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sctp: fix handling of RTO.initial of 1 ms

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MFC after:	3 days
Reported by:	syzbot+5eb0e009147050056ce9@syzkaller.appspotmail.com
This commit is contained in:
Michael Tuexen 2021-03-22 16:40:41 +01:00
parent 048488c0c4
commit d995cc7e54
1 changed files with 3 additions and 1 deletions
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4
sys/netinet/sctputil.c
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@ -2277,7 +2277,9 @@ sctp_timer_start(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
}
rndval = sctp_select_initial_TSN(&inp->sctp_ep);
jitter = rndval % to_ticks;
to_ticks >>= 1;
if (to_ticks > 1) {
to_ticks >>= 1;
}
if (jitter < (UINT32_MAX - to_ticks)) {
to_ticks += jitter;
} else {