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s390/bpf,jit: initialize A register if 1st insn is BPF_S_LDX_B_MSH
authorMartin Schwidefsky <schwidefsky@de.ibm.com>
Fri, 25 Apr 2014 08:53:44 +0000 (10:53 +0200)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Fri, 25 Apr 2014 12:03:25 +0000 (14:03 +0200)
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>
arch/s390/net/bpf_jit_comp.c patch | blob | history

diff --cc arch/s390/net/bpf_jit_comp.c
Simple merge
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