blktrace: fix unlocked access to init/start-stop/teardown

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commit 1f2cac107c upstream.

sg.c calls into the blktrace functions without holding the proper queue
mutex for doing setup, start/stop, or teardown.

Add internal unlocked variants, and export the ones that do the proper
locking.

Fixes: 6da127ad09 ("blktrace: Add blktrace ioctls to SCSI generic devices")
Tested-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

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Jens Axboe 2017-11-05 09:13:48 -07:00 • committed by Ben Hutchings

parent f3f6031fd1

commit 0dea4044c7

1 changed files with 48 additions and 10 deletions

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kernel/trace/blktrace.c

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