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tipc: fix a missing check of genlmsg_put

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[ Upstream commit 46273cf7e009231d2b6bc10a926e82b8928a9fb2 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kangjie Lu 2018-12-26 00:09:04 -06:00 committed by Greg Kroah-Hartman
parent a4bc476bd0
commit 709f50b180
1 changed files with 2 additions and 0 deletions
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2
net/tipc/netlink_compat.c
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@ -974,6 +974,8 @@ 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) {