      on the user-supplied non-terminated string.
      Signed-off-by: default avatarAlexander Potapenko <glider@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      e79948e2
    • Willem de Bruijn's avatar
      ipv6: release dst on error in ip6_dst_lookup_tail · d68a4e38
      Willem de Bruijn authored
      commit 00ea1cee upstream.
      
      If ip6_dst_lookup_tail has acquired a dst and fails the IPv4-mapped
      check, release the dst before returning an error.
      
      Fixes: ec5e3b0a ("ipv6: Inhibit IPv4-mapped src address on the wire.")
      Signed-off-by: default avatarWillem de Bruijn <willemb@google.com>
      Acked-by: default avatarEric Dumazet <edumazet@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      d68a4e38
  2. 29 Jun, 2017 11 commits
    • Greg Kroah-Hartman's avatar
      Linux 4.4.75 · 6ee496d7
      Greg Kroah-Hartman authored
      6ee496d7
    • Guilherme G. Piccoli's avatar
      nvme: apply DELAY_BEFORE_CHK_RDY quirk at probe time too · cb7be08d
      Guilherme G. Piccoli authored
      commit b5a10c5f upstream.
      
      Commit 54adc010 ("nvme/quirk: Add a delay before checking for adapter
      readiness") introduced a quirk to adapters that cannot read the bit
      NVME_CSTS_RDY right after register NVME_REG_CC is set; these adapters
      need a delay or else the action of reading the bit NVME_CSTS_RDY could
      somehow corrupt adapter's registers state and it never recovers.
      
      When this quirk was added, we checked ctrl->tagset in order to avoid
      quirking in probe time, supposing we would never require such delay
      during probe. Well, it was too optimistic; we in fact need this quirk
      at probe time in some cases, like after a kexec.
      
      In some experiments, after abnormal shutdown of machine (aka power cord
      unplug), we booted into our bootloader in Power, which is a Linux kernel,
      and kexec'ed into another distro. If this kexec is too quick, we end up
      reaching the probe of NVMe adapter in that distro when adapter is in
      bad state (not fully initialized on our bootloader). What happens next
      is that nvme_wait_ready() is unable to complete, except if the quirk is
      enabled.
      
      So, this patch removes the original ctrl->tagset verification in order
      to enable the quirk even on probe time.
      
      Fixes: 54adc010 ("nvme/quirk: Add a delay before checking for adapter readiness")
      Reported-by: default avatarAndrew Byrne <byrneadw@ie.ibm.com>
      Reported-by: default avatarJaime A. H. Gomez <jahgomez@mx1.ibm.com>
      Reported-by: default avatarZachary D. Myers <zdmyers@us.ibm.com>
      Signed-off-by: default avatarGuilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
      Acked-by: default avatarJeffrey Lien <Jeff.Lien@wdc.com>
      Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
      [mauricfo: backport to v4.4.70 without nvme quirk handling & nvme_ctrl]
      Signed-off-by: default avatarMauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
      Tested-by: default avatarNarasimhan Vaidyanathan <vnarasimhan@in.ibm.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      cb7be08d
    • Guilherme G. Piccoli's avatar
      nvme/quirk: Add a delay before checking for adapter readiness · bddc8027
      Guilherme G. Piccoli authored
      commit 54adc010 upstream.
      
      When disabling the controller, the specification says the register
      NVME_REG_CC should be written and then driver needs to wait the
      adapter to be ready, which is checked by reading another register
      bit (NVME_CSTS_RDY). There's a timeout validation in this checking,
      so in case this timeout is reached the driver gives up and removes
      the adapter from the system.
      
      After a firmware activation procedure, the PCI_DEVICE(0x1c58, 0x0003)
      (HGST adapter) end up being removed if we issue a reset_controller,
      because driver keeps verifying the NVME_REG_CSTS until the timeout is
      reached. This patch adds a necessary quirk for this adapter, by
      introducing a delay before nvme_wait_ready(), so the reset procedure
      is able to be completed. This quirk is needed because just increasing
      the timeout is not enough in case of this adapter - the driver must
      wait before start reading NVME_REG_CSTS register on this specific
      device.
      Signed-off-by: default avatarGuilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
      Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      [mauricfo: backport to v4.4.70 without nvme quirk handling & nvme_ctrl]
      Signed-off-by: default avatarMauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
      Tested-by: default avatarNarasimhan Vaidyanathan <vnarasimhan@in.ibm.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      bddc8027
    • Russell King's avatar
      net: phy: fix marvell phy status reading · e5f87c73
      Russell King authored
      commit 898805e0 upstream.
      
      The Marvell driver incorrectly provides phydev->lp_advertising as the
      logical and of the link partner's advert and our advert.  This is
      incorrect - this field is supposed to store the link parter's unmodified
      advertisment.
      
      This allows ethtool to report the correct link partner auto-negotiation
      status.
      
      Fixes: be937f1f ("Marvell PHY m88e1111 driver fix")
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
      Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarAmit Pundir <amit.pundir@linaro.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      e5f87c73
    • Yendapally Reddy Dhananjaya Reddy's avatar
      net: phy: Initialize mdio clock at probe function · 9b54821d
      Yendapally Reddy Dhananjaya Reddy authored
      commit bb1a6197 upstream.
      
      USB PHYs need the MDIO clock divisor enabled earlier to work.
      Initialize mdio clock divisor in probe function. The ext bus
      bit available in the same register will be used by mdio mux
      to enable external mdio.
      Signed-off-by: default avatarYendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com>
      Fixes: ddc24ae1 ("net: phy: Broadcom iProc MDIO bus driver")
      Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarJon Mason <jon.mason@broadcom.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarAmit Pundir <amit.pundir@linaro.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      9b54821d
    • William Wu's avatar
      usb: gadget: f_fs: avoid out of bounds access on comp_desc · 889caad4
      William Wu authored
      commit b7f73850 upstream.
      
      Companion descriptor is only used for SuperSpeed endpoints,
      if the endpoints are HighSpeed or FullSpeed, the Companion
      descriptor will not allocated, so we can only access it if
      gadget is SuperSpeed.
      
      I can reproduce this issue on Rockchip platform rk3368 SoC
      which supports USB 2.0, and use functionfs for ADB. Kernel
      build with CONFIG_KASAN=y and CONFIG_SLUB_DEBUG=y report
      the following BUG:
      
      ==================================================================
      BUG: KASAN: slab-out-of-bounds in ffs_func_set_alt+0x224/0x3a0 at addr ffffffc0601f6509
      Read of size 1 by task swapper/0/0
      ============================================================================
      BUG kmalloc-256 (Not tainted): kasan: bad access detected
      ----------------------------------------------------------------------------
      
      Disabling lock debugging due to kernel taint
      INFO: Allocated in ffs_func_bind+0x52c/0x99c age=1275 cpu=0 pid=1
      alloc_debug_processing+0x128/0x17c
      ___slab_alloc.constprop.58+0x50c/0x610
      __slab_alloc.isra.55.constprop.57+0x24/0x34
      __kmalloc+0xe0/0x250
      ffs_func_bind+0x52c/0x99c
      usb_add_function+0xd8/0x1d4
      configfs_composite_bind+0x48c/0x570
      udc_bind_to_driver+0x6c/0x170
      usb_udc_attach_driver+0xa4/0xd0
      gadget_dev_desc_UDC_store+0xcc/0x118
      configfs_write_file+0x1a0/0x1f8
      __vfs_write+0x64/0x174
      vfs_write+0xe4/0x200
      SyS_write+0x68/0xc8
      el0_svc_naked+0x24/0x28
      INFO: Freed in inode_doinit_with_dentry+0x3f0/0x7c4 age=1275 cpu=7 pid=247
      ...
      Call trace:
      [<ffffff900808aab4>] dump_backtrace+0x0/0x230
      [<ffffff900808acf8>] show_stack+0x14/0x1c
      [<ffffff90084ad420>] dump_stack+0xa0/0xc8
      [<ffffff90082157cc>] print_trailer+0x188/0x198
      [<ffffff9008215948>] object_err+0x3c/0x4c
      [<ffffff900821b5ac>] kasan_report+0x324/0x4dc
      [<ffffff900821aa38>] __asan_load1+0x24/0x50
      [<ffffff90089eb750>] ffs_func_set_alt+0x224/0x3a0
      [<ffffff90089d3760>] composite_setup+0xdcc/0x1ac8
      [<ffffff90089d7394>] android_setup+0x124/0x1a0
      [<ffffff90089acd18>] _setup+0x54/0x74
      [<ffffff90089b6b98>] handle_ep0+0x3288/0x4390
      [<ffffff90089b9b44>] dwc_otg_pcd_handle_out_ep_intr+0x14dc/0x2ae4
      [<ffffff90089be85c>] dwc_otg_pcd_handle_intr+0x1ec/0x298
      [<ffffff90089ad680>] dwc_otg_pcd_irq+0x10/0x20
      [<ffffff9008116328>] handle_irq_event_percpu+0x124/0x3ac
      [<ffffff9008116610>] handle_irq_event+0x60/0xa0
      [<ffffff900811af30>] handle_fasteoi_irq+0x10c/0x1d4
      [<ffffff9008115568>] generic_handle_irq+0x30/0x40
      [<ffffff90081159b4>] __handle_domain_irq+0xac/0xdc
      [<ffffff9008080e9c>] gic_handle_irq+0x64/0xa4
      ...
      Memory state around the buggy address:
        ffffffc0601f6400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        ffffffc0601f6480: 00 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc
       >ffffffc0601f6500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                             ^
        ffffffc0601f6580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
        ffffffc0601f6600: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
      ==================================================================
      Signed-off-by: default avatarWilliam Wu <william.wu@rock-chips.com>
      Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
      Cc: Jerry Zhang <zhangjerry@google.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      889caad4
    • Michael Ellerman's avatar
      powerpc/slb: Force a full SLB flush when we insert for a bad EA · db7130d6
      Michael Ellerman authored
      [Note this patch is not upstream. The bug fix was fixed differently in
      upstream prior to the bug being identified.]
      
      The SLB miss handler calls slb_allocate_realmode() in order to create an
      SLB entry for the faulting address. At the very start of that function
      we check that the faulting Effective Address (EA) is less than
      PGTABLE_RANGE (ignoring the region), ie. is it an address which could
      possibly fit in the virtual address space.
      
      For an EA which fails that test, we branch out of line (to label 8), but
      we still go on to create an SLB entry for the address. The SLB entry we
      create has a VSID of 0, which means it will never match anything in the
      hash table and so can't actually translate to a physical address.
      
      However that SLB entry will be inserted in the SLB, and so needs to be
      managed properly like any other SLB entry. In particular we need to
      insert the SLB entry in the SLB cache, so that it will be flushed when
      the process is descheduled.
      
      And that is where the bugs begin. The first bug is that slb_finish_load()
      uses cr7 to decide if it should insert the SLB entry into the SLB cache.
      When we come from the invalid EA case we don't set cr7, it just has some
      junk value from userspace. So we may or may not insert the SLB entry in
      the SLB cache. If we fail to insert it, we may then incorrectly leave it
      in the SLB when the process is descheduled.
      
      The second bug is that even if we do happen to add the entry to the SLB
      cache, we do not have enough bits in the SLB cache to remember the full
      ESID value for very large EAs.
      
      For example if a process branches to 0x788c545a18000000, that results in
      a 256MB SLB entry with an ESID of 0x788c545a1. But each entry in the SLB
      cache is only 32-bits, meaning we truncate the ESID to 0x88c545a1. This
      has the same effect as the first bug, we incorrectly leave the SLB entry
      in the SLB when the process is descheduled.
      
      When a process accesses an invalid EA it results in a SEGV signal being
      sent to the process, which typically results in the process being
      killed. Process death isn't instantaneous however, the process may catch
      the SEGV signal and continue somehow, or the kernel may start writing a
      core dump for the process, either of which means it's possible for the
      process to be preempted while its processing the SEGV but before it's
      been killed.
      
      If that happens, when the process is scheduled back onto the CPU we will
      allocate a new SLB entry for the NIP, which will insert a second entry
      into the SLB for the bad EA. Because we never flushed the original
      entry, due to either bug one or two, we now have two SLB entries that
      match the same EA.
      
      If another access is made to that EA, either by the process continuing
      after catching the SEGV, or by a second process accessing the same bad
      EA on the same CPU, we will trigger an SLB multi-hit machine check
      exception. This has been observed happening in the wild.
      
      The fix is when we hit the invalid EA case, we mark the SLB cache as
      being full. This causes us to not insert the truncated ESID into the SLB
      cache, and means when the process is switched out we will flush the
      entire SLB. Note that this works both for the original fault and for a
      subsequent call to slb_allocate_realmode() from switch_slb().
      
      Because we mark the SLB cache as full, it doesn't really matter what
      value is in cr7, but rather than leaving it as something random we set
      it to indicate the address was a kernel address. That also skips the
      attempt to insert it in the SLB cache which is a nice side effect.
      
      Another way to fix the bug would be to make the entries in the SLB cache
      wider, so that we don't truncate the ESID. However this would be a more
      intrusive change as it alters the size and layout of the paca.
      
      This bug was fixed in upstream by commit f0f558b1 ("powerpc/mm:
      Preserve CFAR value on SLB miss caused by access to bogus address"),
      which changed the way we handle a bad EA entirely removing this bug in
      the process.
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Reviewed-by: default avatarPaul Mackerras <paulus@ozlabs.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      db7130d6
    • Joël Esponde's avatar
      mtd: spi-nor: fix spansion quad enable · 8fcb215c
      Joël Esponde authored
      commit 807c1625 upstream.
      
      With the S25FL127S nor flash part, each writing to the configuration
      register takes hundreds of ms. During that  time, no more accesses to
      the flash should be done (even reads).
      
      This commit adds a wait loop after the register writing until the flash
      finishes its work.
      
      This issue could make rootfs mounting fail when the latter was done too
      much closely to this quad enable bit setting step. And in this case, a
      driver as UBIFS may try to recover the filesystem and may broke it
      completely.
      Signed-off-by: default avatarJoël Esponde <joel.esponde@honeywell.com>
      Signed-off-by: default avatarCyrille Pitchen <cyrille.pitchen@atmel.com>
      Signed-off-by: default avatarAmit Pundir <amit.pundir@linaro.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      8fcb215c
    • Tobias Wolf's avatar
      of: Add check to of_scan_flat_dt() before accessing initial_boot_params · 7dfea167
      Tobias Wolf authored
      commit 3ec75441 upstream.
      
      An empty __dtb_start to __dtb_end section might result in
      initial_boot_params being null for arch/mips/ralink. This showed that the
      boot process hangs indefinitely in of_scan_flat_dt().
      Signed-off-by: default avatarTobias Wolf <dev-NTEO@vplace.de>
      Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
      Cc: linux-mips@linux-mips.org
      Patchwork: https://patchwork.linux-mips.org/patch/14605/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      Signed-off-by: default avatarAmit Pundir <amit.pundir@linaro.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      7dfea167
    • David Howells's avatar
      rxrpc: Fix several cases where a padded len isn't checked in ticket decode · eab38dfd
      David Howells authored
      commit 5f2f9765 upstream.
      
      This fixes CVE-2017-7482.
      
      When a kerberos 5 ticket is being decoded so that it can be loaded into an
      rxrpc-type key, there are several places in which the length of a
      variable-length field is checked to make sure that it's not going to
      overrun the available data - but the data is padded to the nearest
      four-byte boundary and the code doesn't check for this extra.  This could
      lead to the size-remaining variable wrapping and the data pointer going
      over the end of the buffer.
      
      Fix this by making the various variable-length data checks use the padded
      length.
      Reported-by: default avatar石磊 <shilei-c@360.cn>
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Reviewed-by: default avatarMarc Dionne <marc.c.dionne@auristor.com>
      Reviewed-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      eab38dfd
    • Johan Hovold's avatar
      USB: usbip: fix nonconforming hub descriptor · 800d7454
      Johan Hovold authored
      commit ec963b41 upstream.
      
      Fix up the root-hub descriptor to accommodate the variable-length
      DeviceRemovable and PortPwrCtrlMask fields, while marking all ports as
      removable (and leaving the reserved bit zero unset).
      
      Also add a build-time constraint on VHCI_HC_PORTS which must never be
      greater than USB_MAXCHILDREN (but this was only enforced through a
      KConfig constant).
      
      This specifically fixes the descriptor layout whenever VHCI_HC_PORTS is
      greater than seven (default is 8).
      
      Fixes: 04679b34 ("Staging: USB/IP: add client driver")
      Cc: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>
      Cc: Valentina Manea <valentina.manea.m@gmail.com>
      Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
      Acked-by: default avatarShuah Khan <shuahkh@osg.samsung.com>
      [ johan: backport to v4.4, which uses VHCI_NPORTS ]
      Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      800d7454