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When sending a routing message, don't allow the user to set the

Browse Source 
RTF_RNH_LOCKED flag in rtm_flags, since this flag is used only
internally.

Reported by:		syzbot+65c676f5248a13753ea0@syzkaller.appspotmail.com
Reviewed by:		ae@
MFC after:		1 week
Differential Revision:	https://reviews.freebsd.org/D19898
This commit is contained in:
Michael Tuexen 2019-04-14 10:18:14 +00:00
parent b3d01a2ad7
commit e6481fd4c4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=346197
1 changed files with 2 additions and 0 deletions
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2
sys/net/rtsock.c
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@ -618,6 +618,8 @@ route_output(struct mbuf *m, struct socket *so, ...)
if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info))
senderr(EINVAL);
if (rtm->rtm_flags & RTF_RNH_LOCKED)
senderr(EINVAL);
info.rti_flags = rtm->rtm_flags;
if (info.rti_info[RTAX_DST] == NULL ||
info.rti_info[RTAX_DST]->sa_family >= AF_MAX ||