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(parent: 506841a) | patch
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)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 13 May 2014 11:59:42 +0000 (13:59 +0200)
commit6eed5b7500dc3754dc4d24f328f02bed118adb89
treededaa58dc12d8e2d6e64782b3b184e4665c8b952tree
parent506841af86605c1d44df1d45ab271c69dcf46b70commit | diff
s390/bpf,jit: initialize A register if 1st insn is BPF_S_LDX_B_MSH

commit 6e0de817594c61f3b392a9245deeb09609ec707d upstream.

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.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/s390/net/bpf_jit_comp.c diff | blob | history
Intel Edison kernel - building x86_64 support