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Subject[PATCH] staging/media: lirc_imon: fix leaks in imon_probe()
Date
Error handling of usb_submit_urb() is not as all others in imon_probe().
It just unlocks mutexes and returns nonzero leaving all already
allocated resources unfreed.

The patch makes sure all the resources are deallocated.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
---
drivers/staging/media/lirc/lirc_imon.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/media/lirc/lirc_imon.c b/drivers/staging/media/lirc/lirc_imon.c
index 0a2c45d..4afa7da 100644
--- a/drivers/staging/media/lirc/lirc_imon.c
+++ b/drivers/staging/media/lirc/lirc_imon.c
@@ -911,8 +911,8 @@ static int imon_probe(struct usb_interface *interface,
if (retval) {
dev_err(dev, "%s: usb_submit_urb failed for intf0 (%d)\n",
__func__, retval);
- mutex_unlock(&context->ctx_lock);
- goto exit;
+ alloc_status = 8;
+ goto unlock;
}

usb_set_intfdata(interface, context);
@@ -937,6 +937,8 @@ unlock:
alloc_status_switch:

switch (alloc_status) {
+ case 8:
+ lirc_unregister_driver(driver->minor);
case 7:
usb_free_urb(tx_urb);
case 6:
@@ -959,7 +961,6 @@ alloc_status_switch:
retval = 0;
}

-exit:
mutex_unlock(&driver_lock);

return retval;
--
1.8.1.2

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