From: Shuah Khan <shuahkh@osg.samsung.com>
Date: Tue, 11 Nov 2014 17:04:13 +0000 (-0700)
Subject: selftests/net: psock_fanout seg faults in sock_fanout_read_ring()
X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~119^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fbf8e7211ac7858d3df4a4203c18da7a58560784;p=pandora-kernel.git

selftests/net: psock_fanout seg faults in sock_fanout_read_ring()

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@osg.samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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