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(parent: 26d6242) | patch
l2tp: avoid use-after-free caused by l2tp_ip_backlog_recv
authorPaul Hüber <phueber@kernsp.in>
Sun, 26 Feb 2017 16:58:19 +0000 (17:58 +0100)
committerBen Hutchings <ben@decadent.org.uk>
Thu, 12 Oct 2017 14:27:20 +0000 (15:27 +0100)
commit3a45ed9afc5d3f009e8358ae01a8360c70ae6e32
treec01ba7807b3624f5bcbe2c5d8aa71621ecbeb013tree | snapshot
parent26d624204b5243a0c928bad4bf62560bb63f385dcommit | diff
l2tp: avoid use-after-free caused by l2tp_ip_backlog_recv

commit 51fb60eb162ab84c5edf2ae9c63cf0b878e5547e upstream.

l2tp_ip_backlog_recv may not return -1 if the packet gets dropped.
The return value is passed up to ip_local_deliver_finish, which treats
negative values as an IP protocol number for resubmission.

Signed-off-by: Paul Hüber <phueber@kernsp.in>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
net/l2tp/l2tp_ip.c diff | blob | history
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