netdev - [PATCH net 0/4] ipv6: f6i->fib6_siblings and rt->fib6

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Message-ID: <20250725140725.3626540-1-edumazet@google.com>
Date: Fri, 25 Jul 2025 14:07:21 +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: Simon Horman <horms@...nel.org>, David Ahern <dsahern@...nel.org>, 
	Kuniyuki Iwashima <kuniyu@...gle.com>, netdev@...r.kernel.org, eric.dumazet@...il.com, 
	Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net 0/4] ipv6: f6i->fib6_siblings and rt->fib6_nsiblings fixes

Series based on an internal syzbot report with a repro.

After fixing (in the first patch) the original minor issue,
I found that syzbot repro was able to trigger a second
more serious bug in rt6_nlmsg_size().

Code review then led to the two final patches.

I have not released the syzbot bug, because other issues
still need investigations.

Eric Dumazet (4):
  ipv6: add a retry logic in net6_rt_notify()
  ipv6: prevent infinite loop in rt6_nlmsg_size()
  ipv6: fix possible infinite loop in fib6_info_uses_dev()
  ipv6: annotate data-races around rt->fib6_nsiblings

 net/ipv6/ip6_fib.c | 24 ++++++++++------
 net/ipv6/route.c   | 71 +++++++++++++++++++++++++++-------------------
 2 files changed, 57 insertions(+), 38 deletions(-)

-- 
2.50.1.470.g6ba607880d-goog