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tipc: fix a missing check of genlmsg_put
[ Upstream commit 46273cf7e0
]
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>
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@ -983,6 +983,8 @@ static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
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hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
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TIPC_NL_PUBL_GET);
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if (!hdr)
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return -EMSGSIZE;
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nest = nla_nest_start(args, TIPC_NLA_SOCK);
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if (!nest) {
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