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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2018-11-12 08:42:14 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-26 09:42:52 +0100 |
| commit | 9ec298cc874d08020f45791a8396e1593c3278c1 (patch) | |
| tree | f406abf89cb02aa39c800d9070c2039c0d564318 /drivers/block | |
| parent | 611f77199cd763e6b7c0462c2f199ddb3a089750 (diff) | |
| download | linux-stable-9ec298cc874d08020f45791a8396e1593c3278c1.tar.gz linux-stable-9ec298cc874d08020f45791a8396e1593c3278c1.tar.bz2 linux-stable-9ec298cc874d08020f45791a8396e1593c3278c1.zip | |
loop: Fix double mutex_unlock(&loop_ctl_mutex) in loop_control_ioctl()
commit 628bd85947091830a8c4872adfd5ed1d515a9cf2 upstream.
Commit 0a42e99b58a20883 ("loop: Get rid of loop_index_mutex") forgot to
remove mutex_unlock(&loop_ctl_mutex) from loop_control_ioctl() when
replacing loop_index_mutex with loop_ctl_mutex.
Fixes: 0a42e99b58a20883 ("loop: Get rid of loop_index_mutex")
Reported-by: syzbot <syzbot+c0138741c2290fc5e63f@syzkaller.appspotmail.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/loop.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c index a51f7b066f17..b1cf891cb3d9 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -1936,12 +1936,10 @@ static long loop_control_ioctl(struct file *file, unsigned int cmd, break; if (lo->lo_state != Lo_unbound) { ret = -EBUSY; - mutex_unlock(&loop_ctl_mutex); break; } if (atomic_read(&lo->lo_refcnt) > 0) { ret = -EBUSY; - mutex_unlock(&loop_ctl_mutex); break; } lo->lo_disk->private_data = NULL; |