From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Fri, 25 Apr 2014 08:53:44 +0000 (+0200)
Subject: s390/bpf,jit: initialize A register if 1st insn is BPF_S_LDX_B_MSH
X-Git-Tag: omap-for-v3.16/pm-signed~21^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6e0de817594c61f3b392a9245deeb09609ec707d;p=pandora-kernel.git

s390/bpf,jit: initialize A register if 1st insn is BPF_S_LDX_B_MSH

The A register needs to be initialized to zero in the prolog if the
first instruction of the BPF program is BPF_S_LDX_B_MSH to prevent
leaking the content of %r5 to user space.

Cc: <stable@vger.kernel.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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