Author: emaste
Date: Wed Jul 24 16:51:14 2019
New Revision: 350294
URL: https://svnweb.freebsd.org/changeset/base/350294
Log:
pf: zero output buffer in pfioctl
Avoid potential structure padding leak.
Reported by: Vlad Tsyrklevich <v...@tsyrklevich.net>
Reviewed by: kp
MFC after: 3 days
Security: Potential kernel memory disclosure
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/netpfil/pf/pf_ioctl.c
Modified: head/sys/netpfil/pf/pf_ioctl.c
==============================================================================
--- head/sys/netpfil/pf/pf_ioctl.c Wed Jul 24 16:10:20 2019
(r350293)
+++ head/sys/netpfil/pf/pf_ioctl.c Wed Jul 24 16:51:14 2019
(r350294)
@@ -2169,7 +2169,7 @@ relock_DIOCKILLSTATES:
break;
}
- p = pstore = malloc(ps->ps_len, M_TEMP, M_WAITOK);
+ p = pstore = malloc(ps->ps_len, M_TEMP, M_WAITOK | M_ZERO);
nr = 0;
for (i = 0; i <= pf_hashmask; i++) {
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