netlink: fix uninit-value in netlink_sendmsg
authorEric Dumazet <edumazet@google.com>
Sat, 7 Apr 2018 20:42:37 +0000 (13:42 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 16 May 2018 08:08:40 +0000 (10:08 +0200)
commit473ac55c5e036a73455bfbf5bf7b7bffeac4fa3d
treed8c58955328a295f2b6b3287ff6dd8b72de8facf
parent7b38b6dd316e5359c70fc11df7eb27825d4f3f15
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: 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
net/netlink/af_netlink.c