Hello, syzbot found the following issue on: HEAD commit: e7d3b9f28654 usb: yurex: Fix inconsistent locking bug in y.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=1766e845e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=1dd225f9d04a5286 dashboard link: https://syzkaller.appspot.com/bug?extid=617f4ccb03b9869f6494 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5bf2bb53c85f/disk-e7d3b9f2.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5f6e5a287ee7/vmlinux-e7d3b9f2.xz kernel image: https://storage.googleapis.com/syzbot-assets/8259e694a7e3/bzImage-e7d3b9f2.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+617f4ccb03b9869f6494@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ add_uevent_var: buffer size too small WARNING: CPU: 0 PID: 2442 at lib/kobject_uevent.c:671 add_uevent_var+0x32d/0x390 lib/kobject_uevent.c:671 Modules linked in: CPU: 0 PID: 2442 Comm: kworker/0:6 Not tainted 6.7.0-rc5-syzkaller-ge7d3b9f28654 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Workqueue: usb_hub_wq hub_event RIP: 0010:add_uevent_var+0x32d/0x390 lib/kobject_uevent.c:671 Code: fb 48 c7 c7 c0 7c 4e 87 e8 50 63 d9 fa 0f 0b bb f4 ff ff ff e9 57 ff ff ff e8 0f 24 10 fb 48 c7 c7 60 7d 4e 87 e8 33 63 d9 fa <0f> 0b eb e1 4c 89 ee 48 c7 c7 a0 f5 22 89 e8 b0 d0 12 fc e9 b4 fe RSP: 0018:ffffc90001daf2b8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff888108b08000 RCX: ffffc9000c6ad000 RDX: 0000000000040000 RSI: ffffffff811733c6 RDI: 0000000000000001 RBP: ffffc90001daf3a8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 00000000006559c8 R12: 1ffff920003b5e5a R13: 00000000000007f5 R14: ffff888108b08218 R15: 00000000000007f5 FS: 0000000000000000(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb1ddf92c98 CR3: 0000000104e44000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> kobject_uevent_env+0x995/0x1800 lib/kobject_uevent.c:588 device_del+0x642/0xa50 drivers/base/core.c:3832 input_unregister_device+0xb9/0x100 drivers/input/input.c:2440 hidinput_disconnect+0x160/0x3e0 drivers/hid/hid-input.c:2388 hid_disconnect+0x143/0x1b0 drivers/hid/hid-core.c:2280 hid_hw_stop+0x16/0x70 drivers/hid/hid-core.c:2329 ms_remove+0x16/0xa0 drivers/hid/hid-microsoft.c:409 hid_device_remove+0xce/0x250 drivers/hid/hid-core.c:2689 device_remove+0xc8/0x170 drivers/base/dd.c:567 __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1295 bus_remove_device+0x22c/0x420 drivers/base/bus.c:574 device_del+0x39a/0xa50 drivers/base/core.c:3814 hid_remove_device drivers/hid/hid-core.c:2867 [inline] hid_destroy_device+0xe5/0x150 drivers/hid/hid-core.c:2887 usbhid_disconnect+0xa0/0xe0 drivers/hid/usbhid/hid-core.c:1456 usb_unbind_interface+0x1dd/0x8d0 drivers/usb/core/driver.c:461 device_remove drivers/base/dd.c:569 [inline] device_remove+0x11f/0x170 drivers/base/dd.c:561 __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1295 bus_remove_device+0x22c/0x420 drivers/base/bus.c:574 device_del+0x39a/0xa50 drivers/base/core.c:3814 usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1416 usb_disconnect+0x2e1/0x910 drivers/usb/core/hub.c:2257 hub_port_connect drivers/usb/core/hub.c:5305 [inline] hub_port_connect_change drivers/usb/core/hub.c:5605 [inline] port_event drivers/usb/core/hub.c:5765 [inline] hub_event+0x1be0/0x4f40 drivers/usb/core/hub.c:5847 process_one_work+0x884/0x15c0 kernel/workqueue.c:2627 process_scheduled_works kernel/workqueue.c:2700 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 </TASK> --- 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@xxxxxxxxxxxxxxxx. 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
