From: Kangjie Lu <kjlu@umn.edu>
Date: Wed, 26 Dec 2018 06:09:04 +0000 (-0600)
Subject: tipc: fix a missing check of genlmsg_put
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=46273cf7e009231d2b6bc10a926e82b8928a9fb2;p=linux.git

tipc: fix a missing check of genlmsg_put

genlmsg_put could fail. The fix inserts a check of its return value, and
if it fails, returns -EMSGSIZE.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c
index 21f6ccc894019..40f5cae623a77 100644
--- a/net/tipc/netlink_compat.c
+++ b/net/tipc/netlink_compat.c
@@ -904,6 +904,8 @@ static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
 
 	hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
 			  TIPC_NL_PUBL_GET);
+	if (!hdr)
+		return -EMSGSIZE;
 
 	nest = nla_nest_start(args, TIPC_NLA_SOCK);
 	if (!nest) {