From: Colin King <colin.king@canonical.com> To: Alessandro Zummo <a.zummo@towertech.it>, Alexandre Belloni <alexandre.belloni@bootlin.com>, Guenter Roeck <linux@roeck-us.net>, Chris Packham <chris.packham@alliedtelesis.co.nz>, linux-rtc@vger.kernel.org Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH][next][V3] rtc: ds1307: check for failed memory allocation on wdt Date: Fri, 3 Apr 2020 12:04:37 +0100 [thread overview] Message-ID: <20200403110437.57420-1-colin.king@canonical.com> (raw) From: Colin Ian King <colin.king@canonical.com> 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> --- V2: move error exit label and remove a return statement, thanks to Walter Harms for spotting this clean up. V3: simplify, just bail out and return on detecting the out of memory condition --- drivers/rtc/rtc-ds1307.c | 2 ++ 1 file changed, 2 insertions(+) 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; -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Colin King <colin.king@canonical.com> To: Alessandro Zummo <a.zummo@towertech.it>, Alexandre Belloni <alexandre.belloni@bootlin.com>, Guenter Roeck <linux@roeck-us.net>, Chris Packham <chris.packham@alliedtelesis.co.nz>, linux-rtc@vger.kernel.org Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH][next][V3] rtc: ds1307: check for failed memory allocation on wdt Date: Fri, 03 Apr 2020 11:04:37 +0000 [thread overview] Message-ID: <20200403110437.57420-1-colin.king@canonical.com> (raw) From: Colin Ian King <colin.king@canonical.com> 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> --- V2: move error exit label and remove a return statement, thanks to Walter Harms for spotting this clean up. V3: simplify, just bail out and return on detecting the out of memory condition --- drivers/rtc/rtc-ds1307.c | 2 ++ 1 file changed, 2 insertions(+) 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; -- 2.25.1
next reply other threads:[~2020-04-03 11:05 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-04-03 11:04 Colin King [this message] 2020-04-03 11:04 ` [PATCH][next][V3] rtc: ds1307: check for failed memory allocation on wdt Colin King 2020-04-03 11:40 ` Alexandre Belloni 2020-04-03 11:40 ` Alexandre Belloni
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