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| author | Daniel Borkmann <daniel@iogearbox.net> | 2017-06-11 00:50:43 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-06-10 19:05:45 -0400 |
| commit | 36e24c003091a11ec847291c9a1d36d2ec92b155 (patch) | |
| tree | f9fa3bc275aeb97f131a5e0ed1a3207f8d69565f | |
| parent | 4a2ff55aa4946b036b87572976cbfc6ab244c497 (diff) | |
| download | linux-36e24c003091a11ec847291c9a1d36d2ec92b155.tar.bz2 | |
bpf: reset id on spilled regs in clear_all_pkt_pointers
Right now, we don't reset the id of spilled registers in case of
clear_all_pkt_pointers(). Given pkt_pointers are highly likely to
contain an id, do so by reusing __mark_reg_unknown_value().
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | kernel/bpf/verifier.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index d195d825515a..519a6144d3d3 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -1346,8 +1346,8 @@ static void clear_all_pkt_pointers(struct bpf_verifier_env *env) if (reg->type != PTR_TO_PACKET && reg->type != PTR_TO_PACKET_END) continue; - reg->type = UNKNOWN_VALUE; - reg->imm = 0; + __mark_reg_unknown_value(state->spilled_regs, + i / BPF_REG_SIZE); } } |