David S. Miller 676d23690f net: Fix use after free by removing length arg from sk_data_ready callbacks. ... Several spots in the kernel perform a sequence like: skb_queue_tail(&sk->s_receive_queue, skb); sk->sk_data_ready(sk, skb->len); But at the moment we place the SKB onto the socket receive queue it can be consumed and freed up. So this skb->len access is potentially to freed up memory. Furthermore, the skb->len can be modified by the consumer so it is possible that the value isn't accurate. And finally, no actual implementation of this callback actually uses the length argument. And since nobody actually cared about it's value, lots of call sites pass arbitrary values in such as '0' and even '1'. So just remove the length argument from the callback, that way there is no confusion whatsoever and all of these use-after-free cases get fixed as a side effect. Based upon a patch by Eric Dumazet and his suggestion to audit this issue tree-wide. Signed-off-by: David S. Miller <davem@davemloft.net>		2014-04-11 16:15:36 -04:00
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af_vsock.c	net: rework recvmsg handler msg_name and msg_namelen logic	2013-11-20 21:52:30 -05:00
Kconfig	treewide: Fix typo in Kconfig	2013-10-14 15:23:02 +02:00
Makefile	VSOCK: Introduce VM Sockets	2013-02-10 19:41:08 -05:00
vmci_transport.c	net: add build-time checks for msg->msg_name size	2014-01-18 23:04:16 -08:00
vmci_transport.h	VSOCK: Move af_vsock.h and vsock_addr.h to include/net	2013-07-27 22:14:06 -07:00
vmci_transport_notify.c	net: Fix use after free by removing length arg from sk_data_ready callbacks.	2014-04-11 16:15:36 -04:00
vmci_transport_notify.h	VSOCK: Introduce VM Sockets	2013-02-10 19:41:08 -05:00
vmci_transport_notify_qstate.c	net: Fix use after free by removing length arg from sk_data_ready callbacks.	2014-04-11 16:15:36 -04:00
vsock_addr.c	VSOCK: Move af_vsock.h and vsock_addr.h to include/net	2013-07-27 22:14:06 -07:00