Hello, syzbot found the following issue on: HEAD commit: 9abbc24128bc Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=1432aac4180000 kernel config: https://syzkaller.appspot.com/x/.config?x=af5c6c699e57bbb3 dashboard link: https://syzkaller.appspot.com/bug?extid=b03b0fc32e288051502d compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=147aa106180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=150f8e22180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ce13ec3ed5ad/disk-9abbc241.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/256cbd314121/vmlinux-9abbc241.xz kernel image: https://storage.googleapis.com/syzbot-assets/0af86fb52109/Image-9abbc241.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b03b0fc32e288051502d@xxxxxxxxxxxxxxxxxxxxxxxxx microsoft 0003:045E:07DA.0009: input,hidraw0: USB HID v0.00 Device [HID 045e:07da] on usb-dummy_hcd.0-1/input0 usb 1-1: USB disconnect, device number 10 ------------[ cut here ]------------ add_uevent_var: buffer size too small WARNING: CPU: 1 PID: 1394 at lib/kobject_uevent.c:671 add_uevent_var+0x278/0x3c0 Modules linked in: CPU: 1 PID: 1394 Comm: kworker/1:2 Tainted: G B 6.8.0-rc5-syzkaller-g9abbc24128bc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: usb_hub_wq hub_event pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : add_uevent_var+0x278/0x3c0 lr : add_uevent_var+0x274/0x3c0 lib/kobject_uevent.c:671 sp : ffff800098486c80 x29: ffff800098486da0 x28: 000000000000000c x27: ffff700013090d9c x26: dfff800000000000 x25: ffff0000c8e02a10 x24: 000000000000000c x23: 00000000000007f4 x22: 000000000000000c x21: ffff0000c8e02218 x20: ffff0000c8e02a1c x19: ffff0000c8e02000 x18: 1fffe00036804796 x17: 0000000000000000 x16: ffff80008ad5bbdc x15: 0000000000000001 x14: 1fffe00036804802 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000002 x10: 0000000000ff0100 x9 : c77e75592b5e9e00 x8 : c77e75592b5e9e00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800098486578 x4 : ffff80008ed715e0 x3 : ffff8000805b98b4 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 00000000fffffff4 Call trace: add_uevent_var+0x278/0x3c0 kobject_uevent_env+0x4f0/0x874 lib/kobject_uevent.c:588 kobject_uevent+0x2c/0x3c lib/kobject_uevent.c:642 device_del+0x6a8/0x87c drivers/base/core.c:3846 __input_unregister_device+0x454/0x5c0 drivers/input/input.c:2232 input_unregister_device+0xb0/0xfc drivers/input/input.c:2440 hidinput_disconnect+0x1fc/0x290 drivers/hid/hid-input.c:2388 hid_disconnect drivers/hid/hid-core.c:2280 [inline] hid_hw_stop+0x88/0x1cc drivers/hid/hid-core.c:2329 ms_remove+0x28/0x94 drivers/hid/hid-microsoft.c:409 hid_device_remove+0x1c8/0x2fc device_remove drivers/base/dd.c:567 [inline] __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x3e4/0x6a0 drivers/base/dd.c:1295 device_release_driver+0x28/0x38 drivers/base/dd.c:1318 bus_remove_device+0x314/0x3b4 drivers/base/bus.c:574 device_del+0x480/0x87c drivers/base/core.c:3828 hid_remove_device drivers/hid/hid-core.c:2867 [inline] hid_destroy_device+0x70/0x114 drivers/hid/hid-core.c:2887 usbhid_disconnect+0xa8/0xf0 drivers/hid/usbhid/hid-core.c:1456 usb_unbind_interface+0x1a4/0x758 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+0x440/0x6a0 drivers/base/dd.c:1295 device_release_driver+0x28/0x38 drivers/base/dd.c:1318 bus_remove_device+0x314/0x3b4 drivers/base/bus.c:574 device_del+0x480/0x87c drivers/base/core.c:3828 usb_disable_device+0x354/0x760 drivers/usb/core/message.c:1416 usb_disconnect+0x290/0x808 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+0x18ec/0x435c drivers/usb/core/hub.c:5865 process_one_work+0x694/0x1204 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2787 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 irq event stamp: 71432 hardirqs last enabled at (71431): [<ffff80008ae4d56c>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (71431): [<ffff80008ae4d56c>] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:202 hardirqs last disabled at (71432): [<ffff80008ae372c4>] __schedule+0x2bc/0x24b4 kernel/sched/core.c:6625 softirqs last enabled at (42430): [<ffff80008002189c>] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (42430): [<ffff80008002189c>] __do_softirq+0xac8/0xce4 kernel/softirq.c:582 softirqs last disabled at (42421): [<ffff80008002ab48>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 ---[ end trace 0000000000000000 ]--- usb 1-1: new high-speed USB device number 11 using dummy_hcd usb 1-1: Using ep0 maxpacket: 16 usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 9 usb 1-1: New USB device found, idVendor=045e, idProduct=07da, bcdDevice= 0.00 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? microsoft 0003:045E:07DA.000A: unknown main item tag 0x0 microsoft 0003:045E:07DA.000A: unknown main item tag 0x0 microsoft 0003:045E:07DA.000A: unknown main item tag 0x0 microsoft 0003:045E:07DA.000A: unknown main item tag 0x0 HID 045e:07da: Invalid code 65791 type 1 input: HID 045e:07da as /devices/platform/dummy_hcd.0/usb1/1-1/1-1:0.0/0003:045E:07DA.000A/input/input11 microsoft 0003:045E:07DA.000A: input,hidraw0: USB HID v0.00 Device [HID 045e:07da] on usb-dummy_hcd.0-1/input0 usb 1-1: USB disconnect, device number 11 ------------[ cut here ]------------ add_uevent_var: buffer size too small WARNING: CPU: 1 PID: 1394 at lib/kobject_uevent.c:671 add_uevent_var+0x278/0x3c0 Modules linked in: CPU: 1 PID: 1394 Comm: kworker/1:2 Tainted: G B W 6.8.0-rc5-syzkaller-g9abbc24128bc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: usb_hub_wq hub_event pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : add_uevent_var+0x278/0x3c0 lr : add_uevent_var+0x274/0x3c0 lib/kobject_uevent.c:671 sp : ffff800098486c80 x29: ffff800098486da0 x28: 000000000000000c x27: ffff700013090d9c x26: dfff800000000000 x25: ffff0001ffb5ea10 x24: 000000000000000c x23: 00000000000007f4 x22: 000000000000000c x21: ffff0001ffb5e218 x20: ffff0001ffb5ea1c x19: ffff0001ffb5e000 x18: 1fffe00036804796 x17: 0000000000000000 x16: ffff80008ad5bbdc x15: 0000000000000001 x14: 1fffe00036804802 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000002 x10: 0000000000ff0100 x9 : c77e75592b5e9e00 x8 : c77e75592b5e9e00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800098486578 x4 : ffff80008ed715e0 x3 : ffff8000805b98b4 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 00000000fffffff4 Call trace: add_uevent_var+0x278/0x3c0 kobject_uevent_env+0x4f0/0x874 lib/kobject_uevent.c:588 kobject_uevent+0x2c/0x3c lib/kobject_uevent.c:642 device_del+0x6a8/0x87c drivers/base/core.c:3846 __input_unregister_device+0x454/0x5c0 drivers/input/input.c:2232 input_unregister_device+0xb0/0xfc drivers/input/input.c:2440 hidinput_disconnect+0x1fc/0x290 drivers/hid/hid-input.c:2388 hid_disconnect drivers/hid/hid-core.c:2280 [inline] hid_hw_stop+0x88/0x1cc drivers/hid/hid-core.c:2329 ms_remove+0x28/0x94 drivers/hid/hid-microsoft.c:409 hid_device_remove+0x1c8/0x2fc device_remove drivers/base/dd.c:567 [inline] __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x3e4/0x6a0 drivers/base/dd.c:1295 device_release_driver+0x28/0x38 drivers/base/dd.c:1318 bus_remove_device+0x314/0x3b4 drivers/base/bus.c:574 device_del+0x480/0x87c drivers/base/core.c:3828 hid_remove_device drivers/hid/hid-core.c:2867 [inline] hid_destroy_device+0x70/0x114 drivers/hid/hid-core.c:2887 usbhid_disconnect+0xa8/0xf0 drivers/hid/usbhid/hid-core.c:1456 usb_unbind_interface+0x1a4/0x758 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+0x440/0x6a0 drivers/base/dd.c:1295 device_release_driver+0x28/0x38 drivers/base/dd.c:1318 bus_remove_device+0x314/0x3b4 drivers/base/bus.c:574 device_del+0x480/0x87c drivers/base/core.c:3828 usb_disable_device+0x354/0x760 drivers/usb/core/message.c:1416 usb_disconnect+0x290/0x808 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+0x18ec/0x435c drivers/usb/core/hub.c:5865 process_one_work+0x694/0x1204 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2787 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 irq event stamp: 71432 hardirqs last enabled at (71431): [<ffff80008ae4d56c>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (71431): [<ffff80008ae4d56c>] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:202 hardirqs last disabled at (71432): [<ffff80008ae372c4>] __schedule+0x2bc/0x24b4 kernel/sched/core.c:6625 softirqs last enabled at (42430): [<ffff80008002189c>] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (42430): [<ffff80008002189c>] __do_softirq+0xac8/0xce4 kernel/softirq.c:582 softirqs last disabled at (42421): [<ffff80008002ab48>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 ---[ end trace 0000000000000000 ]--- usb 1-1: new high-speed USB device number 12 using dummy_hcd usb 1-1: Using ep0 maxpacket: 16 usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 9 usb 1-1: New USB device found, idVendor=045e, idProduct=07da, bcdDevice= 0.00 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? microsoft 0003:045E:07DA.000B: unknown main item tag 0x0 microsoft 0003:045E:07DA.000B: unknown main item tag 0x0 microsoft 0003:045E:07DA.000B: unknown main item tag 0x0 microsoft 0003:045E:07DA.000B: unknown main item tag 0x0 HID 045e:07da: Invalid code 65791 type 1 input: HID 045e:07da as /devices/platform/dummy_hcd.0/usb1/1-1/1-1:0.0/0003:045E:07DA.000B/input/input12 microsoft 0003:045E:07DA.000B: input,hidraw0: USB HID v0.00 Device [HID 045e:07da] on usb-dummy_hcd.0-1/input0 --- 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 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
