From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f79.google.com (mail-ot1-f79.google.com [209.85.210.79]) (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 7904934F46F for ; Mon, 16 Mar 2026 10:22:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773656568; cv=none; b=ccZplL/Cu1bu6D4EqNGdN22IQnLo7j+ZAmAma7TdasYlT63CJ1tFkYpUUyhBA39Y9DSnlsuOIelOmmrSVNP0Ol6ry1VrKHmReXCEvIF7cTXoucPUX1nO3asHhcCW5omn7OMkMqLQgJ7IaEW+jxmdEw9XoDI2SvCE3EuoVR7HNC8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773656568; c=relaxed/simple; bh=isBQOKgwlhba3B56b2KOxcuq1S9BZwmyrHN3kBpQ/2g=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=ohbuw2c0BOWakszPQKsJQ6C9yRNKALg1uR5lJ/7f1J6d7w8pycdEt1au2VFfVcj+xNvd0UQz0za/LIe1DR7z4XSqUN+Z31sf9QLXj325ROIsyRls/j3Wp8isY6s5JdwQ1xltKj69luTwZJPswzptrWxU+K/rDXmbMsQT/pTIHss= 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=209.85.210.79 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-ot1-f79.google.com with SMTP id 46e09a7af769-7d73fe3f986so39896820a34.2 for ; Mon, 16 Mar 2026 03:22:47 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773656566; x=1774261366; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=VK8/1NqeTNbZAVcvluXSA8kMOQjDKtel70OCMYrgRzU=; b=ZDE0m1hAKr4KCHTPpTIhgD8itjJC4gI6neEd7Isjvo5A5AbBsysQQC+GZT+l+Q8qrc jcVLm+oPJJmVDOT6kmkcYNRrIVdW4EycUfkyQNC8TyYZ+nBV0DpgsSE+zSelfiY6UIwq tKpsQSz31gi7Hrpr6US8mE7lu/fxR30EAGZz4VUrXNlLPH4GUtS2shzJRigHAbd8EmpC EfwfQzu0OJ4J6xSG3NKwP04UWvClUKgYOtZew4Xkfu9uy4L/9lO4B9imUU43szF6Qlwk MGfqkb+EuebS3m4dNx2nsKSWIbIK2ILt5+wbzvPpGodAYSWbPQgXzYBlFG1mdh+Ar11+ Idvw== X-Gm-Message-State: AOJu0YxgzgbvdjDrYbTODb8dvdi566SatGi2hBMpxfStVEQFVRqelP73 ywdiAhuPwfuhpNFRTTz4TsogU1T3PrrmEzItqUfRUjKwUu7+B4iFK22nrTP12v45jMJ82EyVSym YcUBKzWkDKv8IifYmTi86dGQY3dbspYKPYvSDde9M1Px2SuslgQfDfOkMGzs8cA== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4dfa:b0:67b:b182:1a7 with SMTP id 006d021491bc7-67bdaa6820amr8473994eaf.63.1773656566533; Mon, 16 Mar 2026 03:22:46 -0700 (PDT) Date: Mon, 16 Mar 2026 03:22:46 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69b7d9f6.050a0220.248e02.0111.GAE@google.com> Subject: [syzbot] [media?] WARNING in az6007_i2c_xfer (2) From: syzbot To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 80234b5ab240 Merge tag 'rproc-v7.0-fixes' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14bc775a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=779072223d02a312 dashboard link: https://syzkaller.appspot.com/bug?extid=cb60cba6678dbc243930 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/53f504b3f646/disk-80234b5a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/56d033e102f9/vmlinux-80234b5a.xz kernel image: https://storage.googleapis.com/syzbot-assets/93e75ca78ad3/bzImage-80234b5a.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cb60cba6678dbc243930@syzkaller.appspotmail.com usb read operation failed. (-71) ------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(__owner_task(owner) != get_current()) WARNING: kernel/locking/mutex.c:949 at __mutex_unlock_slowpath+0x218/0x7d0 kernel/locking/mutex.c:949, CPU#0: syz.0.9868/26313 Modules linked in: CPU: 0 UID: 0 PID: 26313 Comm: syz.0.9868 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/27/2026 RIP: 0010:__mutex_unlock_slowpath+0x21f/0x7d0 kernel/locking/mutex.c:949 Code: 2e 48 8b 44 24 10 42 0f b6 04 28 84 c0 0f 85 d3 00 00 00 83 3d d5 73 62 04 00 75 13 48 8d 3d 78 87 65 04 48 c7 c6 40 e9 cc 8b <67> 48 0f b9 3a 90 48 8b 54 24 10 e9 2d ff ff ff 48 89 54 24 10 90 RSP: 0018:ffffc90003907ac0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffc90003907b60 RCX: 0000000000080000 RDX: ffffc9000c799000 RSI: ffffffff8bcce940 RDI: ffffffff9014d270 RBP: ffffc90003907bd8 R08: ffffffff9011bec3 R09: 1ffffffff20237d8 R10: dffffc0000000000 R11: fffffbfff20237d9 R12: 1ffff92000720f60 R13: dffffc0000000000 R14: 1ffffffff344e690 R15: ffff88807d32c000 FS: 00007f298a8646c0(0000) GS:ffff888125463000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3028ed CR3: 00000000348a2000 CR4: 00000000003526f0 Call Trace: az6007_i2c_xfer+0xb65/0xb90 drivers/media/usb/dvb-usb-v2/az6007.c:827 __i2c_transfer+0x79a/0x2020 drivers/i2c/i2c-core-base.c:-1 i2c_transfer+0x1cc/0x2d0 drivers/i2c/i2c-core-base.c:2317 i2cdev_ioctl_rdwr+0x460/0x740 drivers/i2c/i2c-dev.c:306 i2cdev_ioctl+0x6a5/0x880 drivers/i2c/i2c-dev.c:467 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f298999c799 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f298a864028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f2989c15fa0 RCX: 00007f298999c799 RDX: 0000200000000340 RSI: 0000000000000707 RDI: 0000000000000004 RBP: 00007f2989a32c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2989c16038 R14: 00007f2989c15fa0 R15: 00007f2989d3fa48 ---------------- Code disassembly (best guess): 0: 2e 48 8b 44 24 10 cs mov 0x10(%rsp),%rax 6: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax b: 84 c0 test %al,%al d: 0f 85 d3 00 00 00 jne 0xe6 13: 83 3d d5 73 62 04 00 cmpl $0x0,0x46273d5(%rip) # 0x46273ef 1a: 75 13 jne 0x2f 1c: 48 8d 3d 78 87 65 04 lea 0x4658778(%rip),%rdi # 0x465879b 23: 48 c7 c6 40 e9 cc 8b mov $0xffffffff8bcce940,%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 90 nop 30: 48 8b 54 24 10 mov 0x10(%rsp),%rdx 35: e9 2d ff ff ff jmp 0xffffff67 3a: 48 89 54 24 10 mov %rdx,0x10(%rsp) 3f: 90 nop --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup