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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
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Kconfig	fs/dlm: remove CONFIG_EXPERIMENTAL	12 years ago
Makefile	…
ast.c	dlm: use INFO for recovery messages	11 years ago
ast.h	…
config.c	dlm: config: using strlcpy instead of strncpy	12 years ago
config.h	…
debug_fs.c	…
dir.c	dlm: use INFO for recovery messages	11 years ago
dir.h	…
dlm_internal.h	dlm: use INFO for recovery messages	11 years ago
lock.c	dlm: use INFO for recovery messages	11 years ago
lock.h	…
lockspace.c	dlm: use INFO for recovery messages	11 years ago
lockspace.h	…
lowcomms.c	net: Fix use after free by removing length arg from sk_data_ready callbacks.	11 years ago
lowcomms.h	…
lvb_table.h	…
main.c	…
member.c	dlm: use INFO for recovery messages	11 years ago
member.h	…
memory.c	…
memory.h	…
midcomms.c	…
midcomms.h	…
netlink.c	genetlink: only pass array to genl_register_family_with_ops()	11 years ago
plock.c	dlm: avoid unnecessary posix unlock	12 years ago
rcom.c	…
rcom.h	…
recover.c	dlm: use INFO for recovery messages	11 years ago
recover.h	…
recoverd.c	dlm: use INFO for recovery messages	11 years ago
recoverd.h	…
requestqueue.c	…
requestqueue.h	…
user.c	dlm: remove signal blocking	12 years ago
user.h	…
util.c	…
util.h	…