From: Simon Horman <horms@kernel•org>
To: Edward Adam Davis <eadavis@qq•com>
Cc: davem@davemloft•net, dhowells@redhat•com, edumazet@google•com,
jarkko@kernel•org, jmorris@namei•org, keyrings@vger•kernel.org,
kuba@kernel•org, linux-kernel@vger•kernel.org,
linux-security-module@vger•kernel.org, netdev@vger•kernel.org,
pabeni@redhat•com, paul@paul-moore•com, serge@hallyn•com,
syzbot+94bbb75204a05da3d89f@syzkaller•appspotmail.com,
syzkaller-bugs@googlegroups•com
Subject: Re: [PATCH V2 next] keys/dns: fix slab-out-of-bounds in dns_resolver_preparse
Date: Sat, 16 Dec 2023 21:06:32 +0000 [thread overview]
Message-ID: <20231216210632.GW6288@kernel.org> (raw)
In-Reply-To: <tencent_7D663C8936BA96F837124A4474AF76ED6709@qq.com>
On Thu, Dec 14, 2023 at 10:46:10PM +0800, Edward Adam Davis wrote:
> bin will be forcibly converted to "struct dns_server_list_v1_header *", so it
> is necessary to compare datalen with sizeof(*v1).
>
> Fixes: b946001d3bb1 ("keys, dns: Allow key types (eg. DNS) to be reclaimed immediately on expiry")
> Reported-and-tested-by: syzbot+94bbb75204a05da3d89f@syzkaller•appspotmail.com
> Signed-off-by: Edward Adam Davis <eadavis@qq•com>
> ---
> net/dns_resolver/dns_key.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
This change looks correct to me.
And I agree that it addresses a problem introduced by the cited commit.
I also note that it depends on the cited commit, which is not present in net.
Reviewed-by: Simon Horman <horms@kernel•org>
next prev parent reply other threads:[~2023-12-16 21:06 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-14 8:15 [syzbot] [net?] KASAN: slab-out-of-bounds Read in dns_resolver_preparse syzbot
2023-12-14 14:33 ` [PATCH next] keys/dns: datalen must greater than sizeof(*v1) Edward Adam Davis
2023-12-14 14:46 ` [PATCH V2 next] keys/dns: fix slab-out-of-bounds in dns_resolver_preparse Edward Adam Davis
2023-12-16 21:06 ` Simon Horman [this message]
2023-12-15 3:00 ` [PATCH next] keys/dns: datalen must greater than sizeof(*v1) Jarkko Sakkinen
2023-12-23 23:17 ` [syzbot] [net?] KASAN: slab-out-of-bounds Read in dns_resolver_preparse David Howells
2023-12-23 23:17 ` syzbot
2023-12-23 23:34 ` David Howells
2023-12-23 23:59 ` syzbot
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