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[net-next,0/4] net: CONFIG_DEBUG_NET and friends

Message ID 20220509190851.1107955-1-eric.dumazet@gmail.com (mailing list archive)
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Series net: CONFIG_DEBUG_NET and friends | expand

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Eric Dumazet May 9, 2022, 7:08 p.m. UTC 
From: Eric Dumazet <edumazet@google.com>

This patch series is inspired by some syzbot reports
hinting that skb transport_header might be not set
in places we expect it being set.

Add a new CONFIG_DEBUG_NET option
and DEBUG_NET_WARN_ON_ONCE() helper, so that we can start
adding more sanity checks in the future.

Replace two BUG() in skb_checksum_help()
with less risky code.

Eric Dumazet (4):
  net: add include/net/net_debug.h
  net: add CONFIG_DEBUG_NET
  net: warn if transport header was not set
  net: remove two BUG() from skb_checksum_help()

 include/linux/netdevice.h | 154 +----------------------------------
 include/linux/skbuff.h    |   2 +
 include/net/net_debug.h   | 165 ++++++++++++++++++++++++++++++++++++++
 net/Kconfig.debug         |   7 ++
 net/core/dev.c            |   8 +-
 5 files changed, 181 insertions(+), 155 deletions(-)
 create mode 100644 include/net/net_debug.h