input: Steam Controller as /devices/platform/dummy_hcd.2/usb3/3-1/3-1:0.0/0003:28DE:1102.0005/input/input10 ====================================================== WARNING: possible circular locking dependency detected 5.15.178-syzkaller #0 Not tainted ------------------------------------------------------ syz.2.681/7232 is trying to acquire lock: ffffffff8d74f108 (input_mutex){+.+.}-{3:3}, at: input_register_device+0xb81/0x1150 drivers/input/input.c:2422 but task is already holding lock: ffff888063c51ee0 (&hdev->ll_open_lock){+.+.}-{3:3}, at: hid_hw_close+0x2c/0xd0 drivers/hid/hid-core.c:2142 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&hdev->ll_open_lock){+.+.}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_killable_nested+0x17/0x20 kernel/locking/mutex.c:758 hid_hw_open+0x24/0x160 drivers/hid/hid-core.c:2116 input_open_device+0x188/0x2d0 drivers/input/input.c:640 kbd_connect+0xe5/0x120 drivers/tty/vt/keyboard.c:1581 input_attach_handler drivers/input/input.c:1046 [inline] input_register_device+0xdae/0x1150 drivers/input/input.c:2429 hidinput_connect+0x2044/0x28b0 drivers/hid/hid-input.c:2030 hid_connect+0x45f/0xd50 drivers/hid/hid-core.c:1972 hid_hw_start+0x99/0x100 drivers/hid/hid-core.c:2079 hid_device_probe+0x341/0x3a0 drivers/hid/hid-core.c:2311 really_probe+0x24e/0xb60 drivers/base/dd.c:595 __driver_probe_device+0x1a2/0x3d0 drivers/base/dd.c:755 driver_probe_device+0x50/0x420 drivers/base/dd.c:785 __device_attach_driver+0x2b9/0x500 drivers/base/dd.c:907 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:429 __device_attach+0x359/0x570 drivers/base/dd.c:979 bus_probe_device+0xba/0x1e0 drivers/base/bus.c:489 device_add+0xb48/0xfd0 drivers/base/core.c:3412 hid_add_device+0x3a5/0x510 drivers/hid/hid-core.c:2459 usbhid_probe+0xb32/0xec0 drivers/hid/usbhid/hid-core.c:1424 usb_probe_interface+0x5c0/0xaf0 drivers/usb/core/driver.c:396 really_probe+0x24e/0xb60 drivers/base/dd.c:595 __driver_probe_device+0x1a2/0x3d0 drivers/base/dd.c:755 driver_probe_device+0x50/0x420 drivers/base/dd.c:785 __device_attach_driver+0x2b9/0x500 drivers/base/dd.c:907 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:429 __device_attach+0x359/0x570 drivers/base/dd.c:979 bus_probe_device+0xba/0x1e0 drivers/base/bus.c:489 device_add+0xb48/0xfd0 drivers/base/core.c:3412 usb_set_configuration+0x19dd/0x2020 drivers/usb/core/message.c:2165 usb_generic_driver_probe+0x84/0x140 drivers/usb/core/generic.c:238 usb_probe_device+0x130/0x260 drivers/usb/core/driver.c:293 really_probe+0x24e/0xb60 drivers/base/dd.c:595 __driver_probe_device+0x1a2/0x3d0 drivers/base/dd.c:755 driver_probe_device+0x50/0x420 drivers/base/dd.c:785 __device_attach_driver+0x2b9/0x500 drivers/base/dd.c:907 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:429 __device_attach+0x359/0x570 drivers/base/dd.c:979 bus_probe_device+0xba/0x1e0 drivers/base/bus.c:489 device_add+0xb48/0xfd0 drivers/base/core.c:3412 usb_new_device+0xc21/0x18f0 drivers/usb/core/hub.c:2593 hub_port_connect drivers/usb/core/hub.c:5457 [inline] hub_port_connect_change drivers/usb/core/hub.c:5597 [inline] port_event drivers/usb/core/hub.c:5743 [inline] hub_event+0x2cdf/0x54c0 drivers/usb/core/hub.c:5825 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 -> #1 (&dev->mutex#2){+.+.}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_interruptible_nested+0x17/0x20 kernel/locking/mutex.c:765 input_register_handle+0x69/0x3a0 drivers/input/input.c:2588 kbd_connect+0xbb/0x120 drivers/tty/vt/keyboard.c:1577 input_attach_handler drivers/input/input.c:1046 [inline] input_register_device+0xdae/0x1150 drivers/input/input.c:2429 acpi_button_add+0x62d/0x9f0 drivers/acpi/button.c:579 acpi_device_probe+0xa3/0x2f0 drivers/acpi/bus.c:1013 really_probe+0x24e/0xb60 drivers/base/dd.c:595 __driver_probe_device+0x1a2/0x3d0 drivers/base/dd.c:755 driver_probe_device+0x50/0x420 drivers/base/dd.c:785 __driver_attach+0x479/0x690 drivers/base/dd.c:1164 bus_for_each_dev+0x17c/0x1f0 drivers/base/bus.c:303 bus_add_driver+0x334/0x600 drivers/base/bus.c:620 driver_register+0x2bf/0x3a0 drivers/base/driver.c:240 do_one_initcall+0x22b/0x7a0 init/main.c:1302 do_initcall_level+0x157/0x210 init/main.c:1375 do_initcalls+0x49/0x90 init/main.c:1391 kernel_init_freeable+0x425/0x5c0 init/main.c:1615 kernel_init+0x19/0x290 init/main.c:1506 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 -> #0 (input_mutex){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_interruptible_nested+0x17/0x20 kernel/locking/mutex.c:765 input_register_device+0xb81/0x1150 drivers/input/input.c:2422 steam_input_register+0x947/0xbd0 drivers/hid/hid-steam.c:469 hid_hw_close+0xa4/0xd0 drivers/hid/hid-core.c:2144 drop_ref drivers/hid/hidraw.c:338 [inline] hidraw_release+0x3bd/0x600 drivers/hid/hidraw.c:360 __fput+0x3fe/0x8e0 fs/file_table.c:280 task_work_run+0x129/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Chain exists of: input_mutex --> &dev->mutex#2 --> &hdev->ll_open_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&hdev->ll_open_lock); lock(&dev->mutex#2); lock(&hdev->ll_open_lock); lock(input_mutex); *** DEADLOCK *** 2 locks held by syz.2.681/7232: #0: ffffffff8dac2ea8 (minors_lock){+.+.}-{3:3}, at: hidraw_release+0x74/0x600 drivers/hid/hidraw.c:351 #1: ffff888063c51ee0 (&hdev->ll_open_lock){+.+.}-{3:3}, at: hid_hw_close+0x2c/0xd0 drivers/hid/hid-core.c:2142 stack backtrace: CPU: 1 PID: 7232 Comm: syz.2.681 Not tainted 5.15.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_interruptible_nested+0x17/0x20 kernel/locking/mutex.c:765 input_register_device+0xb81/0x1150 drivers/input/input.c:2422 steam_input_register+0x947/0xbd0 drivers/hid/hid-steam.c:469 hid_hw_close+0xa4/0xd0 drivers/hid/hid-core.c:2144 drop_ref drivers/hid/hidraw.c:338 [inline] hidraw_release+0x3bd/0x600 drivers/hid/hidraw.c:360 __fput+0x3fe/0x8e0 fs/file_table.c:280 task_work_run+0x129/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f82fd725169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff14f12cb8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 0000000000057428 RCX: 00007f82fd725169 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f82fd93fba0 R08: 0000000000000001 R09: 0000000714f12faf R10: 00007f82fd598000 R11: 0000000000000246 R12: 00007f82fd93dfac R13: 00007f82fd93dfa0 R14: ffffffffffffffff R15: 00007fff14f12dd0