R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
======================================================
WARNING: possible circular locking dependency detected
5.16.0-rc5-next-20211220 #1 Not tainted
------------------------------------------------------
syz-executor.0/4464 is trying to acquire lock:
ffff88801dec3020 (&ctx->lock){....}-{2:2}, at: perf_event_context_sched_out kernel/events/core.c:3493 [inline]
ffff88801dec3020 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x519/0x1920 kernel/events/core.c:3601

but task is already holding lock:
ffff88806ce37a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:489 [inline]
ffff88806ce37a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1318 [inline]
ffff88806ce37a58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1616 [inline]
ffff88806ce37a58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2160 kernel/sched/core.c:6210

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&rq->__lock){-.-.}-{2:2}:
       _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:378
       raw_spin_rq_lock_nested+0x1e/0x30 kernel/sched/core.c:489
       raw_spin_rq_lock kernel/sched/sched.h:1318 [inline]
       rq_lock kernel/sched/sched.h:1616 [inline]
       task_fork_fair+0x63/0x4d0 kernel/sched/fair.c:11146
       sched_post_fork+0x343/0x490 kernel/sched/core.c:4462
       copy_process+0x548e/0x6d40 kernel/fork.c:2396
       kernel_clone+0xe7/0xa60 kernel/fork.c:2622
       kernel_thread+0xae/0xf0 kernel/fork.c:2674
       rest_init+0x24/0x3d0 init/main.c:692
       start_kernel+0x484/0x4a5 init/main.c:1141
       secondary_startup_64_no_verify+0xd5/0xdb

-> #2 (&p->pi_lock){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
       try_to_wake_up+0xac/0x14c0 kernel/sched/core.c:4017
       up+0x75/0xb0 kernel/locking/semaphore.c:190
       __up_console_sem+0x6e/0x80 kernel/printk/printk.c:255
       console_unlock+0x53e/0xae0 kernel/printk/printk.c:2730
       con_install+0x14e/0x5c0 drivers/tty/vt/vt.c:3411
       tty_driver_install_tty drivers/tty/tty_io.c:1310 [inline]
       tty_init_dev.part.0+0xa0/0x610 drivers/tty/tty_io.c:1422
       tty_init_dev include/linux/err.h:36 [inline]
       tty_open_by_driver drivers/tty/tty_io.c:2089 [inline]
       tty_open+0xbc8/0x1380 drivers/tty/tty_io.c:2136
       chrdev_open+0x268/0x6d0 fs/char_dev.c:414
       do_dentry_open+0x4c6/0x1110 fs/open.c:824
       do_open fs/namei.c:3476 [inline]
       path_openat+0x1a3e/0x28a0 fs/namei.c:3609
       do_filp_open+0x1aa/0x400 fs/namei.c:3636
       do_sys_openat2+0x16d/0x4d0 fs/open.c:1214
       do_sys_open fs/open.c:1230 [inline]
       __do_sys_openat fs/open.c:1246 [inline]
       __se_sys_openat fs/open.c:1241 [inline]
       __x64_sys_openat+0x13f/0x1f0 fs/open.c:1241
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x44/0xae

-> #1 ((console_sem).lock){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
       down_trylock+0xe/0x60 kernel/locking/semaphore.c:138
       __down_trylock_console_sem+0x3b/0xd0 kernel/printk/printk.c:238
       console_trylock kernel/printk/printk.c:2545 [inline]
       console_trylock_spinning kernel/printk/printk.c:1846 [inline]
       vprintk_emit+0x146/0x450 kernel/printk/printk.c:2247
       vprintk+0x80/0x90 kernel/printk/printk_safe.c:50
       _printk+0xba/0xed kernel/printk/printk.c:2269
       show_trace_log_lvl+0x57/0x2bb arch/x86/kernel/dumpstack.c:195
       ex_handler_msr+0x311/0x3a0 arch/x86/mm/extable.c:101
       fixup_exception+0x1ca/0xdd0 arch/x86/mm/extable.c:212
       __exc_general_protection arch/x86/kernel/traps.c:601 [inline]
       exc_general_protection+0xed/0x2f0 arch/x86/kernel/traps.c:562
       asm_exc_general_protection+0x1e/0x30 arch/x86/include/asm/idtentry.h:562
       wrmsrl arch/x86/include/asm/msr.h:271 [inline]
       __x86_pmu_enable_event arch/x86/events/perf_event.h:1120 [inline]
       x86_pmu_enable_all+0x2f7/0x3c0 arch/x86/events/core.c:743
       x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
       perf_pmu_enable kernel/events/core.c:1207 [inline]
       perf_pmu_enable kernel/events/core.c:1203 [inline]
       ctx_resched+0x2b0/0x390 kernel/events/core.c:2754
       __perf_install_in_context+0x285/0x310 kernel/events/core.c:2821
       remote_function kernel/events/core.c:91 [inline]
       remote_function+0x125/0x1b0 kernel/events/core.c:71
       generic_exec_single+0x203/0x300 kernel/smp.c:518
       smp_call_function_single+0x189/0x460 kernel/smp.c:755
       task_function_call+0xe5/0x170 kernel/events/core.c:119
       perf_install_in_context+0x2cb/0x550 kernel/events/core.c:2922
       __do_sys_perf_event_open+0x1bf0/0x3040 kernel/events/core.c:12433
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x44/0xae

-> #0 (&ctx->lock){....}-{2:2}:
       check_prev_add kernel/locking/lockdep.c:3063 [inline]
       check_prevs_add kernel/locking/lockdep.c:3186 [inline]
       validate_chain kernel/locking/lockdep.c:3801 [inline]
       __lock_acquire+0x2a14/0x5b70 kernel/locking/lockdep.c:5027
       lock_acquire kernel/locking/lockdep.c:5639 [inline]
       lock_acquire+0x1a2/0x4d0 kernel/locking/lockdep.c:5604
       __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
       _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
       perf_event_context_sched_out kernel/events/core.c:3493 [inline]
       __perf_event_task_sched_out+0x519/0x1920 kernel/events/core.c:3601
       perf_event_task_sched_out include/linux/perf_event.h:1245 [inline]
       prepare_task_switch kernel/sched/core.c:4796 [inline]
       context_switch kernel/sched/core.c:4938 [inline]
       __schedule+0xead/0x2160 kernel/sched/core.c:6296
       preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
       __cond_resched+0x13/0x20 kernel/sched/core.c:8175
       might_resched include/linux/kernel.h:110 [inline]
       __mutex_lock_common kernel/locking/mutex.c:577 [inline]
       __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
       __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x44/0xae

other info that might help us debug this:

Chain exists of:
  &ctx->lock --> &p->pi_lock --> &rq->__lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&rq->__lock);
                               lock(&p->pi_lock);
                               lock(&rq->__lock);
  lock(&ctx->lock);

 *** DEADLOCK ***

1 lock held by syz-executor.0/4464:
 #0: ffff88806ce37a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:489 [inline]
 #0: ffff88806ce37a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1318 [inline]
 #0: ffff88806ce37a58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1616 [inline]
 #0: ffff88806ce37a58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2160 kernel/sched/core.c:6210

stack backtrace:
CPU: 0 PID: 4464 Comm: syz-executor.0 Not tainted 5.16.0-rc5-next-20211220 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x8b/0xb3 lib/dump_stack.c:106
 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2143
 check_prev_add kernel/locking/lockdep.c:3063 [inline]
 check_prevs_add kernel/locking/lockdep.c:3186 [inline]
 validate_chain kernel/locking/lockdep.c:3801 [inline]
 __lock_acquire+0x2a14/0x5b70 kernel/locking/lockdep.c:5027
 lock_acquire kernel/locking/lockdep.c:5639 [inline]
 lock_acquire+0x1a2/0x4d0 kernel/locking/lockdep.c:5604
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
 perf_event_context_sched_out kernel/events/core.c:3493 [inline]
 __perf_event_task_sched_out+0x519/0x1920 kernel/events/core.c:3601
 perf_event_task_sched_out include/linux/perf_event.h:1245 [inline]
 prepare_task_switch kernel/sched/core.c:4796 [inline]
 context_switch kernel/sched/core.c:4938 [inline]
 __schedule+0xead/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
loop7: detected capacity change from 0 to 4
ext4: Unknown parameter 'resu]id0x0000000000000000'
9pnet: Could not find request transport: fd
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
loop1: detected capacity change from 0 to 8
FAT-fs (loop1): Unrecognized mount option "t." or missing value
loop7: detected capacity change from 0 to 272
loop3: detected capacity change from 0 to 40
loop1: detected capacity change from 0 to 8
FAT-fs (loop1): Unrecognized mount option "t." or missing value
FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
loop5: detected capacity change from 0 to 40
FAT-fs (loop7): error, corrupted directory (invalid entries)
FAT-fs (loop7): Filesystem has been set read-only
FAT-fs (loop7): error, corrupted directory (invalid entries)
9pnet_virtio: no channels available for device syz
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
FAT-fs (loop7): error, corrupted directory (invalid entries)
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
FAT-fs (loop7): error, corrupted directory (invalid entries)
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
9pnet_virtio: no channels available for device syz
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
loop1: detected capacity change from 0 to 8
loop4: detected capacity change from 0 to 264192
loop7: detected capacity change from 0 to 272
FAT-fs (loop1): Unrecognized mount option "t." or missing value
loop3: detected capacity change from 0 to 40
FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
loop5: detected capacity change from 0 to 40
FAT-fs (loop7): error, corrupted directory (invalid entries)
FAT-fs (loop7): Filesystem has been set read-only
9pnet: Could not find request transport: fd
loop6: detected capacity change from 0 to 272
FAT-fs (loop7): error, corrupted directory (invalid entries)
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
9pnet: Could not find request transport: fd
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
9pnet_virtio: no channels available for device syz
FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
FAT-fs (loop6): error, corrupted directory (invalid entries)
FAT-fs (loop6): Filesystem has been set read-only
loop1: detected capacity change from 0 to 8
loop4: detected capacity change from 0 to 264192
FAT-fs (loop1): Unrecognized mount option "t." or missing value
FAT-fs (loop6): error, corrupted directory (invalid entries)
9pnet_virtio: no channels available for device syz
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
loop2: detected capacity change from 0 to 40
loop5: detected capacity change from 0 to 40
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
audit: type=1400 audit(1640096120.007:10): avc:  denied  { write } for  pid=4463 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
Call Trace:
 <TASK>
 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350
 perf_pmu_enable kernel/events/core.c:1207 [inline]
 perf_pmu_enable kernel/events/core.c:1203 [inline]
 perf_event_context_sched_in kernel/events/core.c:3893 [inline]
 __perf_event_task_sched_in+0x5e4/0x770 kernel/events/core.c:3931
 perf_event_task_sched_in include/linux/perf_event.h:1222 [inline]
 finish_task_switch.isra.0+0x45c/0x870 kernel/sched/core.c:4861
 context_switch kernel/sched/core.c:4989 [inline]
 __schedule+0x88a/0x2160 kernel/sched/core.c:6296
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462
 __cond_resched+0x13/0x20 kernel/sched/core.c:8175
 might_resched include/linux/kernel.h:110 [inline]
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733
 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f857d448b19
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:00007f857a9be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f857d55bf60 RCX: 00007f857d448b19
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000180
RBP: 00007f857d4a2f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed3eb1abf R14: 00007f857a9be300 R15: 0000000000022000
 </TASK>
loop4: detected capacity change from 0 to 264192
loop1: detected capacity change from 0 to 8
FAT-fs (loop1): Unrecognized mount option "t." or missing value
loop3: detected capacity change from 0 to 40
loop6: detected capacity change from 0 to 272
loop5: detected capacity change from 0 to 40
loop7: detected capacity change from 0 to 272
FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
FAT-fs (loop6): error, corrupted directory (invalid entries)
FAT-fs (loop6): Filesystem has been set read-only
loop2: detected capacity change from 0 to 40
FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
FAT-fs (loop6): error, corrupted directory (invalid entries)
9pnet_virtio: no channels available for device syz
FAT-fs (loop7): error, corrupted directory (invalid entries)
FAT-fs (loop7): Filesystem has been set read-only
FAT-fs (loop7): error, corrupted directory (invalid entries)
9pnet_virtio: no channels available for device syz