From: Ido Schimmel <idosch@nvidia.com>
To: Eric Dumazet <edumazet@google.com>
Cc: "David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Simon Horman <horms@kernel.org>, David Ahern <dsahern@kernel.org>,
netdev@vger.kernel.org, eric.dumazet@gmail.com
Subject: Re: [PATCH net] ipv6: fix possible UAF in icmpv6_rcv()
Date: Sat, 18 Apr 2026 18:47:47 +0300 [thread overview]
Message-ID: <20260418154747.GA804500@shredder> (raw)
In-Reply-To: <20260416103505.2380753-1-edumazet@google.com>
On Thu, Apr 16, 2026 at 10:35:05AM +0000, Eric Dumazet wrote:
> Caching saddr and daddr before pskb_pull() is problematic
> since skb->head can change.
>
> Remove these temporary variables:
>
> - We only access &ipv6_hdr(skb)->saddr and &ipv6_hdr(skb)->daddr
> when net_dbg_ratelimited() is called in the slow path.
>
> - Avoid potential future misuse after pskb_pull() call.
>
> Fixes: 4b3418fba0fe ("ipv6: icmp: include addresses in debug messages")
> Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
next prev parent reply other threads:[~2026-04-18 15:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-16 10:35 [PATCH net] ipv6: fix possible UAF in icmpv6_rcv() Eric Dumazet
2026-04-16 11:25 ` Fernando Fernandez Mancera
2026-04-16 18:10 ` Joe Damato
2026-04-18 15:47 ` Ido Schimmel [this message]
2026-04-18 19:20 ` patchwork-bot+netdevbpf
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