netdev - [PATCH net 0/5] dst_cache: fix possible races

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Message-ID: <20240531132636.2637995-1-edumazet@google.com>
Date: Fri, 31 May 2024 13:26:31 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, eric.dumazet@...il.com, 
	Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net 0/5] dst_cache: fix possible races

This series is inspired by various undisclosed syzbot
reports hinting at corruptions in dst_cache structures.

It seems at least four users of dst_cache are racy against
BH reentrancy.

Last patch is adding a DEBUG_NET check to catch future misuses.
 
Eric Dumazet (5):
  ipv6: ioam: block BH from ioam6_output()
  net: ipv6: rpl_iptunnel: block BH in rpl_output() and rpl_input()
  ipv6: sr: block BH in seg6_output_core() and seg6_input_core()
  ila: block BH in ila_output()
  net: dst_cache: add two DEBUG_NET warnings

 net/core/dst_cache.c      |  2 ++
 net/ipv6/ila/ila_lwt.c    |  7 ++++++-
 net/ipv6/ioam6_iptunnel.c |  8 ++++----
 net/ipv6/rpl_iptunnel.c   | 14 ++++++--------
 net/ipv6/seg6_iptunnel.c  | 14 ++++++--------
 5 files changed, 24 insertions(+), 21 deletions(-)

-- 
2.45.1.288.g0e0cd299f1-goog