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

[Tyler Hicks]

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(-)

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2.7.4