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| author | Peter Wang <peter.wang@mediatek.com> | 2023-11-06 08:51:17 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-11-09 03:40:41 +0100 |
| commit | 27900d7119c464b43cd9eac69c85884d17bae240 (patch) | |
| tree | cb463f09c5ed430bce718d3a635e046cdc816a6f /drivers/scsi/scsi_debug.c | |
| parent | scsi: ufs: core: Expand MCQ queue slot to DeviceQueueDepth + 1 (diff) | |
| download | linux-27900d7119c464b43cd9eac69c85884d17bae240.tar.xz linux-27900d7119c464b43cd9eac69c85884d17bae240.zip | |
scsi: ufs: core: Fix racing issue between ufshcd_mcq_abort() and ISR
If command timeout happens and cq complete IRQ is raised at the same time,
ufshcd_mcq_abort clears lprb->cmd and a NULL pointer deref happens in the
ISR. Error log:
ufshcd_abort: Device abort task at tag 18
Unable to handle kernel NULL pointer dereference at virtual address
0000000000000108
pc : [0xffffffe27ef867ac] scsi_dma_unmap+0xc/0x44
lr : [0xffffffe27f1b898c] ufshcd_release_scsi_cmd+0x24/0x114
Fixes: f1304d442077 ("scsi: ufs: mcq: Added ufshcd_mcq_abort()")
Cc: stable@vger.kernel.org
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20231106075117.8995-1-peter.wang@mediatek.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_debug.c')
0 files changed, 0 insertions, 0 deletions