diff options
| author | Eric Dumazet <edumazet@google.com> | 2018-04-07 23:42:37 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-16 11:06:50 +0300 |
| commit | bab5c357a16e77db86e5f681236065af609896a1 (patch) | |
| tree | 422380120b4bf5f1e059789b7757c9586ac80f38 | |
| parent | 83231e0aae2c6bca967dbd05b0966908e908a036 (diff) | |
| download | linux-bab5c357a16e77db86e5f681236065af609896a1.tar.xz | |
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>
| -rw-r--r-- | net/netlink/af_netlink.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index 98fe9691337c..818400fddc9b 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1795,6 +1795,8 @@ static int netlink_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) 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; |