diff options
Diffstat (limited to 'pcap-linux.c')
| -rw-r--r-- | pcap-linux.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/pcap-linux.c b/pcap-linux.c index ed80b2da..31c1a6a0 100644 --- a/pcap-linux.c +++ b/pcap-linux.c @@ -7496,6 +7496,14 @@ fix_program(pcap_t *handle, struct sock_fprog *fcode, int is_mmapped) static int fix_offset(pcap_t *handle, struct bpf_insn *p) { + /* + * Existing references to auxiliary data shouldn't be adjusted. + * + * Note that SKF_AD_OFF is negative, but p->k is unsigned, so + * we use >= and cast SKF_AD_OFF to unsigned. + */ + if (p->k >= (bpf_u_int32)SKF_AD_OFF) + return 0; if (handle->linktype == DLT_LINUX_SLL2) { /* * What's the offset? |