From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f77.google.com (mail-ot1-f77.google.com [209.85.210.77]) (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 2256332D7CC for ; Fri, 5 Dec 2025 15:03:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764947009; cv=none; b=QRa0Pj84gcTc5ZqC7p6Fnhr+LelEO61iJQSzx66DcMXVXn3ytlEWLRszx1I7d1z3+kn2PaWlR27rBaHMvcZqIVLfTr2L7uIro7cMlHe17kmrzihf8NANJrnN4Fap3RLFA8d3IipZuR8XI5LgySK6H7jpUeAk7ZHsV/gCtMfyXCA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764947009; c=relaxed/simple; bh=H8d8ZgxBp+MJmziHi/e+b235tqYhFPQdWYXwUDtYYwA=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; 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List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:3008:b0:441:8f74:fc8 with SMTP id 5614622812f47-45379ddf7c9mr3526983b6e.53.1764947005487; Fri, 05 Dec 2025 07:03:25 -0800 (PST) Date: Fri, 05 Dec 2025 07:03:25 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6932f43d.a70a0220.38f243.0002.GAE@google.com> Subject: [syzbot] [pvrusb2?] [usb?] WARNING in pvr2_send_request_ex From: syzbot To: isely@pobox.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-usb@vger.kernel.org, mchehab@kernel.org, pvrusb2@isely.net, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 7d31f578f323 Add linux-next specific files for 20251128 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12e42192580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ec890b8333fce099 dashboard link: https://syzkaller.appspot.com/bug?extid=405dcd13121ff75a9e16 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10de0512580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17392512580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/9bcc6eb60940/disk-7d31f578.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/895bc1bfae48/vmlinux-7d31f578.xz kernel image: https://storage.googleapis.com/syzbot-assets/48f15e4679f3/bzImage-7d31f578.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+405dcd13121ff75a9e16@syzkaller.appspotmail.com pvrusb2: Invalid read control endpoint ------------[ cut here ]------------ URB ffff88814e172b00 submitted while active WARNING: drivers/usb/core/urb.c:380 at 0x0, CPU#0: pvrusb2-context/2345 Modules linked in: CPU: 0 UID: 0 PID: 2345 Comm: pvrusb2-context Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:usb_submit_urb+0x7e/0x18d0 drivers/usb/core/urb.c:380 Code: 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 07 cf 20 fb 49 83 3e 00 74 40 e8 6c 82 ba fa 48 8d 3d e5 1e c8 08 48 89 de <67> 48 0f b9 3a b8 f0 ff ff ff eb 11 e8 51 82 ba fa eb 05 e8 4a 82 RSP: 0018:ffffc90004f268a0 EFLAGS: 00010293 RAX: ffffffff870770c4 RBX: ffff88814e172b00 RCX: ffff88802a5c8000 RDX: 0000000000000000 RSI: ffff88814e172b00 RDI: ffffffff8fcf8fb0 RBP: ffffc90004f26b00 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1f85a8f R12: 0000000000000cc0 R13: ffff88806783d5f8 R14: ffff88814e172b08 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888125a03000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f910bc43e9c CR3: 000000000e13a000 CR4: 00000000003526f0 Call Trace: pvr2_send_request_ex+0xc2a/0x2030 drivers/media/usb/pvrusb2/pvrusb2-hdw.c:3676 pvr2_send_request+0x38/0x50 drivers/media/usb/pvrusb2/pvrusb2-hdw.c:3819 pvr2_i2c_read drivers/media/usb/pvrusb2/pvrusb2-i2c-core.c:130 [inline] pvr2_i2c_basic_op+0x44e/0x930 drivers/media/usb/pvrusb2/pvrusb2-i2c-core.c:172 pvr2_i2c_xfer+0x9e3/0xda0 drivers/media/usb/pvrusb2/pvrusb2-i2c-core.c:445 __i2c_transfer+0x871/0x2110 drivers/i2c/i2c-core-base.c:-1 i2c_smbus_xfer_emulated drivers/i2c/i2c-core-smbus.c:470 [inline] __i2c_smbus_xfer+0xf80/0x1e40 drivers/i2c/i2c-core-smbus.c:608 i2c_smbus_xfer+0x275/0x3c0 drivers/i2c/i2c-core-smbus.c:546 i2c_smbus_read_byte_data+0xfe/0x1c0 drivers/i2c/i2c-core-smbus.c:143 saa711x_detect_chip drivers/media/i2c/saa7115.c:1710 [inline] saa711x_probe+0x1c1/0x1570 drivers/media/i2c/saa7115.c:1816 i2c_device_probe+0x87e/0xc00 drivers/i2c/i2c-core-base.c:592 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0xad0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x320 drivers/base/dd.c:801 driver_probe_device+0x4f/0x240 drivers/base/dd.c:831 __device_attach_driver+0x279/0x430 drivers/base/dd.c:959 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:500 __device_attach+0x2b8/0x430 drivers/base/dd.c:1031 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1086 bus_probe_device+0x12a/0x220 drivers/base/bus.c:574 device_add+0x7b6/0xb80 drivers/base/core.c:3689 i2c_new_client_device+0xa11/0x1150 drivers/i2c/i2c-core-base.c:1019 v4l2_i2c_new_subdev_board+0x86/0x250 drivers/media/v4l2-core/v4l2-i2c.c:81 v4l2_i2c_new_subdev+0x14a/0x1e0 drivers/media/v4l2-core/v4l2-i2c.c:136 pvr2_hdw_load_subdev drivers/media/usb/pvrusb2/pvrusb2-hdw.c:-1 [inline] pvr2_hdw_load_modules drivers/media/usb/pvrusb2/pvrusb2-hdw.c:2074 [inline] pvr2_hdw_setup_low drivers/media/usb/pvrusb2/pvrusb2-hdw.c:2155 [inline] pvr2_hdw_setup drivers/media/usb/pvrusb2/pvrusb2-hdw.c:2261 [inline] pvr2_hdw_initialize+0xe18/0x3ac0 drivers/media/usb/pvrusb2/pvrusb2-hdw.c:2338 pvr2_context_check drivers/media/usb/pvrusb2/pvrusb2-context.c:111 [inline] pvr2_context_thread_func+0x487/0xaf0 drivers/media/usb/pvrusb2/pvrusb2-context.c:158 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 ---------------- Code disassembly (best guess): 0: 89 f0 mov %esi,%eax 2: 48 c1 e8 03 shr $0x3,%rax 6: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) b: 74 08 je 0x15 d: 4c 89 f7 mov %r14,%rdi 10: e8 07 cf 20 fb call 0xfb20cf1c 15: 49 83 3e 00 cmpq $0x0,(%r14) 19: 74 40 je 0x5b 1b: e8 6c 82 ba fa call 0xfaba828c 20: 48 8d 3d e5 1e c8 08 lea 0x8c81ee5(%rip),%rdi # 0x8c81f0c 27: 48 89 de mov %rbx,%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: b8 f0 ff ff ff mov $0xfffffff0,%eax 34: eb 11 jmp 0x47 36: e8 51 82 ba fa call 0xfaba828c 3b: eb 05 jmp 0x42 3d: e8 .byte 0xe8 3e: 4a rex.WX 3f: 82 .byte 0x82 --- 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 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. 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