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authorNicolas Schichan <nschichan@freebox.fr>2018-12-19 22:40:42 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-12-21 14:13:18 +0100
commitad962d20d4eb1e690ace8ca9e390e2b05a786999 (patch)
treeb137316c82f5ca37aebeb48c14c6dce48a81d3ec
parentf1e1eb5c90b6b6a359e584e01468ce0c05801f4d (diff)
bpf, arm: fix emit_ldx_r and emit_mov_i using TMP_REG_1
emit_ldx_r() and emit_a32_mov_i() were both using TMP_REG_1 and clashing with each other. Using TMP_REG_2 in emit_ldx_r() fixes the issue. Fixes: ec19e02b343 ("ARM: net: bpf: fix LDX instructions") Cc: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Nicolas Schichan <nschichan@freebox.fr> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
-rw-r--r--arch/arm/net/bpf_jit_32.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/net/bpf_jit_32.c b/arch/arm/net/bpf_jit_32.c
index ece2d1d43724..dafeb5f81353 100644
--- a/arch/arm/net/bpf_jit_32.c
+++ b/arch/arm/net/bpf_jit_32.c
@@ -915,7 +915,7 @@ static inline void emit_str_r(const u8 dst, const u8 src, bool dstk,
/* dst = *(size*)(src + off) */
static inline void emit_ldx_r(const u8 dst[], const u8 src, bool dstk,
s32 off, struct jit_ctx *ctx, const u8 sz){
- const u8 *tmp = bpf2a32[TMP_REG_1];
+ const u8 *tmp = bpf2a32[TMP_REG_2];
const u8 *rd = dstk ? tmp : dst;
u8 rm = src;
s32 off_max;