diff options
| author |   Herbert Xu <herbert@gondor.apana.org.au> | 2015-06-19 22:07:07 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-06-19 22:07:07 +0800 |
| commit | c0b59fafe31bf91f589736be304d739b13952fdd (patch) | |
| tree | 0088a41c6b68132739294643be06734e3af67677 /kernel/bpf/verifier.c | |
| parent | MAINTAINERS: clarify drivers/crypto/nx/ file ownership (diff) | |
| parent | bus: mvebu-mbus: add mv_mbus_dram_info_nooverlap() (diff) | |
| download | linux-dev-c0b59fafe31bf91f589736be304d739b13952fdd.tar.xz linux-dev-c0b59fafe31bf91f589736be304d739b13952fdd.zip | |
Merge branch 'mvebu/drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Merge the mvebu/drivers branch of the arm-soc tree which contains
just a single patch bfa1ce5f38938cc9e6c7f2d1011f88eba2b9e2b2 ("bus:
mvebu-mbus: add mv_mbus_dram_info_nooverlap()") that happens to be
a prerequisite of the new marvell/cesa crypto driver.
Diffstat (limited to 'kernel/bpf/verifier.c')
| -rw-r--r-- | kernel/bpf/verifier.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 630a7bac1e51..47dcd3aa6e23 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -1397,7 +1397,8 @@ peek_stack: /* tell verifier to check for equivalent states * after every call and jump */ - env->explored_states[t + 1] = STATE_LIST_MARK; + if (t + 1 < insn_cnt) + env->explored_states[t + 1] = STATE_LIST_MARK; } else { /* conditional jump with two edges */ ret = push_insn(t, t + 1, FALLTHROUGH, env); @@ -1636,6 +1637,8 @@ static int do_check(struct verifier_env *env) if (err) return err; + src_reg_type = regs[insn->src_reg].type; + /* check that memory (src_reg + off) is readable, * the state of dst_reg will be updated by this func */ @@ -1645,9 +1648,12 @@ static int do_check(struct verifier_env *env) if (err) return err; - src_reg_type = regs[insn->src_reg].type; + if (BPF_SIZE(insn->code) != BPF_W) { + insn_idx++; + continue; + } - if (insn->imm == 0 && BPF_SIZE(insn->code) == BPF_W) { + if (insn->imm == 0) { /* saw a valid insn * dst_reg = *(u32 *)(src_reg + off) * use reserved 'imm' field to mark this insn |