git: 44851ff2f65d - stable/12 - igmp: Avoid leaking mbuf when source validation fails

[Mark Johnston]

The branch stable/12 has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=44851ff2f65de3bdf3b3fa469a7bb5546e77e170

commit 44851ff2f65de3bdf3b3fa469a7bb5546e77e170
Author:     Mark Johnston <markj at FreeBSD.org>
AuthorDate: 2021-01-08 18:32:04 +0000
Commit:     Mark Johnston <markj at FreeBSD.org>
CommitDate: 2021-01-11 14:41:55 +0000

    igmp: Avoid leaking mbuf when source validation fails
    
    PR:             252504
    Submitted by:   Panagiotis Tsolakos <panagiotis.tsolakos at gmail.com>
    
    (cherry picked from commit 501159696cb5204d94d03393e4bc5d82f2e348e6)
---
 sys/netinet/igmp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/netinet/igmp.c b/sys/netinet/igmp.c
index 6f35f8156d23..a68a5a1ca9dd 100644
--- a/sys/netinet/igmp.c
+++ b/sys/netinet/igmp.c
@@ -1533,6 +1533,7 @@ igmp_input(struct mbuf **mp, int *offp, int proto)
 				if (nsrc * sizeof(in_addr_t) >
 				    UINT16_MAX - iphlen - IGMP_V3_QUERY_MINLEN) {
 					IGMPSTAT_INC(igps_rcv_tooshort);
+					m_freem(m);
 					return (IPPROTO_DONE);
 				}
 				/*