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  1. 20 Apr, 2017 17 commits
  3. 16 Apr, 2017 8 commits
  5. 15 Apr, 2017 9 commits
    • Linus Torvalds's avatar
      Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · d5ff0814
      Linus Torvalds authored 
      Pull nvdimm fixes from Dan Williams:
 "A small crop of lockdep, sleeping while atomic, and other fixes /
  band-aids in advance of the full-blown reworks targeting the next
  merge window. The largest change here is "libnvdimm: fix blk free
  space accounting" which deletes a pile of buggy code that better
  testing would have caught before merging. The next change that is
  borderline too big for a late rc is switching the device-dax locking
  from rcu to srcu, I couldn't think of a smaller way to make that fix.

  The __copy_user_nocache fix will have a full replacement in 4.12 to
  move those pmem special case considerations into the pmem driver. The
  "libnvdimm: band aid btt vs clear poison locking" commit admits that
  our error clearing support for btt went in broken, so we just disable
  it in 4.11 and -stable. A replacement / full fix is in the pipeline
  for 4.12

  Some of these would have been caught earlier had DEBUG_ATOMIC_SLEEP
  been enabled on my development station. I wonder if we should have:

      config DEBUG_ATOMIC_SLEEP
        default PROVE_LOCKING

  ...since I mistakenly thought I got both with PROVE_LOCKING=y.

  These have received a build success notification from the 0day robot,
  and some have appeared in a -next release with no reported issues"

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  x86, pmem: fix broken __copy_user_nocache cache-bypass assumptions
  device-dax: switch to srcu, fix rcu_read_lock() vs pte allocation
  libnvdimm: band aid btt vs clear poison locking
  libnvdimm: fix reconfig_mutex, mmap_sem, and jbd2_handle lockdep splat
  libnvdimm: fix blk free space accounting
  acpi, nfit, libnvdimm: fix interleave set cookie calculation (64-bit comparison)
      d5ff0814
    • Linus Torvalds's avatar
      Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · 403a39f8
      Linus Torvalds authored 
      Pull SCSI fixes from James Bottomley:
 "This is seven small fixes which are all for user visible issues that
  fortunately only occur in rare circumstances.

  The most serious is the sr one in which QEMU can cause us to read
  beyond the end of a buffer (I don't think it's exploitable, but just
  in case).

  The next is the sd capacity fix which means all non 512 byte sector
  drives greater than 2TB fail to be correctly sized.

  The rest are either in new drivers (qedf) or on error legs"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: ipr: do not set DID_PASSTHROUGH on CHECK CONDITION
  scsi: aacraid: fix PCI error recovery path
  scsi: sd: Fix capacity calculation with 32-bit sector_t
  scsi: qla2xxx: Add fix to read correct register value for ISP82xx.
  scsi: qedf: Fix crash due to unsolicited FIP VLAN response.
  scsi: sr: Sanity check returned mode data
  scsi: sd: Consider max_xfer_blocks if opt_xfer_blocks is unusable
      403a39f8
    • Linus Torvalds's avatar
      Merge branch 'parisc-4.11-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux · be84a46c
      Linus Torvalds authored 
      Pull parisc fix from Helge Deller:
 "Mikulas Patocka fixed a few bugs in our new pa_memcpy() assembler
  function, e.g. one bug made the kernel unbootable if source and
  destination address are the same"

* 'parisc-4.11-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: fix bugs in pa_memcpy
      be84a46c
    • Martin Brandenburg's avatar
      orangefs: free superblock when mount fails · 1ec1688c
      Martin Brandenburg authored 
      Otherwise lockdep says:

[ 1337.483798] ================================================
[ 1337.483999] [ BUG: lock held when returning to user space! ]
[ 1337.484252] 4.11.0-rc6 #19 Not tainted
[ 1337.484423] ------------------------------------------------
[ 1337.484626] mount/14766 is leaving the kernel with locks still held!
[ 1337.484841] 1 lock held by mount/14766:
[ 1337.485017]  #0:  (&type->s_umount_key#33/1){+.+.+.}, at: [<ffffffff8124171f>] sget_userns+0x2af/0x520

Caught by xfstests generic/413 which tried to mount with the unsupported
mount option dax.  Then xfstests generic/422 ran sync which deadlocks.
Signed-off-by: default avatarMartin Brandenburg <martin@omnibond.com>
Acked-by: default avatarMike Marshall <hubcap@omnibond.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      1ec1688c
    • Linus Torvalds's avatar
      vfs: don't do RCU lookup of empty pathnames · c0eb027e
      Linus Torvalds authored 
      Normal pathname lookup doesn't allow empty pathnames, but using
AT_EMPTY_PATH (with name_to_handle_at() or fstatat(), for example) you
can trigger an empty pathname lookup.

And not only is the RCU lookup in that case entirely unnecessary
(because we'll obviously immediately finalize the end result), it is
actively wrong.

Why? An empth path is a special case that will return the original
'dirfd' dentry - and that dentry may not actually be RCU-free'd,
resulting in a potential use-after-free if we were to initialize the
path lazily under the RCU read lock and depend on complete_walk()
finalizing the dentry.

Found by syzkaller and KASAN.
Reported-by: default avatarDmitry Vyukov <dvyukov@google.com>
Reported-by: default avatarVegard Nossum <vegard.nossum@gmail.com>
Acked-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c0eb027e
    • Mikulas Patocka's avatar
      parisc: fix bugs in pa_memcpy · 409c1b25
      Mikulas Patocka authored 
      The patch 554bfece ("parisc: Fix access
fault handling in pa_memcpy()") reimplements the pa_memcpy function.
Unfortunatelly, it makes the kernel unbootable. The crash happens in the
function ide_complete_cmd where memcpy is called with the same source
and destination address.

This patch fixes a few bugs in pa_memcpy:

* When jumping to .Lcopy_loop_16 for the first time, don't skip the
  instruction "ldi 31,t0" (this bug made the kernel unbootable)
* Use the COND macro when comparing length, so that the comparison is
  64-bit (a theoretical issue, in case the length is greater than
  0xffffffff)
* Don't use the COND macro after the "extru" instruction (the PA-RISC
  specification says that the upper 32-bits of extru result are undefined,
  although they are set to zero in practice)
* Fix exception addresses in .Lcopy16_fault and .Lcopy8_fault
* Rename .Lcopy_loop_4 to .Lcopy_loop_8 (so that it is consistent with
  .Lcopy8_fault)

Cc: <stable@vger.kernel.org> # v4.9+
Fixes: 554bfece ("parisc: Fix access fault handling in pa_memcpy()")
Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarHelge Deller <deller@gmx.de>
      409c1b25
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · 1bf4b126
      Linus Torvalds authored 
      Pull input fixes from Dmitry Torokhov:
 "Just a small update to xpad driver to recognize yet another gamepad,
  and another change making sure userio.h is exported"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: xpad - add support for Razer Wildcat gamepad
  uapi: add missing install of userio.h
      1bf4b126
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 7e703ecc
      Linus Torvalds authored 
      Pull networking fixes from David Miller:
 "Things seem to be settling down as far as networking is concerned,
  let's hope this trend continues...

   1) Add iov_iter_revert() and use it to fix the behavior of
      skb_copy_datagram_msg() et al., from Al Viro.

   2) Fix the protocol used in the synthetic SKB we cons up for the
      purposes of doing a simulated route lookup for RTM_GETROUTE
      requests. From Florian Larysch.

   3) Don't add noop_qdisc to the per-device qdisc hashes, from Cong
      Wang.

   4) Don't call netdev_change_features with the team lock held, from
      Xin Long.

   5) Revert TCP F-RTO extension to catch more spurious timeouts because
      it interacts very badly with some middle-boxes. From Yuchung
      Cheng.

   6) Fix the loss of error values in l2tp {s,g}etsockopt calls, from
      Guillaume Nault.

   7) ctnetlink uses bit positions where it should be using bit masks,
      fix from Liping Zhang.

   8) Missing RCU locking in netfilter helper code, from Gao Feng.

   9) Avoid double frees and use-after-frees in tcp_disconnect(), from
      Eric Dumazet.

  10) Don't do a changelink before we register the netdevice in
      bridging, from Ido Schimmel.

  11) Lock the ipv6 device address list properly, from Rabin Vincent"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (29 commits)
  netfilter: ipt_CLUSTERIP: Fix wrong conntrack netns refcnt usage
  netfilter: nft_hash: do not dump the auto generated seed
  drivers: net: usb: qmi_wwan: add QMI_QUIRK_SET_DTR for Telit PID 0x1201
  ipv6: Fix idev->addr_list corruption
  net: xdp: don't export dev_change_xdp_fd()
  bridge: netlink: register netdevice before executing changelink
  bridge: implement missing ndo_uninit()
  bpf: reference may_access_skb() from __bpf_prog_run()
  tcp: clear saved_syn in tcp_disconnect()
  netfilter: nf_ct_expect: use proper RCU list traversal/update APIs
  netfilter: ctnetlink: skip dumping expect when nfct_help(ct) is NULL
  netfilter: make it safer during the inet6_dev->addr_list traversal
  netfilter: ctnetlink: make it safer when checking the ct helper name
  netfilter: helper: Add the rcu lock when call __nf_conntrack_helper_find
  netfilter: ctnetlink: using bit to represent the ct event
  netfilter: xt_TCPMSS: add more sanity tests on tcph->doff
  net: tcp: Increase TCP_MIB_OUTRSTS even though fail to alloc skb
  l2tp: don't mask errors in pppol2tp_getsockopt()
  l2tp: don't mask errors in pppol2tp_setsockopt()
  tcp: restrict F-RTO to work-around broken middle-boxes
  ...
      7e703ecc
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 91174391
      Linus Torvalds authored 
      Pull x86 fixes from Thomas Gleixner:
 "A set of small fixes for x86:

   - fix locking in RDT to prevent memory leaks and freeing in use
     memory

   - prevent setting invalid values for vdso32_enabled which cause
     inconsistencies for user space resulting in application crashes.

   - plug a race in the vdso32 code between fork and sysctl which causes
     inconsistencies for user space resulting in application crashes.

   - make MPX signal delivery work in compat mode

   - make the dmesg output of traps and faults readable again"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/intel_rdt: Fix locking in rdtgroup_schemata_write()
  x86/debug: Fix the printk() debug output of signal_fault(), do_trap() and do_general_protection()
  x86/vdso: Plug race between mapping and ELF header setup
  x86/vdso: Ensure vdso32_enabled gets set to valid values only
  x86/signals: Fix lower/upper bound reporting in compat siginfo
      91174391
  7. 14 Apr, 2017 6 commits
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 07c7016d
      Linus Torvalds authored 
      Pull perf fixes from Thomas Gleixner:
 "Two small fixes for perf:

   - the move to support cross arch annotation introduced per arch
     initialization requirements, fullfill them for s/390 (Christian
     Borntraeger)

   - add the missing initialization to the LBR entries to avoid exposing
     random or stale data"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86: Avoid exposing wrong/stale data in intel_pmu_lbr_read_32()
  perf annotate s390: Fix perf annotate error -95 (4.10 regression)
      07c7016d
    • Linus Torvalds's avatar
      Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · d295917a
      Linus Torvalds authored 
      Pull irq fixes from Thomas Gleixner:
 "The irq department provides:

   - two fixes for the CPU affinity spread infrastructure to prevent
     unbalanced spreading in corner cases which leads to horrible
     performance, because interrupts are rather aggregated than spread

   - add a missing spinlock initializer in the imx-gpcv2 init code"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/irq-imx-gpcv2: Fix spinlock initialization
  irq/affinity: Fix extra vecs calculation
  irq/affinity: Fix CPU spread for unbalanced nodes
      d295917a
    • Linus Torvalds's avatar
      Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · f399ecb4
      Linus Torvalds authored 
      Pull EFI fixes from Thomas Gleixner:
 "Three fixes from EFI land:

   - prevent accessing a Graphic Output Device (GOP) which the kernel
     does not know to handle

   - prevent PCI reconfiguration to modify a BAR which covers the
     framebuffer because that's already in use through the EFI GOP
     interface

   - avoid reserving EFI runtime regions as this results in bogus memory
     mappings"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/efi: Don't try to reserve runtime regions
  efi/fb: Avoid reconfiguration of BAR that covers the framebuffer
  efi/libstub: Skip GOP with PIXEL_BLT_ONLY format
      f399ecb4
    • Linus Torvalds's avatar
      Merge branch 'for-linus-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · 4b31ac48
      Linus Torvalds authored 
      Pull btrfs fixes from Chris Mason:
 "Dave Sterba collected a few more fixes for the last rc.

  These aren't marked for stable, but I'm putting them in with a batch
  were testing/sending by hand for this release"

* 'for-linus-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: fix potential use-after-free for cloned bio
  Btrfs: fix segmentation fault when doing dio read
  Btrfs: fix invalid dereference in btrfs_retry_endio
  btrfs: drop the nossd flag when remounting with -o ssd
      4b31ac48
    • Linus Torvalds's avatar
      Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6 · 5466f4df
      Linus Torvalds authored 
      Pull more CIFS fixes from Steve French:
 "As promised, here is the remaining set of cifs/smb3 fixes for stable
  (and a fix for one regression) now that they have had additional
  review and testing"

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
  CIFS: Fix SMB3 mount without specifying a security mechanism
  CIFS: store results of cifs_reopen_file to avoid infinite wait
  CIFS: remove bad_network_name flag
  CIFS: reconnect thread reschedule itself
  CIFS: handle guest access errors to Windows shares
  CIFS: Fix null pointer deref during read resp processing
      5466f4df
    • Steven Rostedt (VMware)'s avatar
      ftrace: Fix removing of second function probe · 82cc4fc2
      Steven Rostedt (VMware) authored 
      When two function probes are added to set_ftrace_filter, and then one of
them is removed, the update to the function locations is not performed, and
the record keeping of the function states are corrupted, and causes an
ftrace_bug() to occur.

This is easily reproducable by adding two probes, removing one, and then
adding it back again.

 # cd /sys/kernel/debug/tracing
 # echo schedule:traceoff > set_ftrace_filter
 # echo do_IRQ:traceoff > set_ftrace_filter
 # echo \!do_IRQ:traceoff > /debug/tracing/set_ftrace_filter
 # echo do_IRQ:traceoff > set_ftrace_filter

Causes:
 ------------[ cut here ]------------
 WARNING: CPU: 2 PID: 1098 at kernel/trace/ftrace.c:2369 ftrace_get_addr_curr+0x143/0x220
 Modules linked in: [...]
 CPU: 2 PID: 1098 Comm: bash Not tainted 4.10.0-test+ #405
 Hardware name: Hewlett-Packard HP Compaq Pro 6300 SFF/339A, BIOS K01 v02.05 05/07/2012
 Call Trace:
  dump_stack+0x68/0x9f
  __warn+0x111/0x130
  ? trace_irq_work_interrupt+0xa0/0xa0
  warn_slowpath_null+0x1d/0x20
  ftrace_get_addr_curr+0x143/0x220
  ? __fentry__+0x10/0x10
  ftrace_replace_code+0xe3/0x4f0
  ? ftrace_int3_handler+0x90/0x90
  ? printk+0x99/0xb5
  ? 0xffffffff81000000
  ftrace_modify_all_code+0x97/0x110
  arch_ftrace_update_code+0x10/0x20
  ftrace_run_update_code+0x1c/0x60
  ftrace_run_modify_code.isra.48.constprop.62+0x8e/0xd0
  register_ftrace_function_probe+0x4b6/0x590
  ? ftrace_startup+0x310/0x310
  ? debug_lockdep_rcu_enabled.part.4+0x1a/0x30
  ? update_stack_state+0x88/0x110
  ? ftrace_regex_write.isra.43.part.44+0x1d3/0x320
  ? preempt_count_sub+0x18/0xd0
  ? mutex_lock_nested+0x104/0x800
  ? ftrace_regex_write.isra.43.part.44+0x1d3/0x320
  ? __unwind_start+0x1c0/0x1c0
  ? _mutex_lock_nest_lock+0x800/0x800
  ftrace_trace_probe_callback.isra.3+0xc0/0x130
  ? func_set_flag+0xe0/0xe0
  ? __lock_acquire+0x642/0x1790
  ? __might_fault+0x1e/0x20
  ? trace_get_user+0x398/0x470
  ? strcmp+0x35/0x60
  ftrace_trace_onoff_callback+0x48/0x70
  ftrace_regex_write.isra.43.part.44+0x251/0x320
  ? match_records+0x420/0x420
  ftrace_filter_write+0x2b/0x30
  __vfs_write+0xd7/0x330
  ? do_loop_readv_writev+0x120/0x120
  ? locks_remove_posix+0x90/0x2f0
  ? do_lock_file_wait+0x160/0x160
  ? __lock_is_held+0x93/0x100
  ? rcu_read_lock_sched_held+0x5c/0xb0
  ? preempt_count_sub+0x18/0xd0
  ? __sb_start_write+0x10a/0x230
  ? vfs_write+0x222/0x240
  vfs_write+0xef/0x240
  SyS_write+0xab/0x130
  ? SyS_read+0x130/0x130
  ? trace_hardirqs_on_caller+0x182/0x280
  ? trace_hardirqs_on_thunk+0x1a/0x1c
  entry_SYSCALL_64_fastpath+0x18/0xad
 RIP: 0033:0x7fe61c157c30
 RSP: 002b:00007ffe87890258 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
 RAX: ffffffffffffffda RBX: ffffffff8114a410 RCX: 00007fe61c157c30
 RDX: 0000000000000010 RSI: 000055814798f5e0 RDI: 0000000000000001
 RBP: ffff8800c9027f98 R08: 00007fe61c422740 R09: 00007fe61ca53700
 R10: 0000000000000073 R11: 0000000000000246 R12: 0000558147a36400
 R13: 00007ffe8788f160 R14: 0000000000000024 R15: 00007ffe8788f15c
  ? trace_hardirqs_off_caller+0xc0/0x110
 ---[ end trace 99fa09b3d9869c2c ]---
 Bad trampoline accounting at: ffffffff81cc3b00 (do_IRQ+0x0/0x150)

Cc: stable@vger.kernel.org
Fixes: 59df055f ("ftrace: trace different functions with a different tracer")
Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
      82cc4fc2
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