From: Cong Ding <dinggnu-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Kyungmin Park <kmpark-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: Wolfram Sang <w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Karol Lewandowski
<k.lewandowsk-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
Haojian Zhuang
<haojian.zhuang-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH v2] i2c: busses/i2c-pxa.c: fix potential null pointer dereference error
Date: Tue, 5 Feb 2013 01:05:17 +0100 [thread overview]
Message-ID: <20130205000517.GB9969@gmail.com> (raw)
In-Reply-To: <CAH9JG2XSpFJeUvv7cw-JWadmi=X0-4EsN5FFKuDkwo=-mmzHSQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
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-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
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..00df535 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
WARNING: multiple messages have this Message-ID (diff)
From: Cong Ding <dinggnu@gmail.com>
To: Kyungmin Park <kmpark@infradead.org>
Cc: Wolfram Sang <w.sang@pengutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Karol Lewandowski <k.lewandowsk@samsung.com>,
Haojian Zhuang <haojian.zhuang@marvell.com>,
linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2] i2c: busses/i2c-pxa.c: fix potential null pointer dereference error
Date: Tue, 5 Feb 2013 01:05:17 +0100 [thread overview]
Message-ID: <20130205000517.GB9969@gmail.com> (raw)
In-Reply-To: <CAH9JG2XSpFJeUvv7cw-JWadmi=X0-4EsN5FFKuDkwo=-mmzHSQ@mail.gmail.com>
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@gmail.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..00df535 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
next prev parent reply other threads:[~2013-02-05 0:05 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-04 22:11 [PATCH] i2c: busses/i2c-pxa.c: fix potential null pointer dereference error Cong Ding
2013-02-04 22:11 ` Cong Ding
2013-02-04 23:47 ` Kyungmin Park
[not found] ` <CAH9JG2XSpFJeUvv7cw-JWadmi=X0-4EsN5FFKuDkwo=-mmzHSQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-02-05 0:03 ` Cong Ding
2013-02-05 0:03 ` Cong Ding
2013-02-05 0:05 ` Cong Ding [this message]
2013-02-05 0:05 ` [PATCH v2] " Cong Ding
[not found] ` <20130205000517.GB9969-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-02-05 1:14 ` Haojian Zhuang
2013-02-05 1:14 ` Haojian Zhuang
[not found] ` <CAN1soZwM6qNTJn3vvMdc6TR1eJHc=K+_c0WuWOBBuFYMWB_oCA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-02-05 10:25 ` Cong Ding
2013-02-05 10:25 ` Cong Ding
[not found] ` <20130205102540.GC9969-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-02-05 11:27 ` Haojian Zhuang
2013-02-05 11:27 ` Haojian Zhuang
2013-02-14 11:28 ` [PATCH v3] " Cong Ding
[not found] ` <20130214112818.GA18774-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-02-14 16:10 ` Haojian Zhuang
2013-02-14 16:10 ` Haojian Zhuang
2013-03-21 10:54 ` Wolfram Sang
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