[PATCH net v2 0/2] Fix UDP length overflow in edge cases

From: Alice Mikityanska <[email protected]>

These are fixes for rare edge cases of 16-bit UDP length field overflow
that might happen on netdevs with MTU >= 64k.

Exposed by the new WARN added to udp_set_len_short, reported by syzbot.

v1: https://lore.kernel.org/netdev/[email protected]/

Alice Mikityanska (2):
  net: Fix UDP length overflow with PMTU discover and big MTU
  net: ipv6: Clamp to IP6_MAX_MTU in ip6_dst_mtu_maybe_forward

 include/net/ip6_route.h                      |  2 +
 net/ipv4/ip_output.c                         |  2 +
 net/ipv6/ip6_output.c                        |  2 +-
 tools/testing/selftests/net/Makefile         |  1 +
 tools/testing/selftests/net/cork_fragsize.py | 77 ++++++++++++++++++++
 5 files changed, 83 insertions(+), 1 deletion(-)
 create mode 100755 tools/testing/selftests/net/cork_fragsize.py

-- 
2.55.0