ACK: [PATCH 0/2][SRU][D/E] CVE-2019-11683: UDP GRO Denial-of-Service

Colin Ian King colin.king at canonical.com
Fri May 3 17:29:31 UTC 2019


On 03/05/2019 18:22, Tyler Hicks wrote:
> https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-11683.html
> 
>  udp_gro_receive_segment in net/ipv4/udp_offload.c in the Linux kernel 5.x
>  through 5.0.11 allows remote attackers to cause a denial of service
>  (slab-out-of-bounds memory corruption) or possibly have unspecified other
>  impact via UDP packets with a 0 payload, because of mishandling of padded
>  packets, aka the "GRO packet of death" issue.
> 
> Clean cherry picks and build log. I've verified that the syzbot reproducer
> crashes the 5.0.0-13.14 Disco kernel but not once these fixes are applied. I've
> also regression tested with the udpgso.sh, udpgso_bench.sh, udpgro_bench.sh,
> and udpgro.sh net selftests.
> 
> Tyler
> 
> Eric Dumazet (1):
>   udp: fix GRO packet of death
> 
> Paolo Abeni (1):
>   udp: fix GRO reception in case of length mismatch
> 
>  net/ipv4/udp_offload.c | 16 ++++++++++++----
>  1 file changed, 12 insertions(+), 4 deletions(-)
> 

Clean cherry picks. Looks OK to me.

Acked-by: Colin Ian King <colin.king at canonical.com>



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