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| author | silby <silby@FreeBSD.org> | 2003-10-19 22:33:41 +0000 |
|---|---|---|
| committer | silby <silby@FreeBSD.org> | 2003-10-19 22:33:41 +0000 |
| commit | 4add8d9302f95e90df2c7b01613648b4f8c2a8a7 (patch) | |
| tree | 380a9f5bd024e0fdbc9f53870898d9246166b4c0 /sys/net/bpf.h | |
| parent | 9f420bf43d995bad7e87dd407faafcddbe12d343 (diff) | |
| download | FreeBSD-src-4add8d9302f95e90df2c7b01613648b4f8c2a8a7.zip FreeBSD-src-4add8d9302f95e90df2c7b01613648b4f8c2a8a7.tar.gz | |
Add a new macro M_ASSERTVALID which ensures that the mbuf in question
is non-free. (More checks can/should be added in the future.)
Use M_ASSERTVALID in BPF_MTAP so that we catch when freed mbufs are
passed in, even if no bpf listeners are active.
Inspired by a bug in if_dc caught by Kenjiro Cho.
Diffstat (limited to 'sys/net/bpf.h')
| -rw-r--r-- | sys/net/bpf.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/net/bpf.h b/sys/net/bpf.h index 6d3e800..a5942ae 100644 --- a/sys/net/bpf.h +++ b/sys/net/bpf.h @@ -366,6 +366,7 @@ u_int bpf_filter(const struct bpf_insn *, u_char *, u_int, u_int); bpf_tap((_ifp)->if_bpf, (_pkt), (_pktlen)); \ } while (0) #define BPF_MTAP(_ifp,_m) do { \ + M_ASSERTVALID(_m); \ if ((_ifp)->if_bpf) \ bpf_mtap((_ifp)->if_bpf, (_m)); \ } while (0) |
