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bpf: arm64: fix BPF_ST into arena memory #6259

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bpf: arm64: fix BPF_ST into arena memory #6259

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5 changes: 3 additions & 2 deletions arch/arm64/net/bpf_jit_comp.c
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Original file line number Diff line number Diff line change
Expand Up @@ -785,6 +785,7 @@ static int emit_lse_atomic(const struct bpf_insn *insn, struct jit_ctx *ctx)
const u8 src = bpf2a64[insn->src_reg];
const u8 tmp = bpf2a64[TMP_REG_1];
const u8 tmp2 = bpf2a64[TMP_REG_2];
const u8 tmp3 = bpf2a64[TMP_REG_3];
const bool isdw = BPF_SIZE(code) == BPF_DW;
const bool arena = BPF_MODE(code) == BPF_PROBE_ATOMIC;
const s16 off = insn->off;
Expand Down Expand Up @@ -1757,8 +1758,8 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx,
case BPF_ST | BPF_PROBE_MEM32 | BPF_W:
case BPF_ST | BPF_PROBE_MEM32 | BPF_DW:
if (BPF_MODE(insn->code) == BPF_PROBE_MEM32) {
emit(A64_ADD(1, tmp2, dst, arena_vm_base), ctx);
dst = tmp2;
emit(A64_ADD(1, tmp3, dst, arena_vm_base), ctx);
dst = tmp3;
}
if (dst == fp) {
dst_adj = ctx->priv_sp_used ? priv_sp : A64_SP;
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