[PATCH 6.7 234/641] s390/bpf: Fix gotol with large offsets

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6.7-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>

[ Upstream commit ecba66cb36e3428e9f0c2362b45e213ad43ba8d0 ]

The gotol implementation uses a wrong data type for the offset: it
should be s32, not s16.

Fixes: c690191e23d8 ("s390/bpf: Implement unconditional jump with 32-bit offset")
Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
Acked-by: Yonghong Song <yonghong.song@xxxxxxxxx>
Acked-by: John Fastabend <john.fastabend@xxxxxxxxx>
Link: https://lore.kernel.org/r/20240102193531.3169422-2-iii@xxxxxxxxxxxxx
Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 arch/s390/net/bpf_jit_comp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
index bf06b7283f0c..c7fbeedeb0a4 100644
--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -779,7 +779,7 @@ static noinline int bpf_jit_insn(struct bpf_jit *jit, struct bpf_prog *fp,
 				 int i, bool extra_pass, u32 stack_depth)
 {
 	struct bpf_insn *insn = &fp->insnsi[i];
-	s16 branch_oc_off = insn->off;
+	s32 branch_oc_off = insn->off;
 	u32 dst_reg = insn->dst_reg;
 	u32 src_reg = insn->src_reg;
 	int last, insn_count = 1;
-- 
2.43.0







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