git » linux-kernel » commit fa00e10

drivers/rtc/rtc-pcf50633.c: fix use after free in pcf50633_rtc_probe()

author Dan Carpenter
2009-12-01 21:17:41 UTC
committer Linus Torvalds
2009-12-02 00:32:19 UTC
parent 4c4cb1b1605e50983afd7924980c9434b214599f
drivers/rtc/rtc-pcf50633.c: fix use after free in pcf50633_rtc_probe()

"rtc" is freed and then dereferenced on the next line.  This patch fixes
that.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/rtc/rtc-pcf50633.c +2 -1 
diff --git a/drivers/rtc/rtc-pcf50633.c b/drivers/rtc/rtc-pcf50633.c
index 33a10c47260..4c5d5d0c4cf 100644
--- a/drivers/rtc/rtc-pcf50633.c
+++ b/drivers/rtc/rtc-pcf50633.c
@@ -292,8 +292,9 @@ static int __devinit pcf50633_rtc_probe(struct platform_device *pdev)
 				&pcf50633_rtc_ops, THIS_MODULE);
 
 	if (IS_ERR(rtc->rtc_dev)) {
+		int ret =  PTR_ERR(rtc->rtc_dev);
 		kfree(rtc);
-		return PTR_ERR(rtc->rtc_dev);
+		return ret;
 	}
 
 	pcf50633_register_irq(rtc->pcf, PCF50633_IRQ_ALARM,