From: Jakub Sitnicki <jakub@cloudflare•com>
To: Ruan Bonan <bonan.ruan@u•nus.edu>
Cc: "john.fastabend@gmail•com" <john.fastabend@gmail•com>,
"davem@davemloft•net" <davem@davemloft•net>,
"edumazet@google•com" <edumazet@google•com>,
"kuba@kernel•org" <kuba@kernel•org>,
"pabeni@redhat•com" <pabeni@redhat•com>,
"netdev@vger•kernel.org" <netdev@vger•kernel.org>,
"bpf@vger•kernel.org" <bpf@vger•kernel.org>,
"linux-kernel@vger•kernel.org" <linux-kernel@vger•kernel.org>,
"syzkaller@googlegroups•com" <syzkaller@googlegroups•com>
Subject: Re: [BUG] general protection fault in sock_map_link_update_prog - Reproducible with Syzkaller
Date: Wed, 23 Oct 2024 14:51:30 +0200 [thread overview]
Message-ID: <877c9z9e3x.fsf@cloudflare.com> (raw)
In-Reply-To: <TYZPR06MB680739AC616DD61587BE380AD94C2@TYZPR06MB6807.apcprd06.prod.outlook.com> (Ruan Bonan's message of "Tue, 22 Oct 2024 02:36:23 +0000")
On Tue, Oct 22, 2024 at 02:36 AM GMT, Ruan Bonan wrote:
> I used Syzkaller and found that there is KASAN: null-ptr-deref (general protection fault in
> sock_map_link_update_prog) in net/core/sock_map.c in v6.12.0-rc2, which also causes a KASAN:
> slab-use-after-free at the same time. It looks like a concurrency bug in the BPF related subsystems. The
> reproducer is available, and I have reproduced this bug with it manually. Currently I can only reproduce this
> bug with root privilege.
>
> The detailed reports, config file, and reproducer program are attached in this e-mail. If you need further
> details, please let me know.
Thanks for the report. I was also able to reproduce the KASAN splat with
the attached repro locally and will investigate futher.
I have a small ask - please use plain text for mailing the list in the
future - https://useplaintext.email/
-jkbs
next prev parent reply other threads:[~2024-10-23 12:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-22 2:36 [BUG] general protection fault in sock_map_link_update_prog - Reproducible with Syzkaller Ruan Bonan
2024-10-23 12:51 ` Jakub Sitnicki [this message]
2024-10-23 13:04 ` Ruan Bonan
2025-01-10 14:08 ` Jakub Sitnicki
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