[ 97.373287][ T55] cfg80211: failed to load regulatory.db Warning: Permanently added '10.128.1.49' (ED25519) to the list of known hosts. executing program [ 99.187321][ T5060] [ 99.189688][ T5060] ================================ [ 99.194797][ T5060] WARNING: inconsistent lock state [ 99.199907][ T5060] 6.7.0-rc1-next-20231116-syzkaller #0 Not tainted [ 99.206410][ T5060] -------------------------------- [ 99.211521][ T5060] inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. [ 99.218392][ T5060] syz-executor240/5060 [HC0[0]:SC0[0]:HE1:SE1] takes: [ 99.225192][ T5060] ffff888019f840d8 (&sighand->siglock){?...}-{2:2}, at: ptrace_attach+0x401/0x650 [ 99.234664][ T5060] {IN-HARDIRQ-W} state was registered at: [ 99.240431][ T5060] lock_acquire+0x1b1/0x530 [ 99.245043][ T5060] _raw_spin_lock_irqsave+0x3a/0x50 [ 99.250362][ T5060] __lock_task_sighand+0xc2/0x340 [ 99.255504][ T5060] send_sigqueue+0x1d4/0x840 [ 99.260295][ T5060] posix_timer_fn+0x181/0x3d0 [ 99.265118][ T5060] __hrtimer_run_queues+0x20c/0xc20 [ 99.270426][ T5060] hrtimer_interrupt+0x31b/0x800 [ 99.275468][ T5060] __sysvec_apic_timer_interrupt+0x10c/0x410 [ 99.282088][ T5060] sysvec_apic_timer_interrupt+0x90/0xb0 [ 99.288195][ T5060] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 99.294304][ T5060] _raw_spin_unlock_irqrestore+0x31/0x70 [ 99.300041][ T5060] do_timer_settime+0x260/0x2f0 [ 99.305015][ T5060] __x64_sys_timer_settime+0x266/0x2c0 [ 99.310619][ T5060] do_syscall_64+0x40/0x110 [ 99.315225][ T5060] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 99.321320][ T5060] irq event stamp: 361 [ 99.325385][ T5060] hardirqs last enabled at (361): [] _raw_spin_unlock_irqrestore+0x4e/0x70 [ 99.335642][ T5060] hardirqs last disabled at (360): [] _raw_spin_lock_irqsave+0x4e/0x50 [ 99.345464][ T5060] softirqs last enabled at (290): [] fpu_clone+0x342/0xb60 [ 99.354338][ T5060] softirqs last disabled at (288): [] fpu_clone+0x2d7/0xb60 [ 99.363213][ T5060] [ 99.363213][ T5060] other info that might help us debug this: [ 99.371277][ T5060] Possible unsafe locking scenario: [ 99.371277][ T5060] [ 99.378900][ T5060] CPU0 [ 99.382185][ T5060] ---- [ 99.385553][ T5060] lock(&sighand->siglock); [ 99.390169][ T5060] [ 99.393627][ T5060] lock(&sighand->siglock); [ 99.398437][ T5060] [ 99.398437][ T5060] *** DEADLOCK *** [ 99.398437][ T5060] [ 99.406580][ T5060] 2 locks held by syz-executor240/5060: [ 99.412133][ T5060] #0: ffff888025c14f88 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: ptrace_attach+0x1eb/0x650 [ 99.422271][ T5060] #1: ffffffff8cc0a098 (tasklist_lock){++++}-{2:2}, at: ptrace_attach+0x2c3/0x650 [ 99.431643][ T5060] [ 99.431643][ T5060] stack backtrace: [ 99.437539][ T5060] CPU: 1 PID: 5060 Comm: syz-executor240 Not tainted 6.7.0-rc1-next-20231116-syzkaller #0 [ 99.447444][ T5060] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 [ 99.457507][ T5060] Call Trace: [ 99.460803][ T5060] [ 99.463745][ T5060] dump_stack_lvl+0xd9/0x1b0 [ 99.468362][ T5060] mark_lock+0x91a/0xc50 [ 99.472623][ T5060] ? print_usage_bug.part.0+0x550/0x550 [ 99.478193][ T5060] ? try_to_wake_up+0x13f/0x13d0 [ 99.483150][ T5060] ? reacquire_held_locks+0x4c0/0x4c0 [ 99.488548][ T5060] __lock_acquire+0x919/0x3b10 [ 99.493360][ T5060] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 99.499356][ T5060] ? send_sig_info+0xe9/0x150 [ 99.504072][ T5060] lock_acquire+0x1b1/0x530 [ 99.508590][ T5060] ? ptrace_attach+0x401/0x650 [ 99.513388][ T5060] ? lock_sync+0x190/0x190 [ 99.517818][ T5060] ? lockdep_hardirqs_on+0x7c/0x110 [ 99.523049][ T5060] ? _raw_spin_unlock_irqrestore+0x3b/0x70 [ 99.528874][ T5060] ? send_sig_info+0xf3/0x150 [ 99.533572][ T5060] ? do_raw_write_lock+0x11d/0x3a0 [ 99.538701][ T5060] ? get_signal+0x2770/0x2770 [ 99.543399][ T5060] ? do_raw_read_unlock+0xe0/0xe0 [ 99.548447][ T5060] _raw_spin_lock+0x2e/0x40 [ 99.552974][ T5060] ? ptrace_attach+0x401/0x650 [ 99.557772][ T5060] ptrace_attach+0x401/0x650 [ 99.562410][ T5060] __do_sys_ptrace+0x204/0x230 [ 99.567206][ T5060] do_syscall_64+0x40/0x110 [ 99.571738][ T5060] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 99.577663][ T5060] RIP: 0033:0x7f966c134f89 [ 99.582095][ T5060] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 [ 99.601809][ T5060] RSP: 002b:00007f966c0f6238 EFLAGS: 00000246 ORIG_RAX: 0000000000000065 [ 99.610278][ T5060] RAX: ffffffffffffffda RBX: 00007f966c1bf308 RCX: 00007f966c134f89 [ 99.618307][ T5060] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000010 [ 99.626293][ T5060] RBP: 00007f966c1bf300 R08: 00007f966c0f66c0 R09: 00007f966c0f66c0 [ 99.634281][ T5060] R10: 0000000000000000 R11: 000000000