blktrace: fix trace mutex deadlock

Browse source

commit 2967acbb25 upstream.

A previous commit changed the locking around registration/cleanup,
but direct callers of blk_trace_remove() were missed. This means
that if we hit the error path in setup, we will deadlock on
attempting to re-acquire the queue trace mutex.

Fixes: 1f2cac107c ("blktrace: fix unlocked access to init/start-stop/teardown")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

This commit is contained in:

Jens Axboe 2017-11-19 11:52:55 -07:00 • committed by Ben Hutchings

parent 804fb1c7c6

commit 7749cab0b9

1 changed files with 2 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

4

kernel/trace/blktrace.c

View file