From: Wang Hai wanghai38@huawei.com
[ Upstream commit e33de7c5317e2827b2ba6fd120a505e9eb727b05 ]
nlmsg_cancel() needs to be called in the error path of inet_req_diag_fill to cancel the message.
Fixes: d545caca827b ("net: inet: diag: expose the socket mark to privileged processes.") Reported-by: Hulk Robot hulkci@huawei.com Signed-off-by: Wang Hai wanghai38@huawei.com Link: https://lore.kernel.org/r/20201116082018.16496-1-wanghai38@huawei.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/ipv4/inet_diag.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/net/ipv4/inet_diag.c +++ b/net/ipv4/inet_diag.c @@ -388,8 +388,10 @@ static int inet_req_diag_fill(struct soc r->idiag_inode = 0;
if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, - inet_rsk(reqsk)->ir_mark)) + inet_rsk(reqsk)->ir_mark)) { + nlmsg_cancel(skb, nlh); return -EMSGSIZE; + }
nlmsg_end(skb, nlh); return 0;