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Message-Id: <1360015899-13706-1-git-send-email-dinggnu@gmail.com> Date: Mon, 4 Feb 2013 23:11:36 +0100 From: Cong Ding <dinggnu@...il.com> To: Wolfram Sang <w.sang@...gutronix.de>, Andrew Morton <akpm@...ux-foundation.org>, Karol Lewandowski <k.lewandowsk@...sung.com>, Kyungmin Park <kyungmin.park@...sung.com>, Haojian Zhuang <haojian.zhuang@...vell.com>, linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org Cc: Cong Ding <dinggnu@...il.com> Subject: [PATCH] i2c: busses/i2c-pxa.c: fix potential null pointer dereference error If it goes to eclk through line 1107, the variable res would be NULL. It will cause a null pointer dereference error if we call release_mem_region. Signed-off-by: Cong Ding <dinggnu@...il.com> --- drivers/i2c/busses/i2c-pxa.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c index 1034d93..eadf1a4 100644 --- a/drivers/i2c/busses/i2c-pxa.c +++ b/drivers/i2c/busses/i2c-pxa.c @@ -1211,7 +1211,8 @@ eremap: eclk: kfree(i2c); emalloc: - release_mem_region(res->start, resource_size(res)); + if (!res) + release_mem_region(res->start, resource_size(res)); return ret; } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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