diff options
| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2013-11-21 03:14:34 +0100 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2014-05-19 07:54:01 +0200 |
| commit | b52a430ce161044be5e8c77a0e3275cc548e2558 (patch) | |
| tree | 85f4d0bf574e3ae6d6e7b380d84c7ea9324eb77f /net | |
| parent | 4485f23cb4c08b21f0a4434a65c8adf0026d589a (diff) | |
net: add BUG_ON if kernel advertises msg_namelen > sizeof(struct sockaddr_storage)
[ Upstream commit 68c6beb373955da0886d8f4f5995b3922ceda4be ]
In that case it is probable that kernel code overwrote part of the
stack. So we should bail out loudly here.
The BUG_ON may be removed in future if we are sure all protocols are
conformant.
Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'net')
| -rw-r--r-- | net/socket.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/socket.c b/net/socket.c index 06e8f3d1db2f..11bad1562784 100644 --- a/net/socket.c +++ b/net/socket.c @@ -216,12 +216,13 @@ int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr, int err; int len; + BUG_ON(klen > sizeof(struct sockaddr_storage)); err = get_user(len, ulen); if (err) return err; if (len > klen) len = klen; - if (len < 0 || len > sizeof(struct sockaddr_storage)) + if (len < 0) return -EINVAL; if (len) { if (audit_sockaddr(klen, kaddr)) |