linux-kernel - Re: [PATCH] selftests/net: psock_fanout seg faults in sock_fanout_read

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Message-Id: <20141111.214402.693686900755542775.davem@davemloft.net>
Date:	Tue, 11 Nov 2014 21:44:02 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	shuahkh@....samsung.com
Cc:	netdev@...r.kernel.org, linux-api@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] selftests/net: psock_fanout seg faults in
 sock_fanout_read_ring()

From: Shuah Khan <shuahkh@....samsung.com>
Date: Tue, 11 Nov 2014 10:04:13 -0700

> The while loop in sock_fanout_read_ring() checks mmap region
> bounds after access, causing it to segfault. Fix it to check
> count before accessing header->tp_status. This problem can be
> reproduced consistently when the test in run as follows:
> 
>     make -C tools/testing/selftests TARGETS=net run_tests
>     or
>     make run_tests from tools/testing/selftests
>     or
>     make run_test from tools/testing/selftests/net
> 
> Signed-off-by: Shuah Khan <shuahkh@....samsung.com>

Definitely looks correct to me, applied, thanks.
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