scsi: scsi_debug: Fix in_use bitmap corruption

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Heavy testing indicates the irqsave() spinlock around the __set_bit() is
insufficient to stop following clear_bit() calls being rarely applied
out-of-order. Also the nearby failed kzalloc() path leading to
SCSI_MLQUEUE_HOST_BUSY does not properly undo the in_use bitmap and
num_in_q, fix.

Link: https://lore.kernel.org/r/20200702145355.522283-1-dgilbert@interlog.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Douglas Gilbert 2020-07-02 10:53:55 -04:00 • committed by Martin K. Petersen

parent 93bf02e5a2

commit 74595c044c

1 changed files with 6 additions and 3 deletions

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drivers/scsi/scsi_debug.c

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