diff options
Diffstat (limited to 'bpf_filter.c')
| -rw-r--r-- | bpf_filter.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/bpf_filter.c b/bpf_filter.c index e5c286b5..b19b25d1 100644 --- a/bpf_filter.c +++ b/bpf_filter.c @@ -302,11 +302,17 @@ pcap_filter_with_aux_data(const struct bpf_insn *pc, const u_char *p, continue; case BPF_ALU|BPF_LSH|BPF_X: - A <<= X; + if (X < 32) + A <<= X; + else + A = 0; continue; case BPF_ALU|BPF_RSH|BPF_X: - A >>= X; + if (X < 32) + A >>= X; + else + A = 0; continue; case BPF_ALU|BPF_ADD|BPF_K: |