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| author | Zhengchao Shao <shaozhengchao@huawei.com> | 2023-07-10 17:40:53 +0800 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2023-07-11 11:06:08 +0200 |
| commit | 6018a266279b1a75143c7c0804dd08a5fc4c3e0b (patch) | |
| tree | fc27054e187c4e07eed7ee4bafde7fd848072c94 /net/xfrm | |
| parent | 9fd41f1ba638938c9a1195d09bc6fa3be2712f25 (diff) | |
| download | lwn-6018a266279b1a75143c7c0804dd08a5fc4c3e0b.tar.gz lwn-6018a266279b1a75143c7c0804dd08a5fc4c3e0b.zip | |
ip_vti: fix potential slab-use-after-free in decode_session6
When ip_vti device is set to the qdisc of the sfb type, the cb field
of the sent skb may be modified during enqueuing. Then,
slab-use-after-free may occur when ip_vti device sends IPv6 packets.
As commit f855691975bb ("xfrm6: Fix the nexthdr offset in
_decode_session6.") showed, xfrm_decode_session was originally intended
only for the receive path. IP6CB(skb)->nhoff is not set during
transmission. Therefore, set the cb field in the skb to 0 before
sending packets.
Fixes: f855691975bb ("xfrm6: Fix the nexthdr offset in _decode_session6.")
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm')
0 files changed, 0 insertions, 0 deletions