1. 18 Oct, 2015 6 commits
  2. 12 Oct, 2015 1 commit
  3. 11 Oct, 2015 8 commits
  4. 10 Oct, 2015 12 commits
  5. 09 Oct, 2015 10 commits
  6. 08 Oct, 2015 3 commits
    • Mikulas Patocka's avatar
      crash in md-raid1 and md-raid10 due to incorrect list manipulation · a452744b
      Mikulas Patocka authored
      The commit 55ce74d4 (md/raid1: ensure
      device failure recorded before write request returns) is causing crash in
      the LVM2 testsuite test shell/lvchange-raid.sh. For me the crash is 100%
      reproducible.
      
      The reason for the crash is that the newly added code in raid1d moves the
      list from conf->bio_end_io_list to tmp, then tests if tmp is non-empty and
      then incorrectly pops the bio from conf->bio_end_io_list (which is empty
      because the list was alrady moved).
      
      Raid-10 has a similar bug.
      
      Kernel Fault: Code=15 regs=000000006ccb8640 (Addr=0000000100000000)
      CPU: 3 PID: 1930 Comm: mdX_raid1 Not tainted 4.2.0-rc5-bisect+ #35
      task: 000000006cc1f258 ti: 000000006ccb8000 task.ti: 000000006ccb8000
      
           YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
      PSW: 00001000000001001111111000001111 Not tainted
      r00-03  000000ff0804fe0f 000000001059d000 000000001059f818 000000007f16be38
      r04-07  000000001059d000 000000007f16be08 0000000000200200 0000000000000001
      r08-11  000000006ccb8260 000000007b7934d0 0000000000000001 0000000000000000
      r12-15  000000004056f320 0000000000000000 0000000000013dd0 0000000000000000
      r16-19  00000000f0d00ae0 0000000000000000 0000000000000000 0000000000000001
      r20-23  000000000800000f 0000000042200390 0000000000000000 0000000000000000
      r24-27  0000000000000001 000000000800000f 000000007f16be08 000000001059d000
      r28-31  0000000100000000 000000006ccb8560 000000006ccb8640 0000000000000000
      sr00-03  0000000000249800 0000000000000000 0000000000000000 0000000000249800
      sr04-07  0000000000000000 0000000000000000 0000000000000000 0000000000000000
      
      IASQ: 0000000000000000 0000000000000000 IAOQ: 000000001059f61c 000000001059f620
       IIR: 0f8010c6    ISR: 0000000000000000  IOR: 0000000100000000
       CPU:        3   CR30: 000000006ccb8000 CR31: 0000000000000000
       ORIG_R28: 000000001059d000
       IAOQ[0]: call_bio_endio+0x34/0x1a8 [raid1]
       IAOQ[1]: call_bio_endio+0x38/0x1a8 [raid1]
       RP(r2): raid_end_bio_io+0x88/0x168 [raid1]
      Backtrace:
       [<000000001059f818>] raid_end_bio_io+0x88/0x168 [raid1]
       [<00000000105a4f64>] raid1d+0x144/0x1640 [raid1]
       [<000000004017fd5c>] kthread+0x144/0x160
      Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
      Fixes: 55ce74d4 ("md/raid1: ensure device failure recorded before write request returns.")
      Fixes: 95af587e ("md/raid10: ensure device failure recorded before write request returns.")
      Signed-off-by: default avatarNeilBrown <neilb@suse.com>
      a452744b
    • Srinivas Pandruvada's avatar
      cpufreq: prevent lockup on reading scaling_available_frequencies · 55582bcc
      Srinivas Pandruvada authored
      When scaling_available_frequencies is read on an offlined cpu, then
      either lockup or junk values are displayed. This is caused by
      freed freq_table, which policy is using.
      Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
      Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      55582bcc
    • Srinivas Pandruvada's avatar
      cpufreq: acpi_cpufreq: prevent crash on reading freqdomain_cpus · e2530367
      Srinivas Pandruvada authored
      When freqdomain_cpus attribute is read from an offlined cpu, it will
      cause crash. This change prevents calling cpufreq_show_cpus when
      policy driver_data is NULL.
      
      Crash info:
      
      [  170.814949] BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
      [  170.814990] IP: [<ffffffff813b2490>] _find_next_bit.part.0+0x10/0x70
      [  170.815021] PGD 227d30067 PUD 229e56067 PMD 0
      [  170.815043] Oops: 0000 [#2] SMP
      [  170.816022] CPU: 3 PID: 3121 Comm: cat Tainted: G      D    OE   4.3.0-rc3+ #33
      ...
      ...
      [  170.816657] Call Trace:
      [  170.816672]  [<ffffffff813b2505>] ? find_next_bit+0x15/0x20
      [  170.816696]  [<ffffffff8160e47c>] cpufreq_show_cpus+0x5c/0xd0
      [  170.816722]  [<ffffffffa031a409>] show_freqdomain_cpus+0x19/0x20 [acpi_cpufreq]
      [  170.816749]  [<ffffffff8160e65b>] show+0x3b/0x60
      [  170.816769]  [<ffffffff8129b31c>] sysfs_kf_seq_show+0xbc/0x130
      [  170.816793]  [<ffffffff81299be3>] kernfs_seq_show+0x23/0x30
      [  170.816816]  [<ffffffff81240f2c>] seq_read+0xec/0x390
      [  170.816837]  [<ffffffff8129a64a>] kernfs_fop_read+0x10a/0x160
      [  170.816861]  [<ffffffff8121d9b7>] __vfs_read+0x37/0x100
      [  170.816883]  [<ffffffff813217c0>] ? security_file_permission+0xa0/0xc0
      [  170.816909]  [<ffffffff8121e2e3>] vfs_read+0x83/0x130
      [  170.816930]  [<ffffffff8121f035>] SyS_read+0x55/0xc0
      ...
      ...
      [  170.817185] ---[ end trace bc6eadf82b2b965a ]---
      Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
      Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
      Cc: 4.2+ <stable@vger.kernel.org> # 4.2+
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      e2530367