From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f207.google.com (mail-oi1-f207.google.com [209.85.167.207]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D1A4625B0BF for ; Wed, 15 Jul 2026 03:16:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784085397; cv=none; b=gtD8KdmzrcRcsWtZsyTnHCNquebGRvhukAz5jSBNDqQjJcg2M3Pun9t+RDgoCTHm4N+OX8VdifTH2Ygk8pcomoDyIo17kE8GLGTtHLbTXAgIxX2elkVOsgIFQdpfG0Trc9XpVoAbEarGo7nft6ctX47dXkfO67PFCbW4im2aoWA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784085397; c=relaxed/simple; bh=dGcyDd6iRFZ2PFIHIA0eZ8bDG/AZ44iqdkKOjjHQNkQ=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=ECSM9QJMN4Bibzs6kl7eYZVrVjrKD4v4jINA5ys7jIG14po41BeVyrjkNJT6n5daNOPV2J/xzJutppywUadl+1+trnze38mmvv2kXRuat1h6DKyUz8ZtYpiNvU2/zJ0qM8P+vLlBMaIWnRNwt7HGWOuiS1RAlY6YRpyuvt19ovM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.167.207 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi1-f207.google.com with SMTP id 5614622812f47-495b4a78694so8246627b6e.0 for ; Tue, 14 Jul 2026 20:16:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784085395; x=1784690195; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=/Vl2OeRFhCCelhBd3N0eEuVBOIOoMZFFFoFgeC0FBmc=; b=bADuHHH1F4QhdNzkLg36jVnxiWFG4Ic8KD1Akq/BauSqWYONL1tDCsJQiARbMG1mh8 ZyMI6pMM4XjX4PEmIR4tRpUflq0R0COp74PsWL27zOHW0i7siFV4DaA7UGZAqQW4xO09 QvmN3twxEe74tjTVsi4TfH575rI0vVBaTKRedNxK/uhC1+3lPdOq6hhgJr2yvs2e1JcV YrGzMhyvDwzcGaHRHkO8tZXlaOogj8Rxmzmovy0ojCjFnjAY1CeBq+X2XQW2jHd7m/xV uOqu03oUe6s13Ztw6w+CjbFZJTGtq0HQz+6Rmo4q9uGNI4abqNxh/qExkzxdQAMZlaxZ 1BFQ== X-Forwarded-Encrypted: i=1; AHgh+Rrnpmwz1oXQEQFpMsUQVKyomwzyu74Hufu8M+wjbO7H+NrPEVdU83+0TT64PyWDye6ltuW6ve+Y6r+DSg==@vger.kernel.org X-Gm-Message-State: AOJu0YwnNxBberkvGYl86Q3gGItfLbIz4BNHZc9uaWRqVHfl8zkb91y7 LusVA2f+v2ILYvdVNKHwjnKGZyJIUijqdiPPKbaYb8gpUOLR6D2p16h18JFGZgi+Y3WTA6ve7qp UzFj+uRzDEpZB0eGwpERbKQQlhyCOInazaOZiLWLcN+//W+U0xoII66wWPCk= Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1b25:b0:4a4:d2b:8e7a with SMTP id 5614622812f47-4a49607ea2amr890192b6e.35.1784085394843; Tue, 14 Jul 2026 20:16:34 -0700 (PDT) Date: Tue, 14 Jul 2026 20:16:34 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a56fb92.c90005c7.37d349.003c.GAE@google.com> Subject: [syzbot] [media?] INFO: trying to register non-static key in __vb2_queue_cancel From: syzbot To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, m.szyprowski@samsung.com, mchehab@kernel.org, syzkaller-bugs@googlegroups.com, tfiga@chromium.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: cc2b5f627e8c Add linux-next specific files for 20260714 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=17fb04b9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=2290ccbf984c524f dashboard link: https://syzkaller.appspot.com/bug?extid=2302c5dc59995fbb8089 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12d598b9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14500789580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6836f8efb1da/disk-cc2b5f62.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0109d3477cc7/vmlinux-cc2b5f62.xz kernel image: https://storage.googleapis.com/syzbot-assets/c2e49e350bbf/bzImage-cc2b5f62.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2302c5dc59995fbb8089@syzkaller.appspotmail.com em28xx 1-1:0.132: AC97 chip type couldn't be determined em28xx 1-1:0.132: No AC97 audio processor usb 1-1: Decoder not found em28xx 1-1:0.132: failed to create media graph em28xx 1-1:0.132: V4L2 device video103 deregistered INFO: trying to register non-static key. The code is fine but needs lockdep annotation, or maybe you didn't initialize this object before use? turning off the locking correctness validator. CPU: 1 UID: 0 PID: 5649 Comm: kworker/1:3 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026 Workqueue: events request_module_async Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 assign_lock_key+0x133/0x150 kernel/locking/lockdep.c:1000 register_lock_class+0xcc/0x2e0 kernel/locking/lockdep.c:1315 __lock_acquire+0xaf/0x2e40 kernel/locking/lockdep.c:5128 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5906 rt_spin_lock+0x83/0x400 kernel/locking/spinlock_rt.c:56 spin_lock include/linux/spinlock_rt.h:45 [inline] __wake_up_common_lock+0x2f/0x1f0 kernel/sched/wait.c:124 __vb2_queue_cancel+0x2de/0xdc0 drivers/media/common/videobuf2/videobuf2-core.c:2244 vb2_core_queue_release+0x2f/0x150 drivers/media/common/videobuf2/videobuf2-core.c:2677 vb2_queue_release drivers/media/common/videobuf2/videobuf2-v4l2.c:956 [inline] vb2_video_unregister_device+0x15b/0x200 drivers/media/common/videobuf2/videobuf2-v4l2.c:1292 em28xx_v4l2_init+0x1c60/0x3140 drivers/media/usb/em28xx/em28xx-video.c:3097 em28xx_init_extension+0x120/0x1d0 drivers/media/usb/em28xx/em28xx-core.c:1248 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379 process_scheduled_works kernel/workqueue.c:3462 [inline] worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 5649 Comm: kworker/1:3 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026 Workqueue: events request_module_async RIP: 0010:__wake_up_common kernel/sched/wait.c:104 [inline] RIP: 0010:__wake_up_common_lock+0xd6/0x1f0 kernel/sched/wait.c:125 Code: 0f 84 d4 00 00 00 44 8b 7c 24 04 eb 13 48 ba 00 00 00 00 00 fc ff df 4c 39 ed 0f 84 ba 00 00 00 49 89 ee 48 89 e8 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 f7 e8 1c ce 93 00 48 ba 00 00 00 00 00 fc RSP: 0018:ffffc9000595f908 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff8bcbd060 RDI: 00000000ffffffff RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1fa1890 R12: ffff88803e181b14 R13: ffff88803e181c28 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125af2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005625301fb660 CR3: 000000003774e000 CR4: 00000000003526f0 Call Trace: __vb2_queue_cancel+0x2de/0xdc0 drivers/media/common/videobuf2/videobuf2-core.c:2244 vb2_core_queue_release+0x2f/0x150 drivers/media/common/videobuf2/videobuf2-core.c:2677 vb2_queue_release drivers/media/common/videobuf2/videobuf2-v4l2.c:956 [inline] vb2_video_unregister_device+0x15b/0x200 drivers/media/common/videobuf2/videobuf2-v4l2.c:1292 em28xx_v4l2_init+0x1c60/0x3140 drivers/media/usb/em28xx/em28xx-video.c:3097 em28xx_init_extension+0x120/0x1d0 drivers/media/usb/em28xx/em28xx-core.c:1248 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379 process_scheduled_works kernel/workqueue.c:3462 [inline] worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__wake_up_common kernel/sched/wait.c:104 [inline] RIP: 0010:__wake_up_common_lock+0xd6/0x1f0 kernel/sched/wait.c:125 Code: 0f 84 d4 00 00 00 44 8b 7c 24 04 eb 13 48 ba 00 00 00 00 00 fc ff df 4c 39 ed 0f 84 ba 00 00 00 49 89 ee 48 89 e8 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 f7 e8 1c ce 93 00 48 ba 00 00 00 00 00 fc RSP: 0018:ffffc9000595f908 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff8bcbd060 RDI: 00000000ffffffff RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1fa1890 R12: ffff88803e181b14 R13: ffff88803e181c28 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125af2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005625301fb660 CR3: 000000003774e000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 0f 84 d4 00 00 00 je 0xda 6: 44 8b 7c 24 04 mov 0x4(%rsp),%r15d b: eb 13 jmp 0x20 d: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 14: fc ff df 17: 4c 39 ed cmp %r13,%rbp 1a: 0f 84 ba 00 00 00 je 0xda 20: 49 89 ee mov %rbp,%r14 23: 48 89 e8 mov %rbp,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction 2e: 74 12 je 0x42 30: 4c 89 f7 mov %r14,%rdi 33: e8 1c ce 93 00 call 0x93ce54 38: 48 rex.W 39: ba 00 00 00 00 mov $0x0,%edx 3e: 00 fc add %bh,%ah --- This report is generated by a bot. 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