* [BUG] drivers/scsi/ipr: two possible sleep-in-atomic bugs
@ 2017-12-12 3:00 Jia-Ju Bai
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From: Jia-Ju Bai @ 2017-12-12 3:00 UTC (permalink / raw)
To: brking, jejb, martin.petersen, Linux Kernel Mailing List, linux-scsi
According to drivers/scsi/ipr.c, the kernel module may sleep under a
spinlock.
The function call paths are:
ipr_shutdown (acquire the spinlock)
irq_poll_disable
msleep --> may sleep
ipr_ata_post_internal (acquire the spinlock)
ipr_device_reset
ipr_send_blocking_cmd
wait_for_completion --> may sleep (&hrrq->_lock is still held)
I do not find a good way to fix them, so I only report.
These possible bugs are found by my static analysis tool (DSAC) and
checked by my code review.
Thanks,
Jia-Ju Bai
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2017-12-12 3:00 [BUG] drivers/scsi/ipr: two possible sleep-in-atomic bugs Jia-Ju Bai
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