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    Subject[PATCH 3.16 119/366] netlink: fix uninit-value in netlink_sendmsg
    3.16.60-rc1 review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Eric Dumazet <edumazet@google.com>

    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: 1da177e4c3f4 ("Linux-2.6.12-rc2")
    Signed-off-by: Eric Dumazet <edumazet@google.com>
    Reported-by: syzbot <syzkaller@googlegroups.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
    ---
    net/netlink/af_netlink.c | 2 ++
    1 file changed, 2 insertions(+)

    --- a/net/netlink/af_netlink.c
    +++ b/net/netlink/af_netlink.c
    @@ -1658,6 +1658,8 @@ static int netlink_sendmsg(struct kiocb

    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;
    \
     
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