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tipc: fix a missing check of genlmsg_put
author
Kangjie Lu
<kjlu@umn.edu>
Wed, 26 Dec 2018 06:09:04 +0000
(
00:09
-0600)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Thu, 5 Dec 2019 14:37:50 +0000
(15:37 +0100)
[ 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>
net/tipc/netlink_compat.c
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diff --git
a/net/tipc/netlink_compat.c
b/net/tipc/netlink_compat.c
index 1c8ac0c11008c753729c768ab42ef9c4074facdc..91d51a595ac23bb9383a31ce6aa05b20af071bf5 100644
(file)
--- a/
net/tipc/netlink_compat.c
+++ b/
net/tipc/netlink_compat.c
@@
-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) {