| Message ID | 20231219063639.450994-1-harshit.m.mogalapalli@oracle.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | e7d3b9f28654dbfce7e09f8028210489adaf6a33 |
| Headers | show |
| Series | usb: yurex: Fix inconsistent locking bug in yurex_read() | expand |
diff --git a/drivers/usb/misc/yurex.c b/drivers/usb/misc/yurex.c index 5a13cddace0e..9a0649d23693 100644 --- a/drivers/usb/misc/yurex.c +++ b/drivers/usb/misc/yurex.c @@ -414,8 +414,10 @@ static ssize_t yurex_read(struct file *file, char __user *buffer, size_t count, return -ENODEV; } - if (WARN_ON_ONCE(dev->bbu > S64_MAX || dev->bbu < S64_MIN)) + if (WARN_ON_ONCE(dev->bbu > S64_MAX || dev->bbu < S64_MIN)) { + mutex_unlock(&dev->io_mutex); return -EIO; + } spin_lock_irqsave(&dev->lock, flags); scnprintf(in_buffer, MAX_S64_STRLEN, "%lld\n", dev->bbu);
Unlock before returning on the error path. Fixes: 86b20af11e84 ("usb: yurex: Replace snprintf() with the safer scnprintf() variant") Reported-by: Dan Carpenter <error27@gmail.com> Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/r/202312170252.3udgrIcP-lkp@intel.com/ Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com> --- drivers/usb/misc/yurex.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)