This is a note to let you know that I've just added the patch titled
s390/bpf,jit: initialize A register if 1st insn is BPF_S_LDX_B_MSH
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
s390-bpf-jit-initialize-a-register-if-1st-insn-is-bpf_s_ldx_b_msh.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6e0de817594c61f3b392a9245deeb09609ec707d Mon Sep 17 00:00:00 2001
From: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Date: Fri, 25 Apr 2014 10:53:44 +0200
Subject: s390/bpf,jit: initialize A register if 1st insn is BPF_S_LDX_B_MSH
From: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/s390/net/bpf_jit_comp.c | 1 -
1 file changed, 1 deletion(-)
--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -276,7 +276,6 @@ static void bpf_jit_noleaks(struct bpf_j
case BPF_S_LD_W_IND:
case BPF_S_LD_H_IND:
case BPF_S_LD_B_IND:
- case BPF_S_LDX_B_MSH:
case BPF_S_LD_IMM:
case BPF_S_LD_MEM:
case BPF_S_MISC_TXA:
Patches currently in stable-queue which might be from schwidefsky@xxxxxxxxxx are
queue-3.14/s390-bpf-jit-initialize-a-register-if-1st-insn-is-bpf_s_ldx_b_msh.patch
queue-3.14/s390-chsc-fix-sei-usage-on-old-fw-levels.patch
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