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| author | Eric Dumazet <edumazet@google.com> | 2018-04-07 13:42:37 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-16 10:12:26 +0200 |
| commit | 4b016f0e749538bfebdfa5bea6aeebcd37ea9a0c (patch) | |
| tree | 33f1391bde1a54db97a2a1fabdad60dc8de70a52 /net/netlink | |
| parent | d7309c4e42449247ab242eb5dc06a45b4c8be943 (diff) | |
| download | linux-stable-4b016f0e749538bfebdfa5bea6aeebcd37ea9a0c.tar.gz linux-stable-4b016f0e749538bfebdfa5bea6aeebcd37ea9a0c.tar.bz2 linux-stable-4b016f0e749538bfebdfa5bea6aeebcd37ea9a0c.zip | |
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>
Diffstat (limited to 'net/netlink')
| -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 70c455341243..02506752051d 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1845,6 +1845,8 @@ 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; |