syzbot has found a reproducer for the following issue on: HEAD commit: c1ca10ceffbb Merge tag 'scsi-fixes' of git://git.kernel.or.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15159df0180000 kernel config: https://syzkaller.appspot.com/x/.config?x=1d7c92dd8d5c7a1e dashboard link: https://syzkaller.appspot.com/bug?extid=617f4ccb03b9869f6494 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11f415fc180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17ecf362180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/842b77f831b0/disk-c1ca10ce.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/057da06d8a4b/vmlinux-c1ca10ce.xz kernel image: https://storage.googleapis.com/syzbot-assets/d4382274a169/bzImage-c1ca10ce.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+617f4ccb03b9869f6494@xxxxxxxxxxxxxxxxxxxxxxxxx input: HID 045e:07da as /devices/platform/dummy_hcd.0/usb1/1-1/1-1:0.0/0003:045E:07DA.0060/input/input100 microsoft 0003:045E:07DA.0060: input,hidraw0: USB HID v0.00 Device [HID 045e:07da] on usb-dummy_hcd.0-1/input0 usb 1-1: USB disconnect, device number 97 ------------[ cut here ]------------ add_uevent_var: buffer size too small WARNING: CPU: 0 PID: 782 at lib/kobject_uevent.c:671 add_uevent_var+0x2d5/0x450 lib/kobject_uevent.c:671 Modules linked in: CPU: 0 PID: 782 Comm: kworker/0:2 Not tainted 6.8.0-rc4-syzkaller-00331-gc1ca10ceffbb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: usb_hub_wq hub_event RIP: 0010:add_uevent_var+0x2d5/0x450 lib/kobject_uevent.c:671 Code: 0f b6 04 27 84 c0 0f 85 28 01 00 00 48 8b 44 24 18 01 18 31 c0 eb 2b e8 09 07 39 f6 90 48 c7 c7 60 e3 c5 8c e8 0c 12 fd f5 90 <0f> 0b 90 90 b8 f4 ff ff ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 6c RSP: 0018:ffffc90003d3ef20 EFLAGS: 00010246 RAX: 7e434c7b33a2b100 RBX: 00000000000007f5 RCX: ffff88801fd91dc0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90003d3f050 R08: ffffffff81577992 R09: 1ffff920007a7d84 R10: dffffc0000000000 R11: fffff520007a7d85 R12: 000000000000000b R13: 000000000000000b R14: 1ffff1100fc77443 R15: 1ffff1100fc77543 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc10ead20f0 CR3: 000000002db96000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> kobject_uevent_env+0x520/0x8f0 lib/kobject_uevent.c:588 device_del+0x812/0xa30 drivers/base/core.c:3832 input_unregister_device+0xa3/0x100 drivers/input/input.c:2440 hidinput_disconnect+0x26c/0x300 drivers/hid/hid-input.c:2388 hid_disconnect drivers/hid/hid-core.c:2280 [inline] hid_hw_stop+0x75/0x1e0 drivers/hid/hid-core.c:2329 ms_remove+0x23/0xa0 drivers/hid/hid-microsoft.c:409 hid_device_remove+0x225/0x370 device_remove drivers/base/dd.c:567 [inline] __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x4a9/0x7c0 drivers/base/dd.c:1295 bus_remove_device+0x34f/0x420 drivers/base/bus.c:574 device_del+0x580/0xa30 drivers/base/core.c:3814 hid_remove_device drivers/hid/hid-core.c:2867 [inline] hid_destroy_device+0x68/0x100 drivers/hid/hid-core.c:2887 usbhid_disconnect+0x9e/0xc0 drivers/hid/usbhid/hid-core.c:1456 usb_unbind_interface+0x1d4/0x850 drivers/usb/core/driver.c:461 device_remove drivers/base/dd.c:569 [inline] __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x503/0x7c0 drivers/base/dd.c:1295 bus_remove_device+0x34f/0x420 drivers/base/bus.c:574 device_del+0x580/0xa30 drivers/base/core.c:3814 usb_disable_device+0x3bf/0x850 drivers/usb/core/message.c:1416 usb_disconnect+0x340/0x950 drivers/usb/core/hub.c:2267 hub_port_connect drivers/usb/core/hub.c:5323 [inline] hub_port_connect_change drivers/usb/core/hub.c:5623 [inline] port_event drivers/usb/core/hub.c:5783 [inline] hub_event+0x1e62/0x50f0 drivers/usb/core/hub.c:5865 process_one_work kernel/workqueue.c:2633 [inline] process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 </TASK> --- 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.
