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>,
netdev@vger.kernel.org, eric.dumazet@gmail.com,
syzbot+a35f9259d08f907c06e6@syzkaller.appspotmail.com,
Nikolay Aleksandrov <razor@blackwall.org>
Subject: Re: [PATCH v2 net] net: bridge: prevent too big nested attributes in br_fill_linkxstats()
Date: Wed, 20 May 2026 22:52:48 +0300 [thread overview]
Message-ID: <20260520195248.GA738586@shredder> (raw)
In-Reply-To: <20260520114207.1394241-1-edumazet@google.com>
On Wed, May 20, 2026 at 11:42:07AM +0000, Eric Dumazet wrote:
> After commit ff205bf8c554 ("netlink: add one debug check in nla_nest_end()")
> syzbot found that br_fill_linkxstats() can send corrupted netlink packets.
>
> Make sure the nested attribute size is bounded.
>
> Fixes: a60c090361ea ("bridge: netlink: export per-vlan stats")
> Reported-by: syzbot+a35f9259d08f907c06e6@syzkaller.appspotmail.com
> Closes: https://lore.kernel.org/netdev/6a0b0da3.050a0220.175f0c.0000.GAE@google.com/
> Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
next prev parent reply other threads:[~2026-05-20 19:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-20 11:42 [PATCH v2 net] net: bridge: prevent too big nested attributes in br_fill_linkxstats() Eric Dumazet
2026-05-20 19:52 ` Ido Schimmel [this message]
2026-05-21 12:22 ` Nikolay Aleksandrov
2026-05-21 16:00 ` patchwork-bot+netdevbpf
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