diff options
| author | Florian Westphal <fw@strlen.de> | 2020-01-24 16:04:02 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-01-25 08:14:39 +0100 |
| commit | e42f1ac626e7f799717d006e0f8393b6d6f9fc8c (patch) | |
| tree | 0cba402eedefff40444f145c5209ee62e6008560 /include/net | |
| parent | 08a45c59f16efe33ca715e894231a9b7afd3b7b4 (diff) | |
mptcp: do not inherit inet proto ops
We need to initialise the struct ourselves, else we expose tcp-specific
callbacks such as tcp_splice_read which will then trigger splat because
the socket is an mptcp one:
BUG: KASAN: slab-out-of-bounds in tcp_mstamp_refresh+0x80/0xa0 net/ipv4/tcp_output.c:57
Write of size 8 at addr ffff888116aa21d0 by task syz-executor.0/5478
CPU: 1 PID: 5478 Comm: syz-executor.0 Not tainted 5.5.0-rc6 #3
Call Trace:
tcp_mstamp_refresh+0x80/0xa0 net/ipv4/tcp_output.c:57
tcp_rcv_space_adjust+0x72/0x7f0 net/ipv4/tcp_input.c:612
tcp_read_sock+0x622/0x990 net/ipv4/tcp.c:1674
tcp_splice_read+0x20b/0xb40 net/ipv4/tcp.c:791
do_splice+0x1259/0x1560 fs/splice.c:1205
To prevent build error with ipv6, add the recv/sendmsg function
declaration to ipv6.h. The functions are already accessible "thanks"
to retpoline related work, but they are currently only made visible
by socket.c specific INDIRECT_CALLABLE macros.
Reported-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/ipv6.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h index 4e95f6df508c..cec1a54401f2 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -1113,6 +1113,9 @@ int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); int inet6_hash_connect(struct inet_timewait_death_row *death_row, struct sock *sk); +int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size); +int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, + int flags); /* * reassembly.c |