From: Eric Dumazet <eric.dumazet@gmail.com>
To: "Jason A. Donenfeld" <Jason@zx2c4.com>,
Eric Dumazet <edumazet@google.com>
Cc: netdev <netdev@vger.kernel.org>,
syzbot <syzkaller@googlegroups.com>,
"David S . Miller" <davem@davemloft.net>,
WireGuard mailing list <wireguard@lists.zx2c4.com>
Subject: Re: [PATCH net] wireguard: fix use-after-free in root_remove_peer_lists
Date: Mon, 3 Feb 2020 10:20:32 -0800 [thread overview]
Message-ID: <ba618605-ec50-085d-c854-f65290473c1c@gmail.com> (raw)
In-Reply-To: <efaa70a3-5c71-3cc0-ffe4-e8401d598992@gmail.com>
On 2/3/20 10:17 AM, Eric Dumazet wrote:
>
>
> On 2/3/20 9:29 AM, Jason A. Donenfeld wrote:
>> Hi Eric,
>>
>> On Mon, Feb 3, 2020 at 6:19 PM Eric Dumazet <edumazet@google.com> wrote:
>>> diff --git a/drivers/net/wireguard/allowedips.c b/drivers/net/wireguard/allowedips.c
>>> index 121d9ea0f13584f801ab895753e936c0a12f0028..3725e9cd85f4f2797afd59f42af454acc107aa9a 100644
>>> --- a/drivers/net/wireguard/allowedips.c
>>> +++ b/drivers/net/wireguard/allowedips.c
>>> @@ -263,6 +263,7 @@ static int add(struct allowedips_node __rcu **trie, u8 bits, const u8 *key,
>>> } else {
>>> node = kzalloc(sizeof(*node), GFP_KERNEL);
>>> if (unlikely(!node)) {
>>> + list_del(&newnode->peer_list);
>>> kfree(newnode);
>>> return -ENOMEM;
>>> }
>>> --
>>> 2.25.0.341.g760bfbb309-goog
>>
>> Thanks, nice catch. I remember switching that code over to using the
>> peer_list somewhat recently and embarrassed I missed this. Glad to see
>> WireGuard is hooked up to syzkaller.
>>
>
> I will let you work on a lockdep issue that syzbot found :)
>
BTW wireguard@lists.zx2c4.com seems to be a moderated list...
You might document this.
diff --git a/MAINTAINERS b/MAINTAINERS
index 0ae68fb8d38f167ae4a4b8ab49e27946393641e5..890d1f3e698e4c2475eadcd4a462768391328dd7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18040,7 +18040,7 @@ M: Jason A. Donenfeld <Jason@zx2c4.com>
S: Maintained
F: drivers/net/wireguard/
F: tools/testing/selftests/wireguard/
-L: wireguard@lists.zx2c4.com
+L: wireguard@lists.zx2c4.com (moderated for non-subscribers)
L: netdev@vger.kernel.org
WISTRON LAPTOP BUTTON DRIVER
_______________________________________________
WireGuard mailing list
WireGuard@lists.zx2c4.com
https://lists.zx2c4.com/mailman/listinfo/wireguard
next prev parent reply other threads:[~2020-02-04 21:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-03 17:19 Eric Dumazet
2020-02-03 17:29 ` Jason A. Donenfeld
2020-02-03 18:17 ` Eric Dumazet
2020-02-03 18:20 ` Eric Dumazet [this message]
2020-02-03 18:22 ` Jason A. Donenfeld
2020-02-03 18:24 ` Jason A. Donenfeld
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ba618605-ec50-085d-c854-f65290473c1c@gmail.com \
--to=eric.dumazet@gmail.com \
--cc=Jason@zx2c4.com \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=netdev@vger.kernel.org \
--cc=syzkaller@googlegroups.com \
--cc=wireguard@lists.zx2c4.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).