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Message-Id: <ad5902892ae2777b29abaaedfa2e430ccd584f0c.1399973152.git.jslaby@suse.cz> Date: Tue, 13 May 2014 11:28:10 +0200 From: Jiri Slaby <jslaby@...e.cz> To: stable@...r.kernel.org Cc: linux-kernel@...r.kernel.org, Martin Schwidefsky <schwidefsky@...ibm.com>, Jiri Slaby <jslaby@...e.cz> Subject: [PATCH 3.12 138/182] s390/bpf,jit: initialize A register if 1st insn is BPF_S_LDX_B_MSH From: Martin Schwidefsky <schwidefsky@...ibm.com> 3.12-stable review patch. If anyone has any objections, please let me know. =============== 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@...ibm.com> Signed-off-by: Jiri Slaby <jslaby@...e.cz> --- arch/s390/net/bpf_jit_comp.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c index 96a4b150f958..906fba63b66d 100644 --- 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_jit *jit, struct sock_filter *filter) 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: -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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