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| author | Alexey Khoroshilov <khoroshilov@ispras.ru> | 2013-03-27 14:08:46 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2013-03-28 17:10:25 +0100 |
| commit | 193d01532a730a53cbc74462799dbc43968b97fd (patch) | |
| tree | 917477d5227813f210a84f5f9eea124507dc975b /drivers/block/drbd | |
| parent | drbd: fix drbd epoch write count for ahead/behind mode (diff) | |
| download | linux-193d01532a730a53cbc74462799dbc43968b97fd.tar.xz linux-193d01532a730a53cbc74462799dbc43968b97fd.zip | |
drbd: add module_put() on error path in drbd_proc_open()
If single_open() fails in drbd_proc_open(), module refcount is left incremented.
The patch adds module_put() on the error path.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/drbd')
| -rw-r--r-- | drivers/block/drbd/drbd_proc.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/block/drbd/drbd_proc.c b/drivers/block/drbd/drbd_proc.c index 56672a61eb94..30fe0a57f5a0 100644 --- a/drivers/block/drbd/drbd_proc.c +++ b/drivers/block/drbd/drbd_proc.c @@ -313,8 +313,14 @@ static int drbd_seq_show(struct seq_file *seq, void *v) static int drbd_proc_open(struct inode *inode, struct file *file) { - if (try_module_get(THIS_MODULE)) - return single_open(file, drbd_seq_show, PDE(inode)->data); + int err; + + if (try_module_get(THIS_MODULE)) { + err = single_open(file, drbd_seq_show, PDE(inode)->data); + if (err) + module_put(THIS_MODULE); + return err; + } return -ENODEV; } |