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| author | David Howells <dhowells@redhat.com> | 2019-09-02 11:43:44 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2019-09-02 11:43:44 +0100 |
| commit | f16180739cd18a39a1a45516ac0e65d18a9f100e (patch) | |
| tree | 22d1135650f8ddb25707c788cd4846c77b428ff0 /kernel/bpf/core.c | |
| parent | 9f159ae07f07fc540290f21937231034f554bdd7 (diff) | |
| parent | e1e54ec7fb55501c33b117c111cb0a045b8eded2 (diff) | |
| download | kernel_replicant_linux-f16180739cd18a39a1a45516ac0e65d18a9f100e.tar.gz kernel_replicant_linux-f16180739cd18a39a1a45516ac0e65d18a9f100e.tar.bz2 kernel_replicant_linux-f16180739cd18a39a1a45516ac0e65d18a9f100e.zip | |
Merge remote-tracking branch 'net/master' into afs-next
Diffstat (limited to 'kernel/bpf/core.c')
| -rw-r--r-- | kernel/bpf/core.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index 8191a7db2777..66088a9e9b9e 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -890,7 +890,8 @@ int bpf_jit_get_func_addr(const struct bpf_prog *prog, static int bpf_jit_blind_insn(const struct bpf_insn *from, const struct bpf_insn *aux, - struct bpf_insn *to_buff) + struct bpf_insn *to_buff, + bool emit_zext) { struct bpf_insn *to = to_buff; u32 imm_rnd = get_random_int(); @@ -1005,6 +1006,8 @@ static int bpf_jit_blind_insn(const struct bpf_insn *from, case 0: /* Part 2 of BPF_LD | BPF_IMM | BPF_DW. */ *to++ = BPF_ALU32_IMM(BPF_MOV, BPF_REG_AX, imm_rnd ^ aux[0].imm); *to++ = BPF_ALU32_IMM(BPF_XOR, BPF_REG_AX, imm_rnd); + if (emit_zext) + *to++ = BPF_ZEXT_REG(BPF_REG_AX); *to++ = BPF_ALU64_REG(BPF_OR, aux[0].dst_reg, BPF_REG_AX); break; @@ -1088,7 +1091,8 @@ struct bpf_prog *bpf_jit_blind_constants(struct bpf_prog *prog) insn[1].code == 0) memcpy(aux, insn, sizeof(aux)); - rewritten = bpf_jit_blind_insn(insn, aux, insn_buff); + rewritten = bpf_jit_blind_insn(insn, aux, insn_buff, + clone->aux->verifier_zext); if (!rewritten) continue; |