[PATCH v2 08/10] powerpc/bpf ppc32: Fix JMP32_JSET_K
From: Naveen N. Rao <hidden>
Date: 2021-10-05 20:26:58
Also in:
bpf
Subsystem:
bpf jit for powerpc (32-bit and 64-bit), bpf [general] (safe dynamic programs and tools), linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Hari Bathini, Christophe Leroy, Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Madhavan Srinivasan, Linus Torvalds
'andi' only takes an unsigned 16-bit value. Correct the imm range used
when emitting andi.
Fixes: 51c66ad849a703 ("powerpc/bpf: Implement extended BPF on PPC32")
Signed-off-by: Naveen N. Rao <redacted>
---
arch/powerpc/net/bpf_jit_comp32.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/net/bpf_jit_comp32.c b/arch/powerpc/net/bpf_jit_comp32.c
index 519ecb9ab67266..7c65de9ed4fa64 100644
--- a/arch/powerpc/net/bpf_jit_comp32.c
+++ b/arch/powerpc/net/bpf_jit_comp32.c@@ -1075,7 +1075,7 @@ int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, struct codegen_context * break; case BPF_JMP32 | BPF_JSET | BPF_K: /* andi does not sign-extend the immediate */ - if (imm >= -32768 && imm < 32768) { + if (imm >= 0 && imm < 32768) { /* PPC_ANDI is _only/always_ dot-form */ EMIT(PPC_RAW_ANDI(_R0, dst_reg, imm)); } else {
--
2.33.0