netdev - Re: [PATCH net 2/8] ndisc: use RCU protection in ndisc_alloc

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Message-ID: <285e43ed-d908-4383-9b18-8921400707f2@kernel.org>
Date: Fri, 7 Feb 2025 13:41:38 -0700
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, Kuniyuki Iwashima <kuniyu@...zon.com>,
 Simon Horman <horms@...nel.org>, eric.dumazet@...il.com
Subject: Re: [PATCH net 2/8] ndisc: use RCU protection in ndisc_alloc_skb()

On 2/7/25 6:58 AM, Eric Dumazet wrote:
> ndisc_alloc_skb() can be called without RTNL or RCU being held.
> 
> Add RCU protection to avoid possible UAF.
> 
> Fixes: de09334b9326 ("ndisc: Introduce ndisc_alloc_skb() helper.")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> ---
>  net/ipv6/ndisc.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 

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