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authorJason Gunthorpe <jgg@mellanox.com>2019-09-12 12:49:56 -0300
committerJason Gunthorpe <jgg@mellanox.com>2019-09-13 16:59:51 -0300
commit75c66515e4fea4e9bb488b6125e014220f846c61 (patch)
treea7a79ca9a05da74fd3fd74b1c8c3e1cb2901c167 /kernel/bpf/core.c
parent1ba7c8f800586805c409f5b1ff1803318a41933a (diff)
parentf74c2bb98776e2de508f4d607cd519873065118e (diff)
downloadlinux-75c66515e4fea4e9bb488b6125e014220f846c61.tar.bz2
Merge tag 'v5.3-rc8' into rdma.git for-next
To resolve dependencies in following patches mlx5_ib.h conflict resolved by keeing both hunks Linux 5.3-rc8 Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'kernel/bpf/core.c')
-rw-r--r--kernel/bpf/core.c8
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;