* A potential data race in drivers/scsi/mvumi.ko
@ 2016-08-12 12:39 Pavel Andrianov
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From: Pavel Andrianov @ 2016-08-12 12:39 UTC (permalink / raw)
To: James E.J. Bottomley
Cc: Martin K. Petersen, linux-scsi, linux-kernel, Vaishali Thakkar,
ldv-project
Hi!
There is a potential data race in drivers/scsi/mvumi.ko.
Regard such case:
Thread 1 Thread 2
...
-> mvumi_reset_host_9500 -
is called without any locking
-> mvumi_wait_for_outstanding
->mvumi_start
->mvumi_check_handshake
-> mvumi_handshake_event
-> mvumi_handshake
->mvumi_hs_build_page
interrupt comes
-> mvumi_isr_handler
-> mvumi_handshake
-> mvumi_hs_build_page
In this case the same data mhba->handshake_page is modified from two
threads. Likely the first thread should acquire the same spinlock
mhba->shost->host_lock as the second thread.
--
Pavel Andrianov
Linux Verification Center, ISPRAS
web: http://linuxtesting.org
e-mail: andrianov@ispras.ru
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2016-08-12 12:39 A potential data race in drivers/scsi/mvumi.ko Pavel Andrianov
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