diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2013-08-23 11:40:59 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-22 08:41:44 +0100 |
| commit | 826380d59f09185201d4327121f4919d2914a2cc (patch) | |
| tree | 4d7fb6c5f662e779b6408252b5e2292a67388a18 | |
| parent | ac008905d50badfe8b695fa3f1eef20ac352e3e6 (diff) | |
watchdog: ts72xx_wdt: locking bug in ioctl
commit 8612ed0d97abcf1c016d34755b7cf2060de71963 upstream.
Calling the WDIOC_GETSTATUS & WDIOC_GETBOOTSTATUS and twice will cause a
interruptible deadlock.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/watchdog/ts72xx_wdt.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/watchdog/ts72xx_wdt.c b/drivers/watchdog/ts72xx_wdt.c index 5a90a4a871d..87c0924ebfc 100644 --- a/drivers/watchdog/ts72xx_wdt.c +++ b/drivers/watchdog/ts72xx_wdt.c @@ -310,7 +310,8 @@ static long ts72xx_wdt_ioctl(struct file *file, unsigned int cmd, case WDIOC_GETSTATUS: case WDIOC_GETBOOTSTATUS: - return put_user(0, p); + error = put_user(0, p); + break; case WDIOC_KEEPALIVE: ts72xx_wdt_kick(wdt); |