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| author |   Or Cohen <orcohen@paloaltonetworks.com> | 2020-09-03 21:05:28 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-09-04 11:56:02 -0700 |
| commit | acf69c946233259ab4d64f8869d4037a198c7f06 (patch) | |
| tree | 45b5adb90a74f16effbdeb788c763e87c47bb84b /include | |
| parent | Merge branch 'simplify-do_wp_page' (diff) | |
| download | wireguard-linux-acf69c946233259ab4d64f8869d4037a198c7f06.tar.xz wireguard-linux-acf69c946233259ab4d64f8869d4037a198c7f06.zip | |
net/packet: fix overflow in tpacket_rcv
Using tp_reserve to calculate netoff can overflow as
tp_reserve is unsigned int and netoff is unsigned short.
This may lead to macoff receving a smaller value then
sizeof(struct virtio_net_hdr), and if po->has_vnet_hdr
is set, an out-of-bounds write will occur when
calling virtio_net_hdr_from_skb.
The bug is fixed by converting netoff to unsigned int
and checking if it exceeds USHRT_MAX.
This addresses CVE-2020-14386
Fixes: 8913336a7e8d ("packet: add PACKET_RESERVE sockopt")
Signed-off-by: Or Cohen <orcohen@paloaltonetworks.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions