diff options
| author | Colin Ian King <colin.king@canonical.com> | 2020-04-03 12:04:37 +0100 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2020-04-03 13:38:24 +0200 |
| commit | 1821b79d6a7d6973d1630e71380da8bb5e95f3a5 (patch) | |
| tree | a15925b39a3d5edf37280b1eb5312804774cd372 /drivers/rtc | |
| parent | 3edf29d9d585237c53f06e44227c4b36c8794222 (diff) | |
| download | linux-1821b79d6a7d6973d1630e71380da8bb5e95f3a5.tar.bz2 | |
rtc: ds1307: check for failed memory allocation on wdt
Currently a failed memory allocation will lead to a null pointer
dereference on point wdt. Fix this by checking for a failed
allocation and just returning.
Addresses-Coverity: ("Dereference null return")
Fixes: fd90d48db037 ("rtc: ds1307: add support for watchdog timer on ds1388")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200403110437.57420-1-colin.king@canonical.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-ds1307.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index fad042118862..49702942bb08 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -1673,6 +1673,8 @@ static void ds1307_wdt_register(struct ds1307 *ds1307) return; wdt = devm_kzalloc(ds1307->dev, sizeof(*wdt), GFP_KERNEL); + if (!wdt) + return; wdt->info = &ds1388_wdt_info; wdt->ops = &ds1388_wdt_ops; |