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| author | dillon <dillon@FreeBSD.org> | 1998-12-12 21:45:49 +0000 |
|---|---|---|
| committer | dillon <dillon@FreeBSD.org> | 1998-12-12 21:45:49 +0000 |
| commit | 21b42c731e9d4dd0805ce9d50ac827a8ae7efe25 (patch) | |
| tree | 6bfd629c156a29420a22ebfb2f657cbf1de57564 | |
| parent | b9c991f4868ca0e7c01e203ee7261d0064d5d013 (diff) | |
| download | FreeBSD-src-21b42c731e9d4dd0805ce9d50ac827a8ae7efe25.zip FreeBSD-src-21b42c731e9d4dd0805ce9d50ac827a8ae7efe25.tar.gz | |
PR: kern/8990
If timer calculation results in degenerate value (0), force it to 1
to avoid divide-by-zero panic later on in calls to IGMP_RANDOM_DELAY().
I considered simply adding 1 to the timer calculation, but was unsure
if the calculation was part of the IGMP standard or not so did not want
to mess with it for all cases.
| -rw-r--r-- | sys/netinet/igmp.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/netinet/igmp.c b/sys/netinet/igmp.c index 8a4bd85..713be24 100644 --- a/sys/netinet/igmp.c +++ b/sys/netinet/igmp.c @@ -35,7 +35,7 @@ * SUCH DAMAGE. * * @(#)igmp.c 8.1 (Berkeley) 7/19/93 - * $Id: igmp.c,v 1.24 1997/10/11 18:31:31 phk Exp $ + * $Id: igmp.c,v 1.25 1997/10/12 20:25:21 phk Exp $ */ /* @@ -198,6 +198,8 @@ igmp_input(m, iphlen) ip = mtod(m, struct ip *); timer = igmp->igmp_code * PR_FASTHZ / IGMP_TIMER_SCALE; + if (timer == 0) + timer = 1; rti = find_rti(ifp); /* |
