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Commit 24e7995f authored by Eric Dumazet's avatar Eric Dumazet Committed by Greg Kroah-Hartman
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netlink: fix uninit-value in netlink_sendmsg 



commit 6091f09c2f79730d895149bcfe3d66140288cd0e upstream.

syzbot reported :

BUG: KMSAN: uninit-value in ffs arch/x86/include/asm/bitops.h:432 [inline]
BUG: KMSAN: uninit-value in netlink_sendmsg+0xb26/0x1310 net/netlink/af_netlink.c:1851

Fixes: 1da177e4 ("Linux-2.6.12-rc2")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Reported-by: default avatarsyzbot <syzkaller@googlegroups.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7c6b9b50

net/netlink/af_netlink.c

+2 −0
Original line number Diff line number Diff line
@@ -1641,6 +1641,8 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock, 


	if (msg->msg_namelen) {

		err = -EINVAL;

		if (msg->msg_namelen < sizeof(struct sockaddr_nl))

			goto out;

		if (addr->nl_family != AF_NETLINK)

			goto out;

		dst_portid = addr->nl_pid;