netdev - Re: [PATCH net] ipv4: annotate data-races around fi->fib

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Date: Mon, 28 Aug 2023 09:09:37 -0600
From: David Ahern <dsahern@...nel.org>
To: Eric Dumazet <edumazet@...gle.com>, "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,
 syzbot <syzkaller@...glegroups.com>
Subject: Re: [PATCH net] ipv4: annotate data-races around fi->fib_dead

On 8/28/23 6:15 AM, Eric Dumazet wrote:
> syzbot complained about a data-race in fib_table_lookup() [1]
> 
> Add appropriate annotations to document it.
> 

...

> 
> Reported by Kernel Concurrency Sanitizer on:
> CPU: 1 PID: 21839 Comm: kworker/u4:18 Tainted: G W 6.5.0-syzkaller #0
> 
> Fixes: dccd9ecc3744 ("ipv4: Do not use dead fib_info entries.")
> Reported-by: syzbot <syzkaller@...glegroups.com>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> ---
>  net/ipv4/fib_semantics.c | 5 ++++-
>  net/ipv4/fib_trie.c      | 3 ++-
>  2 files changed, 6 insertions(+), 2 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>