From: Jingbo Xu <jefflexu@linux.alibaba.com>
To: Li Wang <liwang@kylinos.cn>, Miklos Szeredi <miklos@szeredi.hu>
Cc: Joanne Koong <joannelkoong@gmail.com>,
Bernd Schubert <bernd@bsbernd.com>,
fuse-devel@lists.linux.dev, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] fuse: fix kernel NULL pointer dereference in fuse_uring_add_to_pq()
Date: Wed, 22 Apr 2026 19:18:36 +0800 [thread overview]
Message-ID: <e6077b7c-160c-4444-8ab8-ccab8b14ac27@linux.alibaba.com> (raw)
In-Reply-To: <20260422103603.4554-1-liwang@kylinos.cn>
On 4/22/26 6:36 PM, Li Wang wrote:
> A kernel NULL pointer dereference was triggered when testing the
> 'fuse over io_uring' feature with passthrough_ll. The call trace
> is as follows:
> BUG: kernel NULL pointer dereference, address: 0000000000000878
> RIP: 0010:fuse_uring_add_req_to_ring_ent+0x89/0xd0 [fuse]
> Call Trace:
> <TASK>
> fuse_uring_queue_fuse_req+0x82/0x100 [fuse]
> fuse_chan_send+0xe6/0x180 [fuse]
I don't see fuse_chan_send() in upstream kernel. I think you are
testing kernel with this patchset[1] applied?
[1] https://lore.kernel.org/all/20260416091658.462783-1-mszeredi@redhat.com/
--
Thanks,
Jingbo
next prev parent reply other threads:[~2026-04-22 11:18 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-22 10:36 Li Wang
2026-04-22 11:18 ` Jingbo Xu [this message]
2026-04-23 1:52 ` Li Wang
2026-04-22 11:39 ` Bernd Schubert
2026-04-23 2:04 ` Li Wang
2026-04-22 19:18 ` Joanne Koong
2026-04-23 6:44 ` Li Wang
2026-04-23 7:17 ` Miklos Szeredi
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