FAT-fs (loop7): Unrecognized mount option "6\IɊ7('@HHy_qhpDTͲ-vϖz[Q#@8x+Yь %b@mVC(Z˧ivVFߓlock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ctx->lock){....}-{2:2}: _raw_spin_lock+0x2a/0x40 __perf_event_task_sched_out+0x53b/0x18d0 __schedule+0xedd/0x2470 preempt_schedule_common+0x45/0xc0 __cond_resched+0x17/0x30 __mutex_lock+0xa3/0x14d0 __do_sys_perf_event_open+0x1eec/0x32c0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #2 (&rq->__lock){-.-.}-{2:2}: _raw_spin_lock_nested+0x30/0x40 raw_spin_rq_lock_nested+0x1e/0x30 task_fork_fair+0x63/0x4d0 sched_cgroup_fork+0x3d0/0x540 copy_process+0x4183/0x6e20 kernel_clone+0xe7/0x890 user_mode_thread+0xad/0xf0 rest_init+0x24/0x250 arch_call_rest_init+0xf/0x14 start_kernel+0x4c6/0x4eb secondary_startup_64_no_verify+0xe0/0xeb -> #1 (&p->pi_lock){-.-.}-{2:2}: _raw_spin_lock_irqsave+0x39/0x60 try_to_wake_up+0xab/0x1930 up+0x75/0xb0 __up_console_sem+0x6e/0x80 console_unlock+0x46a/0x590 do_con_write+0xc05/0x1d50 con_write+0x21/0x40 n_tty_write+0x4d4/0xfe0 file_tty_write.constprop.0+0x455/0x8a0 vfs_write+0x9c3/0xd90 ksys_write+0x127/0x250 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 ((console_sem).lock){....}-{2:2}: __lock_acquire+0x2a02/0x5e70 lock_acquire+0x1a2/0x530 _raw_spin_lock_irqsave+0x39/0x60 down_trylock+0xe/0x70 __down_trylock_console_sem+0x3b/0xd0 vprintk_emit+0x16b/0x560 vprintk+0x84/0xa0 _printk+0xba/0xf1 report_bug.cold+0x72/0xab handle_bug+0x3c/0x70 exc_invalid_op+0x14/0x50 asm_exc_invalid_op+0x16/0x20 group_sched_out.part.0+0x2c7/0x460 ctx_sched_out+0x8f1/0xc10 __perf_event_task_sched_out+0x6d0/0x18d0 __schedule+0xedd/0x2470 preempt_schedule_common+0x45/0xc0 __cond_resched+0x17/0x30 __mutex_lock+0xa3/0x14d0 __do_sys_perf_event_open+0x1eec/0x32c0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: (console_sem).lock --> &rq->__lock --> &ctx->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ctx->lock); lock(&rq->__lock); lock(&ctx->lock); lock((console_sem).lock); *** DEADLOCK *** 2 locks held by syz-executor.5/5730: #0: ffff88806cf37e98 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470 #1: ffff888008afcc20 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0 stack backtrace: CPU: 1 PID: 5730 Comm: syz-executor.5 Not tainted 6.0.0-rc7-next-20220930 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: dump_stack_lvl+0x8b/0xb3 check_noncircular+0x263/0x2e0 __lock_acquire+0x2a02/0x5e70 lock_acquire+0x1a2/0x530 _raw_spin_lock_irqsave+0x39/0x60 down_trylock+0xe/0x70 __down_trylock_console_sem+0x3b/0xd0 vprintk_emit+0x16b/0x560 vprintk+0x84/0xa0 _printk+0xba/0xf1 report_bug.cold+0x72/0xab handle_bug+0x3c/0x70 exc_invalid_op+0x14/0x50 asm_exc_invalid_op+0x16/0x20 RIP: 0010:group_sched_out.part.0+0x2c7/0x460 Code: 5e 41 5f e9 8b ae ef ff e8 86 ae ef ff 65 8b 1d 0b 18 ac 7e 31 ff 89 de e8 26 ab ef ff 85 db 0f 84 8a 00 00 00 e8 69 ae ef ff <0f> 0b e9 a5 fe ff ff e8 5d ae ef ff 48 8d 7d 10 48 b8 00 00 00 00 RSP: 0018:ffff88803f7c7978 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88803f7b8000 RSI: ffffffff81565dc7 RDI: 0000000000000005 RBP: ffff88803f7e0000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888008afcc00 R13: ffff88806cf3d2c0 R14: ffffffff8547c960 R15: 0000000000000002 ctx_sched_out+0x8f1/0xc10 __perf_event_task_sched_out+0x6d0/0x18d0 __schedule+0xedd/0x2470 preempt_schedule_common+0x45/0xc0 __cond_resched+0x17/0x30 __mutex_lock+0xa3/0x14d0 __do_sys_perf_event_open+0x1eec/0x32c0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f03f94d8b19 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f03f6a4e188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f03f95ebf60 RCX: 00007f03f94d8b19 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000280 RBP: 00007f03f9532f6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe6f19ec0f R14: 00007f03f6a4e300 R15: 0000000000022000 WARNING: CPU: 1 PID: 5730 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460 Modules linked in: CPU: 1 PID: 5730 Comm: syz-executor.5 Not tainted 6.0.0-rc7-next-20220930 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:group_sched_out.part.0+0x2c7/0x460 Code: 5e 41 5f e9 8b ae ef ff e8 86 ae ef ff 65 8b 1d 0b 18 ac 7e 31 ff 89 de e8 26 ab ef ff 85 db 0f 84 8a 00 00 00 e8 69 ae ef ff <0f> 0b e9 a5 fe ff ff e8 5d ae ef ff 48 8d 7d 10 48 b8 00 00 00 00 RSP: 0018:ffff88803f7c7978 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88803f7b8000 RSI: ffffffff81565dc7 RDI: 0000000000000005 RBP: ffff88803f7e0000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888008afcc00 R13: ffff88806cf3d2c0 R14: ffffffff8547c960 R15: 0000000000000002 FS: 00007f03f6a4e700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0ee4abafe8 CR3: 000000003e436000 CR4: 0000000000350ee0 Call Trace: ctx_sched_out+0x8f1/0xc10 __perf_event_task_sched_out+0x6d0/0x18d0 __schedule+0xedd/0x2470 preempt_schedule_common+0x45/0xc0 __cond_resched+0x17/0x30 __mutex_lock+0xa3/0x14d0 __do_sys_perf_event_open+0x1eec/0x32c0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f03f94d8b19 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f03f6a4e188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f03f95ebf60 RCX: 00007f03f94d8b19 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000280 RBP: 00007f03f9532f6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe6f19ec0f R14: 00007f03f6a4e300 R15: 0000000000022000 irq event stamp: 382 hardirqs last enabled at (381): [] asm_sysvec_apic_timer_interrupt+0x16/0x20 hardirqs last disabled at (382): [] __schedule+0x1225/0x2470 softirqs last enabled at (368): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (313): [] __irq_exit_rcu+0x11b/0x180 ---[ end trace 0000000000000000 ]--- loop3: detected capacity change from 0 to 3520 loop3: detected capacity change from 0 to 3520 loop6: detected capacity change from 0 to 128 FAT-fs (loop6): Unrecognized mount option " " or missing value cdrom: dropping to single frame dma loop6: detected capacity change from 0 to 128 FAT-fs (loop6): Unrecognized mount option " " or missing value hrtimer: interrupt took 18976 ns INFO: task rcu_gp:3 blocked for more than 143 seconds. Tainted: G W 6.0.0-rc7-next-20220930 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:rcu_gp state:I stack:30328 pid:3 ppid:2 flags:0x00004000 Call Trace: __schedule+0x893/0x2470 schedule+0xda/0x1b0 rescuer_thread+0x851/0xdb0 kthread+0x2ed/0x3a0 ret_from_fork+0x22/0x30 INFO: task rcu_par_gp:4 blocked for more than 143 seconds. Tainted: G W 6.0.0-rc7-next-20220930 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:rcu_par_gp state:I stack:30944 pid:4 ppid:2 flags:0x00004000 Call Trace: __schedule+0x893/0x2470 schedule+0xda/0x1b0 rescuer_thread+0x851/0xdb0 kthread+0x2ed/0x3a0 ret_from_fork+0x22/0x30 INFO: task slub_flushwq:5 blocked for more than 143 seconds. Tainted: G W 6.0.0-rc7-next-20220930 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:slub_flushwq state:I stack:30944 pid:5 ppid:2 flags:0x00004000 Call Trace: __schedule+0x893/0x2470 schedule+0xda/0x1b0 rescuer_thread+0x851/0xdb0 kthread+0x2ed/0x3a0 ret_from_fork+0x22/0x30 INFO: task netns:6 blocked for more than 143 seconds. Tainted: G W 6.0.0-rc7-next-20220930 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:netns state:I stack:30944 pid:6 ppid:2 flags:0x00004000 Call Trace: __schedule+0x893/0x2470 schedule+0xda/0x1b0 rescuer_thread+0x851/0xdb0 kthread+0x2ed/0x3a0 ret_from_fork+0x22/0x30 INFO: task kworker/0:0H:8 blocked for more than 143 seconds. Tainted: G W 6.0.0-rc7-next-20220930 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:0H state:I stack:28952 pid:8 ppid:2 flags:0x00004000 Workqueue: 0x0 (kblockd) Call Trace: __schedule+0x893/0x2470 schedule+0xda/0x1b0 worker_thread+0x15f/0x1260 kthread+0x2ed/0x3a0 ret_from_fork+0x22/0x30 INFO: task mm_percpu_wq:10 blocked for more than 143 seconds. Tainted: G W 6.0.0-rc7-next-20220930 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:mm_percpu_wq state:I stack:30944 pid:10 ppid:2 flags:0x00004000 Call Trace: __schedule+0x893/0x2470 schedule+0xda/0x1b0 rescuer_thread+0x851/0xdb0 kthread+0x2ed/0x3a0 ret_from_fork+0x22/0x30 INFO: task rcu_tasks_kthre:11 blocked for more than 143 seconds. Tainted: G W 6.0.0-rc7-next-20220930 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:rcu_tasks_kthre state:I stack:29272 pid:11 ppid:2 flags:0x00004000 Call Trace: __schedule+0x893/0x2470 schedule+0xda/0x1b0 rcu_tasks_one_gp+0x3db/0xc10 rcu_tasks_kthread+0x80/0xa0 kthread+0x2ed/0x3a0 ret_from_fork+0x22/0x30 INFO: task kworker/1:0H:21 blocked for more than 143 seconds. Tainted: G W 6.0.0-rc7-next-20220930 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0H state:I stack:29760 pid:21 ppid:2 flags:0x00004000 Workqueue: 0x0 (events_highpri) Call Trace: __schedule+0x893/0x2470 schedule+0xda/0x1b0 worker_thread+0x15f/0x1260 kthread+0x2ed/0x3a0 ret_from_fork+0x22/0x30 INFO: task inet_frag_wq:23 blocked for more than 143 seconds. Tainted: G W 6.0.0-rc7-next-20220930 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:inet_frag_wq state:I stack:30704 pid:23 ppid:2 flags:0x00004000 Call Trace: __schedule+0x893/0x2470 schedule+0xda/0x1b0 rescuer_thread+0x851/0xdb0 kthread+0x2ed/0x3a0 ret_from_fork+0x22/0x30 INFO: task writeback:28 blocked for more than 143 seconds. Tainted: G W 6.0.0-rc7-next-20220930 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:writeback state:I stack:30176 pid:28 ppid:2 flags:0x00004000 Call Trace: __schedule+0x893/0x2470 schedule+0xda/0x1b0 rescuer_thread+0x851/0xdb0 kthread+0x2ed/0x3a0 ret_from_fork+0x22/0x30 INFO: lockdep is turned off.