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AKwUvBxbPVHlSAkpwRuCqgNlT1toyzxdl82bgH6DmbHaMZs5JzudrPVXxNA7yXa+ifZvJ9lPRVIHvtsdFJ5rPaw=@vger.kernel.org X-Gm-Message-State: AFuF++m7IKGkkmgmQlj77Mk+c26xNgBP4tqRxJxnCdm+3EEjNs8lNLRn QT7fsh3TxrhkpgDxP9wHf9DG8qUmqvnTugvdJFOHUORLwADJR+8aE4+53GDAp3U2lu3+NsXrLUe mBiZRgo5p0uFWcIS1vT1nzoBYVyHgiNYhD5q2jv7VovYSkxnY34UsduAlQxk= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:f012:b0:6c1:b8a5:cbed with SMTP id 006d021491bc7-6c24f6527a5mr4222634eaf.55.1789313666919; Sun, 13 Sep 2026 08:34:26 -0700 (PDT) Date: Sun, 13 Sep 2026 08:34:26 -0700 In-Reply-To: <6a9ed559.6e6c5f9e.240462.0003.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6aa6c282.4c28b7d0.c1bba.000d.GAE@google.com> Subject: Re: [syzbot] [nvme?] WARNING in nvme_loop_reset_ctrl_work From: syzbot To: hch@lst.de, kch@nvidia.com, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, sagi@grimberg.me, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 2f0c1cf72f46 Merge tag 's390-7.3-3' of git://git.kernel.or.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=159b19f9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8c5c3949d762a91f dashboard link: https://syzkaller.appspot.com/bug?extid=4a1d521d19d6321f5aad compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1074f615580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4a1d521d19d6321f5aad@syzkaller.appspotmail.com ------------[ cut here ]------------ 1 WARNING: drivers/nvme/target/loop.c:455 at nvme_loop_reset_ctrl_work+0x1ad/0x5d0 drivers/nvme/target/loop.c:455, CPU#2: kworker/u33:1/38 Modules linked in: CPU: 2 UID: 0 PID: 38 Comm: kworker/u33:1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: nvme-reset-wq nvme_loop_reset_ctrl_work RIP: 0010:nvme_loop_reset_ctrl_work+0x1ad/0x5d0 drivers/nvme/target/loop.c:455 Code: 7c 08 84 d2 0f 85 85 03 00 00 8b 9d dc f8 ff ff bf 01 00 00 00 83 eb 04 89 de e8 5e 1e 58 fb 83 fb 01 76 09 e8 e4 23 58 fb 90 <0f> 0b 90 e8 db 23 58 fb 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc90000727bd8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 00000000fffffffd RCX: 0000000000000000 RDX: ffff88801c78cb00 RSI: ffffffff86b3f22c RDI: ffff88801c78cb00 RBP: ffff888028d84b10 R08: 0000000000000005 R09: 0000000000000001 R10: 00000000fffffffd R11: 0000000000000000 R12: ffff888028d843e8 R13: ffff888028d843ec R14: 0000000000000000 R15: ffff888027346800 FS: 0000000000000000(0000) GS:ffff8880d5d59000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fde19ca5e9c CR3: 000000002206a000 CR4: 0000000000352ef0 Call Trace: process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396 process_scheduled_works kernel/workqueue.c:3479 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.