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Fri, 30 Jan 2026 00:10:01 -0800 (PST) Date: Fri, 30 Jan 2026 00:10:01 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <697c6759.a00a0220.35f26.0012.GAE@google.com> Subject: Re: [syzbot] [input?] [usb?] WARNING in asus_remove From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, xiaopei01@kylinos.cn, xiaopeitux@foxmail.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in asus_remove usb 1-1: USB disconnect, device number 2 ------------[ cut here ]------------ !work->func WARNING: kernel/workqueue.c:4292 at __flush_work+0xb43/0xc50 kernel/workqueue.c:4292, CPU#1: kworker/1:4/5981 Modules linked in: CPU: 1 UID: 0 PID: 5981 Comm: kworker/1:4 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:__flush_work+0xb43/0xc50 kernel/workqueue.c:4292 Code: 75 54 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 cc 87 37 00 90 0f 0b 90 e9 7c ff ff ff e8 be 87 37 00 90 <0f> 0b 90 31 c0 48 bb f8 f8 f8 f8 f8 f8 f8 f8 e9 64 ff ff ff e8 a4 RSP: 0018:ffffc90003a9f080 EFLAGS: 00010293 RAX: ffffffff818db1c2 RBX: 1ffff1100e8eab1c RCX: ffff88802742dac0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880747558c8 RBP: ffffc90003a9f238 R08: ffffffff903284b7 R09: 1ffffffff2065096 R10: dffffc0000000000 R11: fffffbfff2065097 R12: dffffc0000000000 R13: ffff8880747558e0 R14: 1ffff92000753e18 R15: ffff8880747558c8 FS: 0000000000000000(0000) GS:ffff888125152000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f64d7e51e9c CR3: 000000006163c000 CR4: 00000000003526f0 Call Trace: __cancel_work_sync+0xbe/0x110 kernel/workqueue.c:4451 asus_remove+0x143/0x180 drivers/hid/hid-asus.c:1355 hid_device_remove+0x228/0x370 drivers/hid/hid-core.c:-1 device_remove drivers/base/dd.c:571 [inline] __device_release_driver drivers/base/dd.c:1284 [inline] device_release_driver_internal+0x46f/0x860 drivers/base/dd.c:1307 bus_remove_device+0x34d/0x440 drivers/base/bus.c:616 device_del+0x527/0x8f0 drivers/base/core.c:3878 hid_remove_device drivers/hid/hid-core.c:3008 [inline] hid_destroy_device+0x6b/0x1b0 drivers/hid/hid-core.c:3030 usbhid_disconnect+0x9f/0xc0 drivers/hid/usbhid/hid-core.c:1477 usb_unbind_interface+0x26e/0x910 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:573 [inline] __device_release_driver drivers/base/dd.c:1284 [inline] device_release_driver_internal+0x4d9/0x860 drivers/base/dd.c:1307 bus_remove_device+0x34d/0x440 drivers/base/bus.c:616 device_del+0x527/0x8f0 drivers/base/core.c:3878 usb_disable_device+0x3d4/0x8d0 drivers/usb/core/message.c:1418 usb_disconnect+0x32f/0x990 drivers/usb/core/hub.c:2345 hub_port_connect drivers/usb/core/hub.c:5407 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x1cc9/0x4f30 drivers/usb/core/hub.c:5953 process_one_work+0x949/0x15a0 kernel/workqueue.c:3279 process_scheduled_works kernel/workqueue.c:3362 [inline] worker_thread+0xb46/0x1140 kernel/workqueue.c:3443 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Tested on: commit: 33a647c6 Add linux-next specific files for 20260129 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=11e1a5b2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=aef5831c38e37e48 dashboard link: https://syzkaller.appspot.com/bug?extid=13f8286fa2de04a7cd48 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=17fc1644580000