./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3285950272 <...> Warning: Permanently added '10.128.0.144' (ED25519) to the list of known hosts. execve("./syz-executor3285950272", ["./syz-executor3285950272"], 0x7ffd21fef0f0 /* 10 vars */) = 0 brk(NULL) = 0x55556c144000 brk(0x55556c144d00) = 0x55556c144d00 arch_prctl(ARCH_SET_FS, 0x55556c144380) = 0 set_tid_address(0x55556c144650) = 5082 set_robust_list(0x55556c144660, 24) = 0 rseq(0x55556c144ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3285950272", 4096) = 28 getrandom("\x5c\x9f\xe4\x6b\x53\x6a\x66\xaf", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556c144d00 brk(0x55556c165d00) = 0x55556c165d00 brk(0x55556c166000) = 0x55556c166000 mprotect(0x7fdf05a00000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 openat(AT_FDCWD, "/dev/uinput", O_RDONLY) = 3 ioctl(3, UI_DEV_SETUP, 0x20000180) = 0 ioctl(3, UI_SET_FFBIT, 0x51) = 0 ioctl(3, UI_DEV_CREATE or USB_RAW_IOCTL_RUN, 0) = 0 openat(AT_FDCWD, "/dev/input/event4", O_RDONLY) = 4 [ 58.275716][ T5082] input: syz1 as /devices/virtual/input/input5 [ 58.312125][ T5082] [ 58.314504][ T5082] ====================================================== [ 58.321502][ T5082] WARNING: possible circular locking dependency detected [ 58.328513][ T5082] 6.9.0-rc6-syzkaller-00227-g3d25a941ea50 #0 Not tainted [ 58.335526][ T5082] ------------------------------------------------------ [ 58.342537][ T5082] syz-executor328/5082 is trying to acquire lock: [ 58.348934][ T5082] ffff88802240b070 (&newdev->mutex){+.+.}-{3:3}, at: uinput_request_submit+0x19c/0x740 [ 58.358636][ T5082] [ 58.358636][ T5082] but task is already holding lock: [ 58.366047][ T5082] ffff88802aed10b0 (&ff->mutex){+.+.}-{3:3}, at: input_ff_upload+0x3e4/0xb00 [ 58.374844][ T5082] [ 58.374844][ T5082] which lock already depends on the new lock. [ 58.374844][ T5082] [ 58.385322][ T5082] [ 58.385322][ T5082] the existing dependency chain (in reverse order) is: [ 58.394324][ T5082] [ 58.394324][ T5082] -> #3 (&ff->mutex){+.+.}-{3:3}: [ 58.401528][ T5082] lock_acquire+0x1ed/0x550 [ 58.406549][ T5082] __mutex_lock+0x136/0xd70 [ 58.411592][ T5082] input_ff_flush+0x5e/0x140 [ 58.416703][ T5082] input_flush_device+0x9c/0xc0 [ 58.422072][ T5082] evdev_release+0xf9/0x7d0 [ 58.427087][ T5082] __fput+0x429/0x8a0 [ 58.431584][ T5082] __x64_sys_close+0x7f/0x110 [ 58.436807][ T5082] do_syscall_64+0xf5/0x240 [ 58.441854][ T5082] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 58.448270][ T5082] [ 58.448270][ T5082] -> #2 (&dev->mutex#2){+.+.}-{3:3}: [ 58.455749][ T5082] lock_acquire+0x1ed/0x550 [ 58.460779][ T5082] __mutex_lock+0x136/0xd70 [ 58.465897][ T5082] input_register_handle+0x6d/0x3b0 [ 58.471614][ T5082] kbd_connect+0xbf/0x130 [ 58.476462][ T5082] input_register_device+0xcfa/0x1090 [ 58.482352][ T5082] acpi_button_add+0x6c6/0xb90 [ 58.487630][ T5082] acpi_device_probe+0xa5/0x2b0 [ 58.493007][ T5082] really_probe+0x2b8/0xad0 [ 58.498125][ T5082] __driver_probe_device+0x1a2/0x390 [ 58.503930][ T5082] driver_probe_device+0x50/0x430 [ 58.509470][ T5082] __driver_attach+0x45f/0x710 [ 58.514777][ T5082] bus_for_each_dev+0x239/0x2b0 [ 58.520148][ T5082] bus_add_driver+0x347/0x620 [ 58.525778][ T5082] driver_register+0x23a/0x320 [ 58.531063][ T5082] do_one_initcall+0x248/0x880 [ 58.536349][ T5082] do_initcall_level+0x157/0x210 [ 58.541820][ T5082] do_initcalls+0x3f/0x80 [ 58.546756][ T5082] kernel_init_freeable+0x435/0x5d0 [ 58.552474][ T5082] kernel_init+0x1d/0x2b0 [ 58.557372][ T5082] ret_from_fork+0x4b/0x80 [ 58.562305][ T5082] ret_from_fork_asm+0x1a/0x30 [ 58.567629][ T5082] [ 58.567629][ T5082] -> #1 (input_mutex){+.+.}-{3:3}: [ 58.575192][ T5082] lock_acquire+0x1ed/0x550 [ 58.580216][ T5082] __mutex_lock+0x136/0xd70 [ 58.585322][ T5082] input_register_device+0xae5/0x1090 [ 58.591209][ T5082] uinput_create_device+0x40e/0x630 [ 58.596921][ T5082] uinput_ioctl_handler+0x48b/0x1770 [ 58.602834][ T5082] __se_sys_ioctl+0xfc/0x170 [ 58.608203][ T5082] do_syscall_64+0xf5/0x240 [ 58.613235][ T5082] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 58.619756][ T5082] [ 58.619756][ T5082] -> #0 (&newdev->mutex){+.+.}-{3:3}: [ 58.627319][ T5082] validate_chain+0x18cb/0x58e0 [ 58.632775][ T5082] __lock_acquire+0x1346/0x1fd0 [ 58.638135][ T5082] lock_acquire+0x1ed/0x550 [ 58.643148][ T5082] __mutex_lock+0x136/0xd70 [ 58.648164][ T5082] uinput_request_submit+0x19c/0x740 [ 58.653988][ T5082] uinput_dev_upload_effect+0x199/0x240 [ 58.660049][ T5082] input_ff_upload+0x5df/0xb00 [ 58.665328][ T5082] evdev_ioctl_handler+0x17d0/0x21b0 [ 58.671396][ T5082] __se_sys_ioctl+0xfc/0x170 [ 58.676506][ T5082] do_syscall_64+0xf5/0x240 [ 58.681526][ T5082] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 58.687932][ T5082] [ 58.687932][ T5082] other info that might help us debug this: [ 58.687932][ T5082] [ 58.698181][ T5082] Chain exists of: [ 58.698181][ T5082] &newdev->mutex --> &dev->mutex#2 --> &ff->mutex [ 58.698181][ T5082] [ 58.710529][ T5082] Possible unsafe locking scenario: [ 58.710529][ T5082] [ 58.717967][ T5082] CPU0 CPU1 [ 58.723331][ T5082] ---- ---- [ 58.728683][ T5082] lock(&ff->mutex); [ 58.732659][ T5082] lock(&dev->mutex#2); [ 58.739418][ T5082] lock(&ff->mutex); [ 58.745934][ T5082] lock(&newdev->mutex); [ 58.750271][ T5082] [ 58.750271][ T5082] *** DEADLOCK *** [ 58.750271][ T5082] [ 58.758402][ T5082] 2 locks held by syz-executor328/5082: [ 58.763934][ T5082] #0: ffff88801abad110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_ioctl_handler+0x125/0x21b0 [ 58.773852][ T5082] #1: ffff88802aed10b0 (&ff->mutex){+.+.}-{3:3}, at: input_ff_upload+0x3e4/0xb00 [ 58.783077][ T5082] [ 58.783077][ T5082] stack backtrace: [ 58.788954][ T5082] CPU: 1 PID: 5082 Comm: syz-executor328 Not tainted 6.9.0-rc6-syzkaller-00227-g3d25a941ea50 #0 [ 58.799357][ T5082] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 58.809410][ T5082] Call Trace: [ 58.812683][ T5082] [ 58.815607][ T5082] dump_stack_lvl+0x241/0x360 [ 58.820304][ T5082] ? __pfx_dump_stack_lvl+0x10/0x10 [ 58.825501][ T5082] ? print_circular_bug+0x130/0x1a0 [ 58.830692][ T5082] check_noncircular+0x36a/0x4a0 [ 58.835677][ T5082] ? __pfx_check_noncircular+0x10/0x10 [ 58.841133][ T5082] ? lockdep_lock+0x123/0x2b0 [ 58.845799][ T5082] ? stack_trace_save+0x118/0x1d0 [ 58.850906][ T5082] ? __pfx_stack_trace_save+0x10/0x10 [ 58.856362][ T5082] ? _find_first_zero_bit+0xd4/0x100 [ 58.861667][ T5082] validate_chain+0x18cb/0x58e0 [ 58.866529][ T5082] ? validate_chain+0x15a2/0x58e0 [ 58.871546][ T5082] ? __pfx_validate_chain+0x10/0x10 [ 58.876744][ T5082] ? __pfx_validate_chain+0x10/0x10 [ 58.881938][ T5082] ? stack_trace_save+0x118/0x1d0 [ 58.886970][ T5082] ? __pfx_stack_trace_save+0x10/0x10 [ 58.892338][ T5082] ? mark_lock+0x9a/0x350 [ 58.896660][ T5082] __lock_acquire+0x1346/0x1fd0 [ 58.901509][ T5082] lock_acquire+0x1ed/0x550 [ 58.906003][ T5082] ? uinput_request_submit+0x19c/0x740 [ 58.911460][ T5082] ? __pfx_lock_acquire+0x10/0x10 [ 58.916563][ T5082] ? __pfx___might_resched+0x10/0x10 [ 58.921840][ T5082] ? lock_acquire+0x264/0x550 [ 58.926518][ T5082] __mutex_lock+0x136/0xd70 [ 58.931012][ T5082] ? uinput_request_submit+0x19c/0x740 [ 58.936467][ T5082] ? uinput_request_alloc_id+0x3c5/0x3f0 [ 58.942094][ T5082] ? do_raw_spin_lock+0x14f/0x370 [ 58.947124][ T5082] ? __pfx_lock_release+0x10/0x10 [ 58.952165][ T5082] ? uinput_request_submit+0x19c/0x740 [ 58.957616][ T5082] ? __pfx___mutex_lock+0x10/0x10 [ 58.962633][ T5082] ? _raw_spin_unlock+0x28/0x50 [ 58.967475][ T5082] ? uinput_request_alloc_id+0x3c5/0x3f0 [ 58.973101][ T5082] uinput_request_submit+0x19c/0x740 [ 58.978388][ T5082] ? __pfx_uinput_request_submit+0x10/0x10 [ 58.984280][ T5082] ? __pfx___mutex_trylock_common+0x10/0x10 [ 58.990173][ T5082] ? rcu_is_watching+0x15/0xb0 [ 58.994932][ T5082] uinput_dev_upload_effect+0x199/0x240 [ 59.000472][ T5082] ? __pfx_uinput_dev_upload_effect+0x10/0x10 [ 59.006626][ T5082] input_ff_upload+0x5df/0xb00 [ 59.011389][ T5082] evdev_ioctl_handler+0x17d0/0x21b0 [ 59.016674][ T5082] ? tomoyo_path_number_perm+0x208/0x880 [ 59.022301][ T5082] ? __pfx_evdev_ioctl_handler+0x10/0x10 [ 59.027940][ T5082] ? __pfx_ptrace_notify+0x10/0x10 [ 59.033050][ T5082] ? bpf_lsm_file_ioctl+0x9/0x10 [ 59.037985][ T5082] ? security_file_ioctl+0x87/0xb0 [ 59.043124][ T5082] ? __pfx_evdev_ioctl+0x10/0x10 [ 59.048053][ T5082] __se_sys_ioctl+0xfc/0x170 [ 59.052657][ T5082] do_syscall_64+0xf5/0x240 [ 59.057155][ T5082] ? clear_bhb_loop+0x35/0x90 [ 59.061844][ T5082] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 59.067728][ T5082] RIP: 0033:0x7fdf0598d269 [ 59.072138][ T5082] Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 [ 59.091742][ T5082] RSP: 002b:00007ffd88f2a448 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 59.100147][ T5082] RAX: ffffffffffffffda RBX: 00007ffd88f2a618 RCX: 00007fdf0598d269 [ 59.108108][ T5082] RDX: 0000000020000300 RSI: 0000000040304580 RDI: 0000000000000004 [ 59.116069][ T5082] RBP: 00007fdf05a00610 R08: 0000000000000000 R09: 00007ffd88f2a618 [ 59.124031][ T5082] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 59.131995][ T5082] R13: 00007ffd88f2a608 R14: 0000000000000001 R15: 0000000000000001 [ 59.139970][ T5082]