1. 26 Jul, 2019 40 commits
    • Damien Le Moal's avatar
      block: Fix potential overflow in blk_report_zones() · c1bbef41
      Damien Le Moal authored
      commit 113ab72e upstream.
      
      For large values of the number of zones reported and/or large zone
      sizes, the sector increment calculated with
      
      blk_queue_zone_sectors(q) * n
      
      in blk_report_zones() loop can overflow the unsigned int type used for
      the calculation as both "n" and blk_queue_zone_sectors() value are
      unsigned int. E.g. for a device with 256 MB zones (524288 sectors),
      overflow happens with 8192 or more zones reported.
      
      Changing the return type of blk_queue_zone_sectors() to sector_t, fixes
      this problem and avoids overflow problem for all other callers of this
      helper too. The same change is also applied to the bdev_zone_sectors()
      helper.
      
      Fixes: e76239a3 ("block: add a report_zones method")
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarDamien Le Moal <damien.lemoal@wdc.com>
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      c1bbef41
    • Damien Le Moal's avatar
      block: Allow mapping of vmalloc-ed buffers · 397918f6
      Damien Le Moal authored
      commit b4c5875d upstream.
      
      To allow the SCSI subsystem scsi_execute_req() function to issue
      requests using large buffers that are better allocated with vmalloc()
      rather than kmalloc(), modify bio_map_kern() to allow passing a buffer
      allocated with vmalloc().
      
      To do so, detect vmalloc-ed buffers using is_vmalloc_addr(). For
      vmalloc-ed buffers, flush the buffer using flush_kernel_vmap_range(),
      use vmalloc_to_page() instead of virt_to_page() to obtain the pages of
      the buffer, and invalidate the buffer addresses with
      invalidate_kernel_vmap_range() on completion of read BIOs. This last
      point is executed using the function bio_invalidate_vmalloc_pages()
      which is defined only if the architecture defines
      ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE, that is, if the architecture
      actually needs the invalidation done.
      
      Fixes: 515ce606 ("scsi: sd_zbc: Fix sd_zbc_report_zones() buffer allocation")
      Fixes: e76239a3 ("block: add a report_zones method")
      Cc: stable@vger.kernel.org
      Reviewed-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
      Signed-off-by: default avatarDamien Le Moal <damien.lemoal@wdc.com>
      Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
      Reviewed-by: default avatarChaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
      Reviewed-by: default avatarMing Lei <ming.lei@redhat.com>
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      397918f6
    • Andres Rodriguez's avatar
      drm/edid: parse CEA blocks embedded in DisplayID · 9949a900
      Andres Rodriguez authored
      commit e28ad544 upstream.
      
      DisplayID blocks allow embedding of CEA blocks. The payloads are
      identical to traditional top level CEA extension blocks, but the header
      is slightly different.
      
      This change allows the CEA parser to find a CEA block inside a DisplayID
      block. Additionally, it adds support for parsing the embedded CTA
      header. No further changes are necessary due to payload parity.
      
      This change fixes audio support for the Valve Index HMD.
      Signed-off-by: default avatarAndres Rodriguez <andresx7@gmail.com>
      Reviewed-by: default avatarDave Airlie <airlied@redhat.com>
      Cc: Jani Nikula <jani.nikula@linux.intel.com>
      Cc: <stable@vger.kernel.org> # v4.15
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20190619180901.17901-1-andresx7@gmail.comSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      9949a900
    • Kim Phillips's avatar
      perf/x86/amd/uncore: Set the thread mask for F17h L3 PMCs · e457f13e
      Kim Phillips authored
      commit 2f217d58 upstream.
      
      Fill in the L3 performance event select register ThreadMask
      bitfield, to enable per hardware thread accounting.
      Signed-off-by: default avatarKim Phillips <kim.phillips@amd.com>
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Cc: <stable@vger.kernel.org>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Gary Hook <Gary.Hook@amd.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Martin Liska <mliska@suse.cz>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Pu Wen <puwen@hygon.cn>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Vince Weaver <vincent.weaver@maine.edu>
      Link: https://lkml.kernel.org/r/20190628215906.4276-2-kim.phillips@amd.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      e457f13e
    • Kim Phillips's avatar
      perf/x86/amd/uncore: Do not set 'ThreadMask' and 'SliceMask' for non-L3 PMCs · 3e1b297e
      Kim Phillips authored
      commit 16f46411 upstream.
      
      The following commit:
      
        d7cbbe49 ("perf/x86/amd/uncore: Set ThreadMask and SliceMask for L3 Cache perf events")
      
      enables L3 PMC events for all threads and slices by writing 1's in
      'ChL3PmcCfg' (L3 PMC PERF_CTL) register fields.
      
      Those bitfields overlap with high order event select bits in the Data
      Fabric PMC control register, however.
      
      So when a user requests raw Data Fabric events (-e amd_df/event=0xYYY/),
      the two highest order bits get inadvertently set, changing the counter
      select to events that don't exist, and for which no counts are read.
      
      This patch changes the logic to write the L3 masks only when dealing
      with L3 PMC counters.
      
      AMD Family 16h and below Northbridge (NB) counters were not affected.
      Signed-off-by: default avatarKim Phillips <kim.phillips@amd.com>
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Cc: <stable@vger.kernel.org>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Gary Hook <Gary.Hook@amd.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Martin Liska <mliska@suse.cz>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Pu Wen <puwen@hygon.cn>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Vince Weaver <vincent.weaver@maine.edu>
      Fixes: d7cbbe49 ("perf/x86/amd/uncore: Set ThreadMask and SliceMask for L3 Cache perf events")
      Link: https://lkml.kernel.org/r/20190628215906.4276-1-kim.phillips@amd.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      3e1b297e
    • Kan Liang's avatar
      perf/x86/intel: Fix spurious NMI on fixed counter · f7aa77ce
      Kan Liang authored
      commit e4557c1a upstream.
      
      If a user first sample a PEBS event on a fixed counter, then sample a
      non-PEBS event on the same fixed counter on Icelake, it will trigger
      spurious NMI. For example:
      
        perf record -e 'cycles:p' -a
        perf record -e 'cycles' -a
      
      The error message for spurious NMI:
      
        [June 21 15:38] Uhhuh. NMI received for unknown reason 30 on CPU 2.
        [    +0.000000] Do you have a strange power saving mode enabled?
        [    +0.000000] Dazed and confused, but trying to continue
      
      The bug was introduced by the following commit:
      
        commit 6f55967a ("perf/x86/intel: Fix race in intel_pmu_disable_event()")
      
      The commit moves the intel_pmu_pebs_disable() after intel_pmu_disable_fixed(),
      which returns immediately.  The related bit of PEBS_ENABLE MSR will never be
      cleared for the fixed counter. Then a non-PEBS event runs on the fixed counter,
      but the bit on PEBS_ENABLE is still set, which triggers spurious NMIs.
      
      Check and disable PEBS for fixed counters after intel_pmu_disable_fixed().
      Reported-by: default avatarYi, Ammy <ammy.yi@intel.com>
      Signed-off-by: default avatarKan Liang <kan.liang@linux.intel.com>
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Acked-by: default avatarJiri Olsa <jolsa@kernel.org>
      Cc: <stable@vger.kernel.org>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Vince Weaver <vincent.weaver@maine.edu>
      Fixes: 6f55967a ("perf/x86/intel: Fix race in intel_pmu_disable_event()")
      Link: https://lkml.kernel.org/r/20190625142135.22112-1-kan.liang@linux.intel.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      f7aa77ce
    • David Rientjes's avatar
      x86/boot: Fix memory leak in default_get_smp_config() · 7a45c683
      David Rientjes authored
      commit e74bd969 upstream.
      
      When default_get_smp_config() is called with early == 1 and mpf->feature1
      is non-zero, mpf is leaked because the return path does not do
      early_memunmap().
      
      Fix this and share a common exit routine.
      
      Fixes: 5997efb9 ("x86/boot: Use memremap() to map the MPF and MPC data")
      Reported-by: default avatarCfir Cohen <cfir@google.com>
      Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: stable@vger.kernel.org
      Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1907091942570.28240@chino.kir.corp.google.comSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      7a45c683
    • Soeren Moch's avatar
      rt2x00usb: fix rx queue hang · bbe75669
      Soeren Moch authored
      commit 41a531ff upstream.
      
      Since commit ed194d13 ("usb: core: remove local_irq_save() around
       ->complete() handler") the handler rt2x00usb_interrupt_rxdone() is
      not running with interrupts disabled anymore. So this completion handler
      is not guaranteed to run completely before workqueue processing starts
      for the same queue entry.
      Be sure to set all other flags in the entry correctly before marking
      this entry ready for workqueue processing. This way we cannot miss error
      conditions that need to be signalled from the completion handler to the
      worker thread.
      Note that rt2x00usb_work_rxdone() processes all available entries, not
      only such for which queue_work() was called.
      
      This patch is similar to what commit df71c9cf ("rt2x00: fix order
      of entry flags modification") did for TX processing.
      
      This fixes a regression on a RT5370 based wifi stick in AP mode, which
      suddenly stopped data transmission after some period of heavy load. Also
      stopping the hanging hostapd resulted in the error message "ieee80211
      phy0: rt2x00queue_flush_queue: Warning - Queue 14 failed to flush".
      Other operation modes are probably affected as well, this just was
      the used testcase.
      
      Fixes: ed194d13 ("usb: core: remove local_irq_save() around ->complete() handler")
      Cc: stable@vger.kernel.org # 4.20+
      Signed-off-by: default avatarSoeren Moch <smoch@web.de>
      Acked-by: default avatarStanislaw Gruszka <sgruszka@redhat.com>
      Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      bbe75669
    • YueHaibing's avatar
      9p/virtio: Add cleanup path in p9_virtio_init · 7f235a53
      YueHaibing authored
      commit d4548543 upstream.
      
      KASAN report this:
      
      BUG: unable to handle kernel paging request at ffffffffa0097000
      PGD 3870067 P4D 3870067 PUD 3871063 PMD 2326e2067 PTE 0
      Oops: 0000 [#1
      CPU: 0 PID: 5340 Comm: modprobe Not tainted 5.1.0-rc7+ #25
      Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.3-0-ge2fc41e-prebuilt.qemu-project.org 04/01/2014
      RIP: 0010:__list_add_valid+0x10/0x70
      Code: c3 48 8b 06 55 48 89 e5 5d 48 39 07 0f 94 c0 0f b6 c0 c3 90 90 90 90 90 90 90 55 48 89 d0 48 8b 52 08 48 89 e5 48 39 f2 75 19 <48> 8b 32 48 39 f0 75 3a
      
      RSP: 0018:ffffc90000e23c68 EFLAGS: 00010246
      RAX: ffffffffa00ad000 RBX: ffffffffa009d000 RCX: 0000000000000000
      RDX: ffffffffa0097000 RSI: ffffffffa0097000 RDI: ffffffffa009d000
      RBP: ffffc90000e23c68 R08: 0000000000000001 R09: 0000000000000000
      R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffa0097000
      R13: ffff888231797180 R14: 0000000000000000 R15: ffffc90000e23e78
      FS:  00007fb215285540(0000) GS:ffff888237a00000(0000) knlGS:0000000000000000
      CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      CR2: ffffffffa0097000 CR3: 000000022f144000 CR4: 00000000000006f0
      Call Trace:
       v9fs_register_trans+0x2f/0x60 [9pnet
       ? 0xffffffffa0087000
       p9_virtio_init+0x25/0x1000 [9pnet_virtio
       do_one_initcall+0x6c/0x3cc
       ? kmem_cache_alloc_trace+0x248/0x3b0
       do_init_module+0x5b/0x1f1
       load_module+0x1db1/0x2690
       ? m_show+0x1d0/0x1d0
       __do_sys_finit_module+0xc5/0xd0
       __x64_sys_finit_module+0x15/0x20
       do_syscall_64+0x6b/0x1d0
       entry_SYSCALL_64_after_hwframe+0x49/0xbe
      RIP: 0033:0x7fb214d8e839
      Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01
      
      RSP: 002b:00007ffc96554278 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
      RAX: ffffffffffffffda RBX: 000055e67eed2aa0 RCX: 00007fb214d8e839
      RDX: 0000000000000000 RSI: 000055e67ce95c2e RDI: 0000000000000003
      RBP: 000055e67ce95c2e R08: 0000000000000000 R09: 000055e67eed2aa0
      R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
      R13: 000055e67eeda500 R14: 0000000000040000 R15: 000055e67eed2aa0
      Modules linked in: 9pnet_virtio(+) 9pnet gre rfkill vmw_vsock_virtio_transport_common vsock [last unloaded: 9pnet_virtio
      CR2: ffffffffa0097000
      ---[ end trace 4a52bb13ff07b761
      
      If register_virtio_driver() fails in p9_virtio_init,
      we should call v9fs_unregister_trans() to do cleanup.
      
      Link: http://lkml.kernel.org/r/20190430115942.41840-1-yuehaibing@huawei.com
      Cc: stable@vger.kernel.org
      Reported-by: default avatarHulk Robot <hulkci@huawei.com>
      Fixes: b530cc79 ("9p: add virtio transport")
      Signed-off-by: default avatarYueHaibing <yuehaibing@huawei.com>
      Signed-off-by: default avatarDominique Martinet <dominique.martinet@cea.fr>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      7f235a53
    • YueHaibing's avatar
      9p/xen: Add cleanup path in p9_trans_xen_init · 36acd9cc
      YueHaibing authored
      commit 80a316ff upstream.
      
      If xenbus_register_frontend() fails in p9_trans_xen_init,
      we should call v9fs_unregister_trans() to do cleanup.
      
      Link: http://lkml.kernel.org/r/20190430143933.19368-1-yuehaibing@huawei.com
      Cc: stable@vger.kernel.org
      Fixes: 868eb122 ("xen/9pfs: introduce Xen 9pfs transport driver")
      Signed-off-by: default avatarYueHaibing <yuehaibing@huawei.com>
      Signed-off-by: default avatarDominique Martinet <dominique.martinet@cea.fr>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      36acd9cc
    • Juergen Gross's avatar
      xen/events: fix binding user event channels to cpus · ccfc9d9d
      Juergen Gross authored
      commit bce5963b upstream.
      
      When binding an interdomain event channel to a vcpu via
      IOCTL_EVTCHN_BIND_INTERDOMAIN not only the event channel needs to be
      bound, but the affinity of the associated IRQi must be changed, too.
      Otherwise the IRQ and the event channel won't be moved to another vcpu
      in case the original vcpu they were bound to is going offline.
      
      Cc: <stable@vger.kernel.org> # 4.13
      Fixes: c48f64ab ("xen-evtchn: Bind dyn evtchn:qemu-dm interrupt to next online VCPU")
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      Reviewed-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      ccfc9d9d
    • Damien Le Moal's avatar
      dm zoned: fix zone state management race · 842ee766
      Damien Le Moal authored
      commit 3b8cafdd upstream.
      
      dm-zoned uses the zone flag DMZ_ACTIVE to indicate that a zone of the
      backend device is being actively read or written and so cannot be
      reclaimed. This flag is set as long as the zone atomic reference
      counter is not 0. When this atomic is decremented and reaches 0 (e.g.
      on BIO completion), the active flag is cleared and set again whenever
      the zone is reused and BIO issued with the atomic counter incremented.
      These 2 operations (atomic inc/dec and flag set/clear) are however not
      always executed atomically under the target metadata mutex lock and
      this causes the warning:
      
      WARN_ON(!test_bit(DMZ_ACTIVE, &zone->flags));
      
      in dmz_deactivate_zone() to be displayed. This problem is regularly
      triggered with xfstests generic/209, generic/300, generic/451 and
      xfs/077 with XFS being used as the file system on the dm-zoned target
      device. Similarly, xfstests ext4/303, ext4/304, generic/209 and
      generic/300 trigger the warning with ext4 use.
      
      This problem can be easily fixed by simply removing the DMZ_ACTIVE flag
      and managing the "ACTIVE" state by directly looking at the reference
      counter value. To do so, the functions dmz_activate_zone() and
      dmz_deactivate_zone() are changed to inline functions respectively
      calling atomic_inc() and atomic_dec(), while the dmz_is_active() macro
      is changed to an inline function calling atomic_read().
      
      Fixes: 3b1a94c8 ("dm zoned: drive-managed zoned block device target")
      Cc: stable@vger.kernel.org
      Reported-by: default avatarMasato Suzuki <masato.suzuki@wdc.com>
      Signed-off-by: default avatarDamien Le Moal <damien.lemoal@wdc.com>
      Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      842ee766
    • Daniel Jordan's avatar
      padata: use smp_mb in padata_reorder to avoid orphaned padata jobs · 2b335bac
      Daniel Jordan authored
      commit cf144f81 upstream.
      
      Testing padata with the tcrypt module on a 5.2 kernel...
      
          # modprobe tcrypt alg="pcrypt(rfc4106(gcm(aes)))" type=3
          # modprobe tcrypt mode=211 sec=1
      
      ...produces this splat:
      
          INFO: task modprobe:10075 blocked for more than 120 seconds.
                Not tainted 5.2.0-base+ #16
          modprobe        D    0 10075  10064 0x80004080
          Call Trace:
           ? __schedule+0x4dd/0x610
           ? ring_buffer_unlock_commit+0x23/0x100
           schedule+0x6c/0x90
           schedule_timeout+0x3b/0x320
           ? trace_buffer_unlock_commit_regs+0x4f/0x1f0
           wait_for_common+0x160/0x1a0
           ? wake_up_q+0x80/0x80
           { crypto_wait_req }             # entries in braces added by hand
           { do_one_aead_op }
           { test_aead_jiffies }
           test_aead_speed.constprop.17+0x681/0xf30 [tcrypt]
           do_test+0x4053/0x6a2b [tcrypt]
           ? 0xffffffffa00f4000
           tcrypt_mod_init+0x50/0x1000 [tcrypt]
           ...
      
      The second modprobe command never finishes because in padata_reorder,
      CPU0's load of reorder_objects is executed before the unlocking store in
      spin_unlock_bh(pd->lock), causing CPU0 to miss CPU1's increment:
      
      CPU0                                 CPU1
      
      padata_reorder                       padata_do_serial
        LOAD reorder_objects  // 0
                                             INC reorder_objects  // 1
                                             padata_reorder
                                               TRYLOCK pd->lock   // failed
        UNLOCK pd->lock
      
      CPU0 deletes the timer before returning from padata_reorder and since no
      other job is submitted to padata, modprobe waits indefinitely.
      
      Add a pair of full barriers to guarantee proper ordering:
      
      CPU0                                 CPU1
      
      padata_reorder                       padata_do_serial
        UNLOCK pd->lock
        smp_mb()
        LOAD reorder_objects
                                             INC reorder_objects
                                             smp_mb__after_atomic()
                                             padata_reorder
                                               TRYLOCK pd->lock
      
      smp_mb__after_atomic is needed so the read part of the trylock operation
      comes after the INC, as Andrea points out.   Thanks also to Andrea for
      help with writing a litmus test.
      
      Fixes: 16295bec ("padata: Generic parallelization/serialization interface")
      Signed-off-by: default avatarDaniel Jordan <daniel.m.jordan@oracle.com>
      Cc: <stable@vger.kernel.org>
      Cc: Andrea Parri <andrea.parri@amarulasolutions.com>
      Cc: Boqun Feng <boqun.feng@gmail.com>
      Cc: Herbert Xu <herbert@gondor.apana.org.au>
      Cc: Paul E. McKenney <paulmck@linux.ibm.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Steffen Klassert <steffen.klassert@secunet.com>
      Cc: linux-arch@vger.kernel.org
      Cc: linux-crypto@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      2b335bac
    • Lyude Paul's avatar
      drm/nouveau/i2c: Enable i2c pads & busses during preinit · 8e74f324
      Lyude Paul authored
      commit 7cb95eee upstream.
      
      It turns out that while disabling i2c bus access from software when the
      GPU is suspended was a step in the right direction with:
      
      commit 342406e4 ("drm/nouveau/i2c: Disable i2c bus access after
      ->fini()")
      
      We also ended up accidentally breaking the vbios init scripts on some
      older Tesla GPUs, as apparently said scripts can actually use the i2c
      bus. Since these scripts are executed before initializing any
      subdevices, we end up failing to acquire access to the i2c bus which has
      left a number of cards with their fan controllers uninitialized. Luckily
      this doesn't break hardware - it just means the fan gets stuck at 100%.
      
      This also means that we've always been using our i2c busses before
      initializing them during the init scripts for older GPUs, we just didn't
      notice it until we started preventing them from being used until init.
      It's pretty impressive this never caused us any issues before!
      
      So, fix this by initializing our i2c pad and busses during subdev
      pre-init. We skip initializing aux busses during pre-init, as those are
      guaranteed to only ever be used by nouveau for DP aux transactions.
      Signed-off-by: default avatarLyude Paul <lyude@redhat.com>
      Tested-by: default avatarMarc Meledandri <m.meledandri@gmail.com>
      Fixes: 342406e4 ("drm/nouveau/i2c: Disable i2c bus access after ->fini()")
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      8e74f324
    • Linus Walleij's avatar
      ARM: dts: gemini: Set DIR-685 SPI CS as active low · 4c64814a
      Linus Walleij authored
      commit f90b8fda upstream.
      
      The SPI to the display on the DIR-685 is active low, we were
      just saved by the SPI library enforcing active low on everything
      before, so set it as active low to avoid ambiguity.
      
      Link: https://lore.kernel.org/r/20190715202101.16060-1-linus.walleij@linaro.org
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      4c64814a
    • Masahiro Yamada's avatar
      kconfig: fix missing choice values in auto.conf · ea3f1487
      Masahiro Yamada authored
      commit 8e2442a5 upstream.
      
      Since commit 00c864f8 ("kconfig: allow all config targets to write
      auto.conf if missing"), Kconfig creates include/config/auto.conf in the
      defconfig stage when it is missing.
      
      Joonas Kylmälä reported incorrect auto.conf generation under some
      circumstances.
      
      To reproduce it, apply the following diff:
      
      |  --- a/arch/arm/configs/imx_v6_v7_defconfig
      |  +++ b/arch/arm/configs/imx_v6_v7_defconfig
      |  @@ -345,14 +345,7 @@ CONFIG_USB_CONFIGFS_F_MIDI=y
      |   CONFIG_USB_CONFIGFS_F_HID=y
      |   CONFIG_USB_CONFIGFS_F_UVC=y
      |   CONFIG_USB_CONFIGFS_F_PRINTER=y
      |  -CONFIG_USB_ZERO=m
      |  -CONFIG_USB_AUDIO=m
      |  -CONFIG_USB_ETH=m
      |  -CONFIG_USB_G_NCM=m
      |  -CONFIG_USB_GADGETFS=m
      |  -CONFIG_USB_FUNCTIONFS=m
      |  -CONFIG_USB_MASS_STORAGE=m
      |  -CONFIG_USB_G_SERIAL=m
      |  +CONFIG_USB_FUNCTIONFS=y
      |   CONFIG_MMC=y
      |   CONFIG_MMC_SDHCI=y
      |   CONFIG_MMC_SDHCI_PLTFM=y
      
      And then, run:
      
      $ make ARCH=arm mrproper imx_v6_v7_defconfig
      
      You will see CONFIG_USB_FUNCTIONFS=y is correctly contained in the
      .config, but not in the auto.conf.
      
      Please note drivers/usb/gadget/legacy/Kconfig is included from a choice
      block in drivers/usb/gadget/Kconfig. So USB_FUNCTIONFS is a choice value.
      
      This is probably a similar situation described in commit beaaddb6
      ("kconfig: tests: test defconfig when two choices interact").
      
      When sym_calc_choice() is called, the choice symbol forgets the
      SYMBOL_DEF_USER unless all of its choice values are explicitly set by
      the user.
      
      The choice symbol is given just one chance to recall it because
      set_all_choice_values() is called if SYMBOL_NEED_SET_CHOICE_VALUES
      is set.
      
      When sym_calc_choice() is called again, the choice symbol forgets it
      forever, since SYMBOL_NEED_SET_CHOICE_VALUES is a one-time aid.
      Hence, we cannot call sym_clear_all_valid() again and again.
      
      It is crazy to repeat set and unset of internal flags. However, we
      cannot simply get rid of "sym->flags &= flags | ~SYMBOL_DEF_USER;"
      Doing so would re-introduce the problem solved by commit 5d09598d
      ("kconfig: fix new choices being skipped upon config update").
      
      To work around the issue, conf_write_autoconf() stopped calling
      sym_clear_all_valid().
      
      conf_write() must be changed accordingly. Currently, it clears
      SYMBOL_WRITE after the symbol is written into the .config file. This
      is needed to prevent it from writing the same symbol multiple times in
      case the symbol is declared in two or more locations. I added the new
      flag SYMBOL_WRITTEN, to track the symbols that have been written.
      
      Anyway, this is a cheesy workaround in order to suppress the issue
      as far as defconfig is concerned.
      
      Handling of choices is totally broken. sym_clear_all_valid() is called
      every time a user touches a symbol from the GUI interface. To reproduce
      it, just add a new symbol drivers/usb/gadget/legacy/Kconfig, then touch
      around unrelated symbols from menuconfig. USB_FUNCTIONFS will disappear
      from the .config file.
      
      I added the Fixes tag since it is more fatal than before. But, this
      has been broken since long long time before, and still it is.
      We should take a closer look to fix this correctly somehow.
      
      Fixes: 00c864f8 ("kconfig: allow all config targets to write auto.conf if missing")
      Cc: linux-stable <stable@vger.kernel.org> # 4.19+
      Reported-by: default avatarJoonas Kylmälä <joonas.kylmala@iki.fi>
      Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      Tested-by: default avatarJoonas Kylmälä <joonas.kylmala@iki.fi>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      ea3f1487
    • Vitor Soares's avatar
      i3c: fix i2c and i3c scl rate by bus mode · 3620a72c
      Vitor Soares authored
      commit ecc8fb54 upstream.
      
      Currently the I3C framework limits SCL frequency to FM speed when
      dealing with a mixed slow bus, even if all I2C devices are FM+ capable.
      
      The core was also not accounting for I3C speed limitations when
      operating in mixed slow mode and was erroneously using FM+ speed as the
      max I2C speed when operating in mixed fast mode.
      
      Fixes: 3a379bbc ("i3c: Add core I3C infrastructure")
      Signed-off-by: default avatarVitor Soares <vitor.soares@synopsys.com>
      Cc: Boris Brezillon <bbrezillon@kernel.org>
      Cc: <stable@vger.kernel.org>
      Cc: <linux-kernel@vger.kernel.org>
      Signed-off-by: default avatarBoris Brezillon <boris.brezillon@collabora.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      3620a72c
    • Radoslaw Burny's avatar
      fs/proc/proc_sysctl.c: fix the default values of i_uid/i_gid on /proc/sys inodes. · 7eb45a94
      Radoslaw Burny authored
      commit 5ec27ec7 upstream.
      
      Normally, the inode's i_uid/i_gid are translated relative to s_user_ns,
      but this is not a correct behavior for proc.  Since sysctl permission
      check in test_perm is done against GLOBAL_ROOT_[UG]ID, it makes more
      sense to use these values in u_[ug]id of proc inodes.  In other words:
      although uid/gid in the inode is not read during test_perm, the inode
      logically belongs to the root of the namespace.  I have confirmed this
      with Eric Biederman at LPC and in this thread:
        https://lore.kernel.org/lkml/87k1kzjdff.fsf@xmission.com
      
      Consequences
      ============
      
      Since the i_[ug]id values of proc nodes are not used for permissions
      checks, this change usually makes no functional difference.  However, it
      causes an issue in a setup where:
      
       * a namespace container is created without root user in container -
         hence the i_[ug]id of proc nodes are set to INVALID_[UG]ID
      
       * container creator tries to configure it by writing /proc/sys files,
         e.g. writing /proc/sys/kernel/shmmax to configure shared memory limit
      
      Kernel does not allow to open an inode for writing if its i_[ug]id are
      invalid, making it impossible to write shmmax and thus - configure the
      container.
      
      Using a container with no root mapping is apparently rare, but we do use
      this configuration at Google.  Also, we use a generic tool to configure
      the container limits, and the inability to write any of them causes a
      failure.
      
      History
      =======
      
      The invalid uids/gids in inodes first appeared due to 81754357 (fs:
      Update i_[ug]id_(read|write) to translate relative to s_user_ns).
      However, AFAIK, this did not immediately cause any issues.  The
      inability to write to these "invalid" inodes was only caused by a later
      commit 0bd23d09 (vfs: Don't modify inodes with a uid or gid unknown
      to the vfs).
      
      Tested: Used a repro program that creates a user namespace without any
      mapping and stat'ed /proc/$PID/root/proc/sys/kernel/shmmax from outside.
      Before the change, it shows the overflow uid, with the change it's 0.
      The overflow uid indicates that the uid in the inode is not correct and
      thus it is not possible to open the file for writing.
      
      Link: http://lkml.kernel.org/r/20190708115130.250149-1-rburny@google.com
      Fixes: 0bd23d09 ("vfs: Don't modify inodes with a uid or gid unknown to the vfs")
      Signed-off-by: default avatarRadoslaw Burny <rburny@google.com>
      Acked-by: default avatarLuis Chamberlain <mcgrof@kernel.org>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: "Eric W . Biederman" <ebiederm@xmission.com>
      Cc: Seth Forshee <seth.forshee@canonical.com>
      Cc: John Sperbeck <jsperbeck@google.com>
      Cc: Alexey Dobriyan <adobriyan@gmail.com>
      Cc: <stable@vger.kernel.org>	[4.8+]
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      7eb45a94
    • Eric W. Biederman's avatar
      signal: Correct namespace fixups of si_pid and si_uid · e897dd22
      Eric W. Biederman authored
      commit 7a0cf094 upstream.
      
      The function send_signal was split from __send_signal so that it would
      be possible to bypass the namespace logic based upon current[1].  As it
      turns out the si_pid and the si_uid fixup are both inappropriate in
      the case of kill_pid_usb_asyncio so move that logic into send_signal.
      
      It is difficult to arrange but possible for a signal with an si_code
      of SI_TIMER or SI_SIGIO to be sent across namespace boundaries.  In
      which case tests for when it is ok to change si_pid and si_uid based
      on SI_FROMUSER are incorrect.  Replace the use of SI_FROMUSER with a
      new test has_si_pid_and_used based on siginfo_layout.
      
      Now that the uid fixup is no longer present after expanding
      SEND_SIG_NOINFO properly calculate the si_uid that the target
      task needs to read.
      
      [1] 7978b567 ("signals: add from_ancestor_ns parameter to send_signal()")
      Cc: stable@vger.kernel.org
      Fixes: 6588c1e3 ("signals: SI_USER: Masquerade si_pid when crossing pid ns boundary")
      Fixes: 6b550f94 ("user namespace: make signal.c respect user namespaces")
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      e897dd22
    • Eric W. Biederman's avatar
      signal/usb: Replace kill_pid_info_as_cred with kill_pid_usb_asyncio · c8c3ea85
      Eric W. Biederman authored
      commit 70f1b0d3 upstream.
      
      The usb support for asyncio encoded one of it's values in the wrong
      field.  It should have used si_value but instead used si_addr which is
      not present in the _rt union member of struct siginfo.
      
      The practical result of this is that on a 64bit big endian kernel
      when delivering a signal to a 32bit process the si_addr field
      is set to NULL, instead of the expected pointer value.
      
      This issue can not be fixed in copy_siginfo_to_user32 as the usb
      usage of the the _sigfault (aka si_addr) member of the siginfo
      union when SI_ASYNCIO is set is incompatible with the POSIX and
      glibc usage of the _rt member of the siginfo union.
      
      Therefore replace kill_pid_info_as_cred with kill_pid_usb_asyncio a
      dedicated function for this one specific case.  There are no other
      users of kill_pid_info_as_cred so this specialization should have no
      impact on the amount of code in the kernel.  Have kill_pid_usb_asyncio
      take instead of a siginfo_t which is difficult and error prone, 3
      arguments, a signal number, an errno value, and an address enconded as
      a sigval_t.  The encoding of the address as a sigval_t allows the
      code that reads the userspace request for a signal to handle this
      compat issue along with all of the other compat issues.
      
      Add BUILD_BUG_ONs in kernel/signal.c to ensure that we can now place
      the pointer value at the in si_pid (instead of si_addr).  That is the
      code now verifies that si_pid and si_addr always occur at the same
      location.  Further the code veries that for native structures a value
      placed in si_pid and spilling into si_uid will appear in userspace in
      si_addr (on a byte by byte copy of siginfo or a field by field copy of
      siginfo).  The code also verifies that for a 64bit kernel and a 32bit
      userspace the 32bit pointer will fit in si_pid.
      
      I have used the usbsig.c program below written by Alan Stern and
      slightly tweaked by me to run on a big endian machine to verify the
      issue exists (on sparc64) and to confirm the patch below fixes the issue.
      
       /* usbsig.c -- test USB async signal delivery */
      
       #define _GNU_SOURCE
       #include <stdio.h>
       #include <fcntl.h>
       #include <signal.h>
       #include <string.h>
       #include <sys/ioctl.h>
       #include <unistd.h>
       #include <endian.h>
       #include <linux/usb/ch9.h>
       #include <linux/usbdevice_fs.h>
      
       static struct usbdevfs_urb urb;
       static struct usbdevfs_disconnectsignal ds;
       static volatile sig_atomic_t done = 0;
      
       void urb_handler(int sig, siginfo_t *info , void *ucontext)
       {
       	printf("Got signal %d, signo %d errno %d code %d addr: %p urb: %p\n",
       	       sig, info->si_signo, info->si_errno, info->si_code,
       	       info->si_addr, &urb);
      
       	printf("%s\n", (info->si_addr == &urb) ? "Good" : "Bad");
       }
      
       void ds_handler(int sig, siginfo_t *info , void *ucontext)
       {
       	printf("Got signal %d, signo %d errno %d code %d addr: %p ds: %p\n",
       	       sig, info->si_signo, info->si_errno, info->si_code,
       	       info->si_addr, &ds);
      
       	printf("%s\n", (info->si_addr == &ds) ? "Good" : "Bad");
       	done = 1;
       }
      
       int main(int argc, char **argv)
       {
       	char *devfilename;
       	int fd;
       	int rc;
       	struct sigaction act;
       	struct usb_ctrlrequest *req;
       	void *ptr;
       	char buf[80];
      
       	if (argc != 2) {
       		fprintf(stderr, "Usage: usbsig device-file-name\n");
       		return 1;
       	}
      
       	devfilename = argv[1];
       	fd = open(devfilename, O_RDWR);
       	if (fd == -1) {
       		perror("Error opening device file");
       		return 1;
       	}
      
       	act.sa_sigaction = urb_handler;
       	sigemptyset(&act.sa_mask);
       	act.sa_flags = SA_SIGINFO;
      
       	rc = sigaction(SIGUSR1, &act, NULL);
       	if (rc == -1) {
       		perror("Error in sigaction");
       		return 1;
       	}
      
       	act.sa_sigaction = ds_handler;
       	sigemptyset(&act.sa_mask);
       	act.sa_flags = SA_SIGINFO;
      
       	rc = sigaction(SIGUSR2, &act, NULL);
       	if (rc == -1) {
       		perror("Error in sigaction");
       		return 1;
       	}
      
       	memset(&urb, 0, sizeof(urb));
       	urb.type = USBDEVFS_URB_TYPE_CONTROL;
       	urb.endpoint = USB_DIR_IN | 0;
       	urb.buffer = buf;
       	urb.buffer_length = sizeof(buf);
       	urb.signr = SIGUSR1;
      
       	req = (struct usb_ctrlrequest *) buf;
       	req->bRequestType = USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE;
       	req->bRequest = USB_REQ_GET_DESCRIPTOR;
       	req->wValue = htole16(USB_DT_DEVICE << 8);
       	req->wIndex = htole16(0);
       	req->wLength = htole16(sizeof(buf) - sizeof(*req));
      
       	rc = ioctl(fd, USBDEVFS_SUBMITURB, &urb);
       	if (rc == -1) {
       		perror("Error in SUBMITURB ioctl");
       		return 1;
       	}
      
       	rc = ioctl(fd, USBDEVFS_REAPURB, &ptr);
       	if (rc == -1) {
       		perror("Error in REAPURB ioctl");
       		return 1;
       	}
      
       	memset(&ds, 0, sizeof(ds));
       	ds.signr = SIGUSR2;
       	ds.context = &ds;
       	rc = ioctl(fd, USBDEVFS_DISCSIGNAL, &ds);
       	if (rc == -1) {
       		perror("Error in DISCSIGNAL ioctl");
       		return 1;
       	}
      
       	printf("Waiting for usb disconnect\n");
       	while (!done) {
       		sleep(1);
       	}
      
       	close(fd);
       	return 0;
       }
      
      Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
      Cc: linux-usb@vger.kernel.org
      Cc: Alan Stern <stern@rowland.harvard.edu>
      Cc: Oliver Neukum <oneukum@suse.com>
      Fixes: v2.3.39
      Cc: stable@vger.kernel.org
      Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      c8c3ea85
    • Julien Thierry's avatar
      arm64: irqflags: Add condition flags to inline asm clobber list · 2cd1c187
      Julien Thierry authored
      commit f5706578 upstream.
      
      Some of the inline assembly instruction use the condition flags and need
      to include "cc" in the clobber list.
      
      Fixes: 4a503217 ("arm64: irqflags: Use ICC_PMR_EL1 for interrupt masking")
      Cc: <stable@vger.kernel.org> # 5.1.x-
      Suggested-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Reviewed-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      Acked-by: default avatarMark Rutland <mark.rutland@arm.com>
      Signed-off-by: default avatarJulien Thierry <julien.thierry@arm.com>
      Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      2cd1c187
    • Jon Hunter's avatar
      arm64: tegra: Fix AGIC register range · cc43c9ef
      Jon Hunter authored
      commit ba24eee6 upstream.
      
      The Tegra AGIC interrupt controller is an ARM GIC400 interrupt
      controller. Per the ARM GIC device-tree binding, the first address
      region is for the GIC distributor registers and the second address
      region is for the GIC CPU interface registers. The address space for
      the distributor registers is 4kB, but currently this is incorrectly
      defined as 8kB for the Tegra AGIC and overlaps with the CPU interface
      registers. Correct the address space for the distributor to be 4kB.
      
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarJon Hunter <jonathanh@nvidia.com>
      Fixes: bcdbde43 ("arm64: tegra: Add AGIC node for Tegra210")
      Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      cc43c9ef
    • Like Xu's avatar
      KVM: x86/vPMU: refine kvm_pmu err msg when event creation failed · edadec19
      Like Xu authored
      commit 6fc3977c upstream.
      
      If a perf_event creation fails due to any reason of the host perf
      subsystem, it has no chance to log the corresponding event for guest
      which may cause abnormal sampling data in guest result. In debug mode,
      this message helps to understand the state of vPMC and we may not
      limit the number of occurrences but not in a spamming style.
      Suggested-by: default avatarJoe Perches <joe@perches.com>
      Signed-off-by: default avatarLike Xu <like.xu@linux.intel.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      edadec19
    • Michael Neuling's avatar
      KVM: PPC: Book3S HV: Fix CR0 setting in TM emulation · 95680d0e
      Michael Neuling authored
      commit 3fefd1cd upstream.
      
      When emulating tsr, treclaim and trechkpt, we incorrectly set CR0. The
      code currently sets:
          CR0 <- 00 || MSR[TS]
      but according to the ISA it should be:
          CR0 <-  0 || MSR[TS] || 0
      
      This fixes the bit shift to put the bits in the correct location.
      
      This is a data integrity issue as CR0 is corrupted.
      
      Fixes: 4bb3c7a0 ("KVM: PPC: Book3S HV: Work around transactional memory bugs in POWER9")
      Cc: stable@vger.kernel.org # v4.17+
      Tested-by: default avatarSuraj Jitindar Singh <sjitindarsingh@gmail.com>
      Signed-off-by: default avatarMichael Neuling <mikey@neuling.org>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      95680d0e
    • Suraj Jitindar Singh's avatar
      KVM: PPC: Book3S HV: Clear pending decrementer exceptions on nested guest entry · 5328368b
      Suraj Jitindar Singh authored
      commit 3c25ab35 upstream.
      
      If we enter an L1 guest with a pending decrementer exception then this
      is cleared on guest exit if the guest has writtien a positive value
      into the decrementer (indicating that it handled the decrementer
      exception) since there is no other way to detect that the guest has
      handled the pending exception and that it should be dequeued. In the
      event that the L1 guest tries to run a nested (L2) guest immediately
      after this and the L2 guest decrementer is negative (which is loaded
      by L1 before making the H_ENTER_NESTED hcall), then the pending
      decrementer exception isn't cleared and the L2 entry is blocked since
      L1 has a pending exception, even though L1 may have already handled
      the exception and written a positive value for it's decrementer. This
      results in a loop of L1 trying to enter the L2 guest and L0 blocking
      the entry since L1 has an interrupt pending with the outcome being
      that L2 never gets to run and hangs.
      
      Fix this by clearing any pending decrementer exceptions when L1 makes
      the H_ENTER_NESTED hcall since it won't do this if it's decrementer
      has gone negative, and anyway it's decrementer has been communicated
      to L0 in the hdec_expires field and L0 will return control to L1 when
      this goes negative by delivering an H_DECREMENTER exception.
      
      Fixes: 95a6432c ("KVM: PPC: Book3S HV: Streamlined guest entry/exit path on P9 for radix guests")
      Cc: stable@vger.kernel.org # v4.20+
      Signed-off-by: default avatarSuraj Jitindar Singh <sjitindarsingh@gmail.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      5328368b
    • Suraj Jitindar Singh's avatar
      KVM: PPC: Book3S HV: Signed extend decrementer value if not using large decrementer · eb6bb8d5
      Suraj Jitindar Singh authored
      commit 86953770 upstream.
      
      On POWER9 the decrementer can operate in large decrementer mode where
      the decrementer is 56 bits and signed extended to 64 bits. When not
      operating in this mode the decrementer behaves as a 32 bit decrementer
      which is NOT signed extended (as on POWER8).
      
      Currently when reading a guest decrementer value we don't take into
      account whether the large decrementer is enabled or not, and this
      means the value will be incorrect when the guest is not using the
      large decrementer. Fix this by sign extending the value read when the
      guest isn't using the large decrementer.
      
      Fixes: 95a6432c ("KVM: PPC: Book3S HV: Streamlined guest entry/exit path on P9 for radix guests")
      Cc: stable@vger.kernel.org # v4.20+
      Signed-off-by: default avatarSuraj Jitindar Singh <sjitindarsingh@gmail.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      eb6bb8d5
    • Wanpeng Li's avatar
      KVM: VMX: check CPUID before allowing read/write of IA32_XSS · f4905184
      Wanpeng Li authored
      commit 4d763b16 upstream.
      
      Raise #GP when guest read/write IA32_XSS, but the CPUID bits
      say that it shouldn't exist.
      
      Fixes: 20300099 (kvm: vmx: add MSR logic for XSAVES)
      Reported-by: default avatarXiaoyao Li <xiaoyao.li@linux.intel.com>
      Reported-by: default avatarTao Xu <tao3.xu@intel.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: Radim Krčmář <rkrcmar@redhat.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarWanpeng Li <wanpengli@tencent.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      f4905184
    • Sean Christopherson's avatar
      KVM: VMX: Fix handling of #MC that occurs during VM-Entry · e64176cd
      Sean Christopherson authored
      commit beb8d93b upstream.
      
      A previous fix to prevent KVM from consuming stale VMCS state after a
      failed VM-Entry inadvertantly blocked KVM's handling of machine checks
      that occur during VM-Entry.
      
      Per Intel's SDM, a #MC during VM-Entry is handled in one of three ways,
      depending on when the #MC is recognoized.  As it pertains to this bug
      fix, the third case explicitly states EXIT_REASON_MCE_DURING_VMENTRY
      is handled like any other VM-Exit during VM-Entry, i.e. sets bit 31 to
      indicate the VM-Entry failed.
      
      If a machine-check event occurs during a VM entry, one of the following occurs:
       - The machine-check event is handled as if it occurred before the VM entry:
              ...
       - The machine-check event is handled after VM entry completes:
              ...
       - A VM-entry failure occurs as described in Section 26.7. The basic
         exit reason is 41, for "VM-entry failure due to machine-check event".
      
      Explicitly handle EXIT_REASON_MCE_DURING_VMENTRY as a one-off case in
      vmx_vcpu_run() instead of binning it into vmx_complete_atomic_exit().
      Doing so allows vmx_vcpu_run() to handle VMX_EXIT_REASONS_FAILED_VMENTRY
      in a sane fashion and also simplifies vmx_complete_atomic_exit() since
      VMCS.VM_EXIT_INTR_INFO is guaranteed to be fresh.
      
      Fixes: b060ca3b ("kvm: vmx: Handle VMLAUNCH/VMRESUME failure properly")
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
      Reviewed-by: default avatarJim Mattson <jmattson@google.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      e64176cd
    • Sean Christopherson's avatar
      KVM: nVMX: Always sync GUEST_BNDCFGS when it comes from vmcs01 · 3ea511be
      Sean Christopherson authored
      commit 3b013a29 upstream.
      
      If L1 does not set VM_ENTRY_LOAD_BNDCFGS, then L1's BNDCFGS value must
      be propagated to vmcs02 since KVM always runs with VM_ENTRY_LOAD_BNDCFGS
      when MPX is supported.  Because the value effectively comes from vmcs01,
      vmcs02 must be updated even if vmcs12 is clean.
      
      Fixes: 62cf9bd8 ("KVM: nVMX: Fix emulation of VM_ENTRY_LOAD_BNDCFGS")
      Cc: stable@vger.kernel.org
      Cc: Liran Alon <liran.alon@oracle.com>
      Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      3ea511be
    • Sean Christopherson's avatar
      KVM: nVMX: Don't dump VMCS if virtual APIC page can't be mapped · 4ff7d3d1
      Sean Christopherson authored
      commit 73cb8556 upstream.
      
      ... as a malicious userspace can run a toy guest to generate invalid
      virtual-APIC page addresses in L1, i.e. flood the kernel log with error
      messages.
      
      Fixes: 69090810 ("KVM: nVMX: allow tests to use bad virtual-APIC page address")
      Cc: stable@vger.kernel.org
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      4ff7d3d1
    • Sakari Ailus's avatar
      media: videobuf2-dma-sg: Prevent size from overflowing · 95fdf43f
      Sakari Ailus authored
      commit 14f28f5c upstream.
      
      buf->size is an unsigned long; casting that to int will lead to an
      overflow if buf->size exceeds INT_MAX.
      
      Fix this by changing the type to unsigned long instead. This is possible
      as the buf->size is always aligned to PAGE_SIZE, and therefore the size
      will never have values lesser than 0.
      
      Note on backporting to stable: the file used to be under
      drivers/media/v4l2-core, it was moved to the current location after 4.14.
      Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
      Cc: stable@vger.kernel.org
      Reviewed-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
      Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      95fdf43f
    • Sakari Ailus's avatar
      media: videobuf2-core: Prevent size alignment wrapping buffer size to 0 · 1d9067ed
      Sakari Ailus authored
      commit defcdc5d upstream.
      
      PAGE_ALIGN() may wrap the buffer size around to 0. Prevent this by
      checking that the aligned value is not smaller than the unaligned one.
      
      Note on backporting to stable: the file used to be under
      drivers/media/v4l2-core, it was moved to the current location after 4.14.
      Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
      Cc: stable@vger.kernel.org
      Reviewed-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
      Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      1d9067ed
    • Ezequiel Garcia's avatar
      media: coda: Remove unbalanced and unneeded mutex unlock · 8829a3a0
      Ezequiel Garcia authored
      commit 766b9b16 upstream.
      
      The mutex unlock in the threaded interrupt handler is not paired
      with any mutex lock. Remove it.
      
      This bug has been here for a really long time, so it applies
      to any stable repo.
      Reviewed-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
      Signed-off-by: default avatarEzequiel Garcia <ezequiel@collabora.com>
      Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      8829a3a0
    • Boris Brezillon's avatar
      media: v4l2: Test type instead of cfg->type in v4l2_ctrl_new_custom() · 0efb4790
      Boris Brezillon authored
      commit 07d89227 upstream.
      
      cfg->type can be overridden by v4l2_ctrl_fill() and the new value is
      stored in the local type var. Fix the tests to use this local var.
      
      Fixes: 0996517c ("V4L/DVB: v4l2: Add new control handling framework")
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarBoris Brezillon <boris.brezillon@collabora.com>
      [hverkuil-cisco@xs4all.nl: change to !qmenu and !qmenu_int (checkpatch)]
      Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
      Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      0efb4790
    • Luis Henriques's avatar
      ceph: fix end offset in truncate_inode_pages_range call · baa616ae
      Luis Henriques authored
      commit d31d07b9 upstream.
      
      Commit e450f4d1 ("ceph: pass inclusive lend parameter to
      filemap_write_and_wait_range()") fixed the end offset parameter used to
      call filemap_write_and_wait_range and invalidate_inode_pages2_range.
      Unfortunately it missed truncate_inode_pages_range, introducing a
      regression that is easily detected by xfstest generic/130.
      
      The problem is that when doing direct IO it is possible that an extra page
      is truncated from the page cache when the end offset is page aligned.
      This can cause data loss if that page hasn't been sync'ed to the OSDs.
      
      While there, change code to use PAGE_ALIGN macro instead.
      
      Cc: stable@vger.kernel.org
      Fixes: e450f4d1 ("ceph: pass inclusive lend parameter to filemap_write_and_wait_range()")
      Signed-off-by: default avatarLuis Henriques <lhenriques@suse.com>
      Reviewed-by: default avatarJeff Layton <jlayton@kernel.org>
      Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      baa616ae
    • Takashi Iwai's avatar
      ALSA: hda/hdmi - Fix i915 reverse port/pin mapping · 1d149073
      Takashi Iwai authored
      commit 3140aafb upstream.
      
      The recent fix for Icelake HDMI codec introduced the mapping from pin
      NID to the i915 gfx port number.  However, it forgot the reverse
      mapping from the port number to the pin NID that is used in the ELD
      notifier callback.  As a result, it's processed to a wrong widget and
      gives a warning like
        snd_hda_codec_hdmi hdaudioC0D2: HDMI: pin nid 5 not registered
      
      This patch corrects it with a proper reverse mapping function.
      
      Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=204133
      Fixes: b0d8bc50 ("ALSA: hda: hdmi - add Icelake support")
      Reviewed-by: default avatarKai Vehmanen <kai.vehmanen@linux.intel.com>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      1d149073
    • Takashi Iwai's avatar
      ALSA: hda/hdmi - Remove duplicated define · 33b9b37d
      Takashi Iwai authored
      commit eb417711 upstream.
      
      INTEL_GET_VENDOR_VERB is defined twice identically.
      Let's remove a superfluous line.
      
      Fixes: b0d8bc50 ("ALSA: hda: hdmi - add Icelake support")
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      33b9b37d
    • Hui Wang's avatar
      ALSA: hda/realtek: apply ALC891 headset fixup to one Dell machine · 70981824
      Hui Wang authored
      commit 4b4e0e32 upstream.
      
      Without this patch, the headset-mic and headphone-mic don't work.
      
      Cc: <stable@vger.kernel.org>
      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>
      70981824
    • Kailang Yang's avatar
      ALSA: hda/realtek - Fixed Headphone Mic can't record on Dell platform · 7f6d5649
      Kailang Yang authored
      commit fbc57129 upstream.
      
      It assigned to wrong model. So, The headphone Mic can't work.
      
      Fixes: 3f640970 ("ALSA: hda - Fix headset mic detection problem for several Dell laptops")
      Signed-off-by: default avatarKailang Yang <kailang@realtek.com>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      7f6d5649
    • Takashi Iwai's avatar
      ALSA: hda - Don't resume forcibly i915 HDMI/DP codec · 68ffeea0
      Takashi Iwai authored
      commit 4914da2f upstream.
      
      We apply the codec resume forcibly at system resume callback for
      updating and syncing the jack detection state that may have changed
      during sleeping.  This is, however, superfluous for the codec like
      Intel HDMI/DP, where the jack detection is managed via the audio
      component notification; i.e. the jack state change shall be reported
      sooner or later from the graphics side at mode change.
      
      This patch changes the codec resume callback to avoid the forcible
      resume conditionally with a new flag, codec->relaxed_resume, for
      reducing the resume time.  The flag is set in the codec probe.
      
      Although this doesn't fix the entire bug mentioned in the bugzilla
      entry below, it's still a good optimization and some improvements are
      seen.
      
      Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=201901
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      68ffeea0