[Bug 254478] Panic when using ipfw and divert sockets

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254478

--- Comment #12 from karl@denninger.net ---
(In reply to Jack from comment #11)

Same bug. 

Hotfix here will stop it (note this is 12.2-STABLE, may be slightly different
offsets in 13+); I have roughly a day on it now with no panic and previously it
was blowing up within minutes:

[karl@NewFS /usr/src]$ git diff .
diff --git a/sys/netinet/libalias/alias_db.c b/sys/netinet/libalias/alias_db.c
index 783a8ca3baa..45faf5a2a40 100644
--- a/sys/netinet/libalias/alias_db.c
+++ b/sys/netinet/libalias/alias_db.c
@@ -1769,7 +1769,8 @@ HouseKeeping(struct libalias *la)
         * Reduce the amount of house keeping work substantially by
         * sampling over the packets.
         */
-       if (packets % packet_limit == 0) {
+       if (packet_limit == 0 || packets % packet_limit == 0) {
+/*     if (packets % packet_limit == 0) {      */
                time_t now;

 #ifdef _KERNEL

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