| commit | d1ed3ba4e3d76b4ebec239c64f990c26d7935700 | [log] [tgz] |
|---|---|---|
| author | Guenter Roeck <linux@roeck-us.net> | Tue Mar 08 18:46:13 2016 -0800 |
| committer | Wim Van Sebroeck <wim@iguana.be> | Wed Mar 16 21:11:50 2016 +0100 |
| tree | 841d94b53efd656fef958538bee429f6c1c379de | |
| parent | 11d7aba9ceb726d86aaaca3eb5f7d79de38989c5 [diff] |
watchdog: Ensure that wdd is not dereferenced if NULL
Smatch rightfully complains that wdd is dereferenced in the watchdog
release function after being checked for NULL. Also make sure that it
is not accessed outside mutex protection to avoid use-after-free problems.
Fixes: e6c71e84e4c0 ("watchdog: Introduce WDOG_HW_RUNNING flag")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>