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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>		11 years ago
..
Kconfig	…
Makefile	…
TODO	…
af_ax25.c	net: add build-time checks for msg->msg_name size	11 years ago
ax25_addr.c	…
ax25_dev.c	…
ax25_ds_in.c	…
ax25_ds_subr.c	hlist: drop the node parameter from iterators	12 years ago
ax25_ds_timer.c	hlist: drop the node parameter from iterators	12 years ago
ax25_iface.c	hlist: drop the node parameter from iterators	12 years ago
ax25_in.c	net: Fix use after free by removing length arg from sk_data_ready callbacks.	11 years ago
ax25_ip.c	…
ax25_out.c	…
ax25_route.c	…
ax25_std_in.c	…
ax25_std_subr.c	…
ax25_std_timer.c	…
ax25_subr.c	…
ax25_timer.c	…
ax25_uid.c	hlist: drop the node parameter from iterators	12 years ago
sysctl_net_ax25.c	net: Convert uses of typedef ctl_table to struct ctl_table	12 years ago