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with SMTP id 006d021491bc7-6b6fc5dccfemr1266992eaf.19.1788469171103; Thu, 03 Sep 2026 13:59:31 -0700 (PDT) Date: Thu, 03 Sep 2026 13:59:31 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a99dfb3.9266084e.bf0d7.027e.GAE@google.com> Subject: [syzbot] [media?] WARNING in cx25840_init 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: 940de590b839 Merge tag 'hardening-v7.3-rc2' of git://git.k.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=10c8cb49580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5e4e3a0e188a497e dashboard link: https://syzkaller.appspot.com/bug?extid=9123948aef13fe92d706 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=17faf0f9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14d948f9580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5902f4c02b2e/disk-940de590.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/3473a7c7a754/vmlinux-940de590.xz kernel image: https://storage.googleapis.com/syzbot-assets/010eec830bfe/bzImage-940de590.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9123948aef13fe92d706@syzkaller.appspotmail.com dvb-usb: bulk message failed: -71 (9/0) dvb-usb: bulk message failed: -71 (9/0) dvb-usb: bulk message failed: -71 (6/0) dvb-usb: bulk message failed: -71 (9/0) dvb-usb: bulk message failed: -71 (6/0) dvb-usb: bulk message failed: -71 (9/0) dvb-usb: bulk message failed: -71 (6/0) dvb-usb: bulk message failed: -71 (9/0) dvb-usb: bulk message failed: -71 (9/0) ------------[ cut here ]------------ 1 WARNING: drivers/media/i2c/cx25840/cx25840-core.c:2313 at cx25840_init+0xa3/0x110 drivers/media/i2c/cx25840/cx25840-core.c:2313, CPU#0: kworker/0:2/983 Modules linked in: CPU: 0 UID: 0 PID: 983 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:cx25840_init+0xa3/0x110 drivers/media/i2c/cx25840/cx25840-core.c:2313 Code: e4 02 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 20 84 c0 75 5e 41 c7 06 2a b5 2a 01 89 de e8 c5 66 00 00 eb 09 e8 fe db c2 f9 90 <0f> 0b 90 31 c0 5b 41 5c 41 5e 41 5f 5d e9 d6 61 0b f9 cc 89 f9 80 RSP: 0018:ffffc90004a06bd0 EFLAGS: 00010293 RAX: ffffffff8804df22 RBX: 00000000000ac8aa RCX: ffff8880271f3e80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000000 R08: ffff8880226e01bb R09: 1ffff110044dc037 R10: dffffc0000000000 R11: ffffffff8804de80 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff88801bb05040 R15: ffff88801bb05338 FS: 0000000000000000(0000) GS:ffff888124cda000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f938c09caa0 CR3: 000000007f389000 CR4: 0000000000350ef0 Call Trace: cxusb_medion_register_analog_subdevs drivers/media/usb/dvb-usb/cxusb-analog.c:1730 [inline] cxusb_medion_register_analog+0x307/0x1130 drivers/media/usb/dvb-usb/cxusb-analog.c:1793 cxusb_probe+0x664/0x710 drivers/media/usb/dvb-usb/cxusb.c:1615 usb_probe_interface+0x788/0xe50 drivers/usb/core/driver.c:399 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620 device_add+0x7d7/0xb80 drivers/base/core.c:3776 usb_set_configuration+0x1ad8/0x2180 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620 device_add+0x7d7/0xb80 drivers/base/core.c:3776 usb_new_device+0x9aa/0x1690 drivers/usb/core/hub.c:2708 hub_port_connect drivers/usb/core/hub.c:5580 [inline] hub_port_connect_change drivers/usb/core/hub.c:5720 [inline] port_event drivers/usb/core/hub.c:5884 [inline] hub_event+0x28e8/0x4d30 drivers/usb/core/hub.c:5966 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560 kthread+0x38b/0x480 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 --- 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