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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2014-04-25 10:53:44 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2014-04-25 14:03:25 +0200
commit6e0de817594c61f3b392a9245deeb09609ec707d (patch)
tree43eab06f874cef545dd9c116379af3c02dcf55d5 /arch/s390/net
parent06cd7a874ec6e09d151aeb1fa8600e14f1ff89f6 (diff)
downloadlinux-6e0de817594c61f3b392a9245deeb09609ec707d.tar.gz
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>
Diffstat (limited to 'arch/s390/net')
-rw-r--r--arch/s390/net/bpf_jit_comp.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
index 9c36dc398f90..452d3ebd9d0f 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: