svn commit: r360609 - head/sys/netpfil/pf
Kristof Provost
kp at FreeBSD.org
Sun May 3 16:09:35 UTC 2020
Author: kp
Date: Sun May 3 16:09:35 2020
New Revision: 360609
URL: https://svnweb.freebsd.org/changeset/base/360609
Log:
pf: Improve DIOCADDRULE validation
We expect the addrwrap.p.dyn value to be set to NULL (and assert such),
but do not verify it on input.
Reported-by: syzbot+936a89182e7d8f927de1 at syzkaller.appspotmail.com
Reviewed by: melifaro (previous version)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D24538
Modified:
head/sys/netpfil/pf/pf_ioctl.c
Modified: head/sys/netpfil/pf/pf_ioctl.c
==============================================================================
--- head/sys/netpfil/pf/pf_ioctl.c Sun May 3 16:06:23 2020 (r360608)
+++ head/sys/netpfil/pf/pf_ioctl.c Sun May 3 16:09:35 2020 (r360609)
@@ -1556,6 +1556,11 @@ pfioctl(struct cdev *dev, u_long cmd, caddr_t addr, in
error = EINVAL;
break;
}
+ if (pr->rule.src.addr.p.dyn != NULL ||
+ pr->rule.dst.addr.p.dyn != NULL) {
+ error = EINVAL;
+ break;
+ }
#ifndef INET
if (pr->rule.af == AF_INET) {
error = EAFNOSUPPORT;
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