netdev - [PATCH v2 net-next 0/5] net: CONFIG_DEBUG

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Message-Id: <20220510035741.2807829-1-eric.dumazet@gmail.com>
Date:   Mon,  9 May 2022 20:57:36 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH v2 net-next 0/5] net: CONFIG_DEBUG_NET and friends

From: Eric Dumazet <edumazet@...gle.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.

v2: make first patch compile on more arches/compilers
    add the 5th patch to add more debugging in skb_checksum_help()

Eric Dumazet (5):
  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()
  net: add more debug info in skb_checksum_help()

 include/linux/netdevice.h | 141 +---------------------------------
 include/linux/skbuff.h    |   2 +
 include/net/net_debug.h   | 157 ++++++++++++++++++++++++++++++++++++++
 net/Kconfig.debug         |   7 ++
 net/core/dev.c            |  12 ++-
 5 files changed, 176 insertions(+), 143 deletions(-)
 create mode 100644 include/net/net_debug.h

-- 
2.36.0.512.ge40c2bad7a-goog