1. 19 Oct, 2021 1 commit
  2. 17 Oct, 2021 2 commits
    • Miles Chen's avatar
      scsi: sd: Fix crashes in sd_resume_runtime() · 85374b63
      Miles Chen authored
      After commit ed4246d3 ("scsi: sd: REQUEST SENSE for
      BLIST_IGN_MEDIA_CHANGE devices in runtime_resume()"), the following crash
      was observed.
      
      static int sd_resume_runtime(struct device *dev)
      {
              struct scsi_disk *sdkp = dev_get_drvdata(dev);
              struct scsi_device *sdp = sdkp->device; // sdkp == NULL and crash
      
              if (sdp->ignore_media_change) {
      	...
      }
      
      It is possible for sdkp to be NULL in sd_resume_runtime(). To fix this
      crash, follow sd_resume() to test if sdkp is NULL before dereferencing it.
      
      Crash:
      [    4.695171][  T151] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008
      [    4.696591][  T151] Mem abort info:
      [    4.697919][  T151]   ESR = 0x96000005
      [    4.699692][  T151]   EC = 0x25: DABT (current EL), IL = 32 bits
      [    4.701990][  T151]   SET = 0, FnV = 0
      [    4.702513][  T151]   EA = 0, S1PTW = 0
      [    4.704431][  T151]   FSC = 0x05: level 1 translation fault
      [    4.705254][  T151] Data abort info:
      [    4.705806][  T151]   ISV = 0, ISS = 0x00000005
      [    4.706484][  T151]   CM = 0, WnR = 0
      [    4.707048][  T151] [0000000000000008] user address but active_mm is swapper
      [    4.710577][  T151] Internal error: Oops: 96000005 [#1] PREEMPT SMP
      [    4.832361][  T151] Kernel Offset: 0x12acc80000 from 0xffffffc010000000
      [    4.833254][  T151] PHYS_OFFSET: 0x40000000
      [    4.833814][  T151] pstate: 80400005 (Nzcv daif +PAN -UAO)
      [    4.834546][  T151] pc : sd_resume_runtime+0x20/0x14c
      [    4.835227][  T151] lr : scsi_runtime_resume+0x84/0xe4
      [    4.835916][  T151] sp : ffffffc0110db8d0
      [    4.836450][  T151] x29: ffffffc0110db8d0 x28: 0000000000000001
      [    4.837258][  T151] x27: ffffff80c0bd1ac0 x26: ffffff80c0bd1ad0
      [    4.838063][  T151] x25: ffffff80cea7e448 x24: ffffffd2bf961000
      [    4.838867][  T151] x23: ffffffd2be69f838 x22: ffffffd2bd9dfb4c
      [    4.839670][  T151] x21: 0000000000000000 x20: ffffff80cea7e000
      [    4.840474][  T151] x19: ffffff80cea7e260 x18: ffffffc0110dd078
      [    4.841277][  T151] x17: 00000000658783d9 x16: 0000000051469dac
      [    4.842081][  T151] x15: 00000000b87f6327 x14: 0000000068fd680d
      [    4.842885][  T151] x13: ffffff80c0bd2470 x12: ffffffd2bfa7f5f0
      [    4.843688][  T151] x11: 0000000000000078 x10: 0000000000000001
      [    4.844492][  T151] x9 : 00000000000000b1 x8 : ffffffd2be69f88c
      [    4.845295][  T151] x7 : ffffffd2bd9e0e5c x6 : 0000000000000000
      [    4.846099][  T151] x5 : 0000000000000080 x4 : 0000000000000001
      [    4.846902][  T151] x3 : 68fd680dfe4ebe5e x2 : 0000000000000003
      [    4.847706][  T151] x1 : ffffffd2bf7f9380 x0 : ffffff80cea7e260
      [    4.856708][  T151]  die+0x16c/0x59c
      [    4.857191][  T151]  __do_kernel_fault+0x1e8/0x210
      [    4.857833][  T151]  do_page_fault+0xa4/0x654
      [    4.858418][  T151]  do_translation_fault+0x6c/0x1b0
      [    4.859083][  T151]  do_mem_abort+0x68/0x10c
      [    4.859655][  T151]  el1_abort+0x40/0x64
      [    4.860182][  T151]  el1h_64_sync_handler+0x54/0x88
      [    4.860834][  T151]  el1h_64_sync+0x7c/0x80
      [    4.861395][  T151]  sd_resume_runtime+0x20/0x14c
      [    4.862025][  T151]  scsi_runtime_resume+0x84/0xe4
      [    4.862667][  T151]  __rpm_callback+0x1f4/0x8cc
      [    4.863275][  T151]  rpm_resume+0x7e8/0xaa4
      [    4.863836][  T151]  __pm_runtime_resume+0xa0/0x110
      [    4.864489][  T151]  sd_probe+0x30/0x428
      [    4.865016][  T151]  really_probe+0x14c/0x500
      [    4.865602][  T151]  __driver_probe_device+0xb4/0x18c
      [    4.866278][  T151]  driver_probe_device+0x60/0x2c4
      [    4.866931][  T151]  __device_attach_driver+0x228/0x2bc
      [    4.867630][  T151]  __device_attach_async_helper+0x154/0x21c
      [    4.868398][  T151]  async_run_entry_fn+0x5c/0x1c4
      [    4.869038][  T151]  process_one_work+0x3ac/0x590
      [    4.869670][  T151]  worker_thread+0x320/0x758
      [    4.870265][  T151]  kthread+0x2e8/0x35c
      [    4.870792][  T151]  ret_from_fork+0x10/0x20
      
      Link: https://lore.kernel.org/r/20211015074654.19615-1-miles.chen@mediatek.com
      Fixes: ed4246d3 ("scsi: sd: REQUEST SENSE for BLIST_IGN_MEDIA_CHANGE devices in runtime_resume()")
      Cc: Stanley Chu <stanley.chu@mediatek.com>
      Reviewed-by: default avatarMartin Kepplinger <martin.kepplinger@puri.sm>
      Reviewed-by: default avatarStanley Chu <stanley.chu@mediatek.com>
      Signed-off-by: default avatarMiles Chen <miles.chen@mediatek.com>
      Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
      85374b63
    • Sreekanth Reddy's avatar
      scsi: mpi3mr: Fix duplicate device entries when scanning through sysfs · 97e6ea6d
      Sreekanth Reddy authored
      When scanning devices through the 'scan' attribute in sysfs, the user will
      observe duplicate device entries in lsscsi command output.
      
      Set the shost's max_channel to zero to avoid this.
      
      Link: https://lore.kernel.org/r/20211014055425.30719-1-sreekanth.reddy@broadcom.com
      Fixes: 824a1566 ("scsi: mpi3mr: Base driver code")
      Signed-off-by: default avatarSreekanth Reddy <sreekanth.reddy@broadcom.com>
      Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
      97e6ea6d
  3. 13 Oct, 2021 2 commits
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  8. 14 Sep, 2021 11 commits