diff options
| author | Alexander Bluhm <bluhm@cvs.openbsd.org> | 2019-05-24 15:17:30 +0000 |
|---|---|---|
| committer | Alexander Bluhm <bluhm@cvs.openbsd.org> | 2019-05-24 15:17:30 +0000 |
| commit | b990887ef6bf3e4d74b55db04309b63a63ee2956 (patch) | |
| tree | d138f80038612745936c381de5890eb1253bab69 /sys/kern | |
| parent | 7edb57900445177b320ba3f2999e1e2549e224f2 (diff) | |
Prevent a kernel hang if an empty message is sent over an SOCK_SEQPACKET
socketpair. Do not wakeup receiver if there is no data available.
OK claudio@ anton@
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/uipc_usrreq.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sys/kern/uipc_usrreq.c b/sys/kern/uipc_usrreq.c index 6444de09019..09fd1bbf77b 100644 --- a/sys/kern/uipc_usrreq.c +++ b/sys/kern/uipc_usrreq.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uipc_usrreq.c,v 1.139 2019/02/13 11:55:21 martijn Exp $ */ +/* $OpenBSD: uipc_usrreq.c,v 1.140 2019/05/24 15:17:29 bluhm Exp $ */ /* $NetBSD: uipc_usrreq.c,v 1.18 1996/02/09 19:00:50 christos Exp $ */ /* @@ -267,7 +267,8 @@ uipc_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, sbappend(so2, &so2->so_rcv, m); so->so_snd.sb_mbcnt = so2->so_rcv.sb_mbcnt; so->so_snd.sb_cc = so2->so_rcv.sb_cc; - sorwakeup(so2); + if (so2->so_rcv.sb_cc > 0) + sorwakeup(so2); m = NULL; break; |