| Message ID | e5a57815b34e85d7c338841d5c17097afe235f38.1714649924.git.hverkuil-cisco@xs4all.nl |
|---|---|
| State | Accepted |
| Commit | 42bcaacae924bf18ae387c3f78c202df0b739292 |
| Headers | show |
| Series | media: cec: syzkaller fixes | expand |
diff --git a/drivers/media/cec/core/cec-api.c b/drivers/media/cec/core/cec-api.c index 67dc79ef17050..d64bb716f9c68 100644 --- a/drivers/media/cec/core/cec-api.c +++ b/drivers/media/cec/core/cec-api.c @@ -664,6 +664,8 @@ static int cec_release(struct inode *inode, struct file *filp) list_del_init(&data->xfer_list); } mutex_unlock(&adap->lock); + + mutex_lock(&fh->lock); while (!list_empty(&fh->msgs)) { struct cec_msg_entry *entry = list_first_entry(&fh->msgs, struct cec_msg_entry, list); @@ -681,6 +683,7 @@ static int cec_release(struct inode *inode, struct file *filp) kfree(entry); } } + mutex_unlock(&fh->lock); kfree(fh); cec_put_device(devnode);
When cec_release() uses fh->msgs it has to take fh->lock, otherwise the list can get corrupted. Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Reported-by: Yang, Chenyuan <cy54@illinois.edu> Fixes: ca684386e6e2 ("[media] cec: add HDMI CEC framework (api)") Closes: https://lore.kernel.org/linux-media/PH7PR11MB57688E64ADE4FE82E658D86DA09EA@PH7PR11MB5768.namprd11.prod.outlook.com/ --- drivers/media/cec/core/cec-api.c | 3 +++ 1 file changed, 3 insertions(+)