 </TASK>
FAT-fs (loop4): invalid media value (0x08)
FAT-fs (loop4): Can't find a valid FAT filesystem
Call Trace:
======================================================
WARNING: possible circular locking dependency detected
5.16.0-rc6-next-20211224 #1 Not tainted
------------------------------------------------------
syz-executor.6/10575 is trying to acquire lock:
ffffffff851f5118 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0xe/0x60 kernel/locking/semaphore.c:138

but task is already holding lock:
ffff88800e72d020 (&ctx->lock){....}-{2:2}, at: __perf_install_in_context+0x12d/0x310 kernel/events/core.c:2784

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&ctx->lock){....}-{2:2}:
       __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/0x2190 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

-> #2 (&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+0x5353/0x6e20 kernel/fork.c:2394
       kernel_clone+0xe7/0xa60 kernel/fork.c:2620
       kernel_thread+0xae/0xf0 kernel/fork.c:2672
       rest_init+0x24/0x3d0 init/main.c:692
       start_kernel+0x484/0x4a5 init/main.c:1141
       secondary_startup_64_no_verify+0xd5/0xdb

-> #1 (&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
       vprintk_emit+0x198/0x450 kernel/printk/printk.c:2248
       vprintk+0x80/0x90 kernel/printk/printk_safe.c:50
       _printk+0xba/0xed kernel/printk/printk.c:2269
       regdb_fw_cb.cold+0x6c/0xa7 net/wireless/reg.c:1044
       request_firmware_work_func+0x12e/0x230 drivers/base/firmware_loader/main.c:1022
       process_one_work+0xa2a/0x16d0 kernel/workqueue.c:2307
       worker_thread+0x628/0x1310 kernel/workqueue.c:2454
       kthread+0x2f0/0x3a0 kernel/kthread.c:377
       ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:295

-> #0 ((console_sem).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_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
       __wrmsr arch/x86/include/asm/msr.h:103 [inline]
       native_write_msr arch/x86/include/asm/msr.h:154 [inline]
       wrmsrl arch/x86/include/asm/msr.h:271 [inline]
       __x86_pmu_enable_event arch/x86/events/perf_event.h:1122 [inline]
       x86_pmu_enable_all+0x132/0x3c0 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

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 ***

4 locks held by syz-executor.6/10575:
 #0: ffff88801b41d020 (&sig->exec_update_lock){++++}-{3:3}, at: __do_sys_perf_event_open+0x1023/0x3040 kernel/events/core.c:12273
 #1: ffff88800e72d0b0 (&ctx->mutex){+.+.}-{3:3}, at: __do_sys_perf_event_open+0x17cd/0x3040 kernel/events/core.c:12327
 #2: ffff88806ce3ee20 (&cpuctx_lock){-...}-{2:2}, at: __perf_install_in_context+0xf4/0x310 kernel/events/core.c:2782
 #3: ffff88800e72d020 (&ctx->lock){....}-{2:2}, at: __perf_install_in_context+0x12d/0x310 kernel/events/core.c:2784

stack backtrace:
CPU: 0 PID: 10575 Comm: syz-executor.6 Not tainted 5.16.0-rc6-next-20211224 #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_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
RIP: 0010:__wrmsr arch/x86/include/asm/msr.h:103 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:154 [inline]
RIP: 0010:wrmsrl arch/x86/include/asm/msr.h:271 [inline]
RIP: 0010:__x86_pmu_enable_event arch/x86/events/perf_event.h:1122 [inline]
RIP: 0010:x86_pmu_enable_all+0x132/0x3c0 arch/x86/events/core.c:743
Code: f7 d7 49 21 c7 48 89 f8 48 c1 e8 03 42 80 3c 20 00 0f 85 64 02 00 00 48 8b 9b 78 01 00 00 4c 89 fa 44 89 f8 48 c1 ea 20 89 d9 <0f> 30 0f 1f 44 00 00 e8 52 40 42 00 e8 4d 40 42 00 8b 1d 43 f4 8a
RSP: 0018:ffff88800b5a7968 EFLAGS: 00010016
RAX: 0000000000530076 RBX: 00000000c0010200 RCX: 00000000c0010200
RDX: 0000000000000100 RSI: ffffffff8100de36 RDI: ffff8880081bbaf8
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff8100de25 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88806ce21c20 R14: ffff88806ce21e20 R15: 0000010000530076
 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
RIP: 0033:0x7f3d2ffbab19
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:00007f3d2d530188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f3d300cdf60 RCX: 00007f3d2ffbab19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200002c0
RBP: 00007f3d30014f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe512b861f R14: 00007f3d2d530300 R15: 0000000000022000
 </TASK>
 <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]
 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
RIP: 0033:0x7f3d2ffbab19
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:00007f3d2d530188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f3d300cdf60 RCX: 00007f3d2ffbab19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200002c0
RBP: 00007f3d30014f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe512b861f R14: 00007f3d2d530300 R15: 0000000000022000
 </TASK>
Call Trace:
 <IRQ>
 x86_pmu_stop+0x149/0x330 arch/x86/events/core.c:1597
 x86_pmu_del+0x1be/0x610 arch/x86/events/core.c:1636
 event_sched_out+0x2ed/0xaf0 kernel/events/core.c:2289
 __perf_remove_from_context+0x88/0x830 kernel/events/core.c:2356
 event_function+0x297/0x3d0 kernel/events/core.c:253
 remote_function kernel/events/core.c:91 [inline]
 remote_function+0x125/0x1b0 kernel/events/core.c:71
 flush_smp_call_function_queue+0x1df/0x610 kernel/smp.c:628
 __sysvec_call_function_single+0x92/0x3a0 arch/x86/kernel/smp.c:248
 sysvec_call_function_single+0x89/0xc0 arch/x86/kernel/smp.c:243
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:646
RIP: 0010:arch_local_irq_enable arch/x86/include/asm/irqflags.h:81 [inline]
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:138 [inline]
RIP: 0010:generic_exec_single+0x20c/0x300 kernel/smp.c:520
Code: 31 e4 4c 89 ef 0f ae e8 ff d5 e9 ec fe ff ff e8 7a bb 0a 00 e8 95 82 11 00 4c 89 ef 0f ae e8 ff d5 e8 98 85 11 00 fb 45 31 e4 <e9> cc fe ff ff e8 5a bb 0a 00 0f 0b e9 73 ff ff ff 4c 89 f7 e8 3b
RSP: 0018:ffff88800b5a7b08 EFLAGS: 00000246
RAX: 0000000000000007 RBX: 0000000000000200 RCX: 1ffffffff0b18091
RDX: 0000000000000000 RSI: ffffffff8149e971 RDI: ffffffff81386388
RBP: ffffffff81513650 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8149e958 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88800b5a7c38 R14: ffff88800b5a7b88 R15: 0000000000000200
 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
RIP: 0033:0x7f3d2ffbab19
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:00007f3d2d530188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f3d300cdf60 RCX: 00007f3d2ffbab19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200002c0
RBP: 00007f3d30014f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe512b861f R14: 00007f3d2d530300 R15: 0000000000022000
 </TASK>
loop5: detected capacity change from 0 to 3520
Call Trace:
 <IRQ>
 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
 flush_smp_call_function_queue+0x1df/0x610 kernel/smp.c:628
 __sysvec_call_function_single+0x92/0x3a0 arch/x86/kernel/smp.c:248
 sysvec_call_function_single+0x89/0xc0 arch/x86/kernel/smp.c:243
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:646
RIP: 0010:console_unlock+0xa7f/0xae0 kernel/printk/printk.c:2719
Code: f7 ff ff 4c 89 ef e8 30 4d 49 00 e9 bd f9 ff ff 4c 89 ef e8 23 4d 49 00 e9 3b fa ff ff e8 19 26 18 00 e8 44 f0 1e 00 fb 31 f6 <31> ff e8 1a 28 18 00 e9 cc fe ff ff 4c 89 04 24 e8 dc 4c 49 00 4c
RSP: 0018:ffff888027e1f718 EFLAGS: 00000246
RAX: 0000000000000007 RBX: dffffc0000000000 RCX: 1ffffffff0b18091
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff812af8dc
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8149e958 R11: 0000000000000001 R12: ffff888027e1f770
R13: ffffffff855d7bb0 R14: ffffffff82bdad80 R15: 0000000000000200
 vprintk_emit+0x198/0x450 kernel/printk/printk.c:2248
 vprintk+0x80/0x90 kernel/printk/printk_safe.c:50
 _printk+0xba/0xed kernel/printk/printk.c:2269
 set_capacity_and_notify.cold+0x1c/0x92 block/genhd.c:89
 loop_set_size drivers/block/loop.c:231 [inline]
 loop_configure+0x1015/0x1950 drivers/block/loop.c:1054
 lo_ioctl+0x7c5/0x18b0 drivers/block/loop.c:1545
 blkdev_ioctl+0x362/0x7f0 block/ioctl.c:588
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __x64_sys_ioctl+0x196/0x210 fs/ioctl.c:860
 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: 0033:0x7f9ed436b8d7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 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:00007f9ed18e0f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9ed43b5970 RCX: 00007f9ed436b8d7
RDX: 0000000000000003 RSI: 0000000000004c00 RDI: 0000000000000004
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000003 R14: 00000000200004d0 R15: 000000000000001e
 </TASK>
Call Trace:
 <IRQ>
 x86_pmu_stop+0x149/0x330 arch/x86/events/core.c:1597
 x86_pmu_del+0x1be/0x610 arch/x86/events/core.c:1636
 event_sched_out+0x2ed/0xaf0 kernel/events/core.c:2289
 __perf_remove_from_context+0x88/0x830 kernel/events/core.c:2356
 event_function+0x297/0x3d0 kernel/events/core.c:253
 remote_function kernel/events/core.c:91 [inline]
 remote_function+0x125/0x1b0 kernel/events/core.c:71
 flush_smp_call_function_queue+0x1df/0x610 kernel/smp.c:628
 __sysvec_call_function_single+0x92/0x3a0 arch/x86/kernel/smp.c:248
 sysvec_call_function_single+0x89/0xc0 arch/x86/kernel/smp.c:243
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:646
RIP: 0010:console_unlock+0xa7f/0xae0 kernel/printk/printk.c:2719
Code: f7 ff ff 4c 89 ef e8 30 4d 49 00 e9 bd f9 ff ff 4c 89 ef e8 23 4d 49 00 e9 3b fa ff ff e8 19 26 18 00 e8 44 f0 1e 00 fb 31 f6 <31> ff e8 1a 28 18 00 e9 cc fe ff ff 4c 89 04 24 e8 dc 4c 49 00 4c
RSP: 0018:ffff888027e1f718 EFLAGS: 00000246
RAX: 0000000000000007 RBX: dffffc0000000000 RCX: 1ffffffff0b18091
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff812af8dc
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8149e958 R11: 0000000000000001 R12: ffff888027e1f770
R13: ffffffff855d7bb0 R14: ffffffff82bdad80 R15: 0000000000000200
 vprintk_emit+0x198/0x450 kernel/printk/printk.c:2248
 vprintk+0x80/0x90 kernel/printk/printk_safe.c:50
 _printk+0xba/0xed kernel/printk/printk.c:2269
 set_capacity_and_notify.cold+0x1c/0x92 block/genhd.c:89
 loop_set_size drivers/block/loop.c:231 [inline]
 loop_configure+0x1015/0x1950 drivers/block/loop.c:1054
 lo_ioctl+0x7c5/0x18b0 drivers/block/loop.c:1545
 blkdev_ioctl+0x362/0x7f0 block/ioctl.c:588
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __x64_sys_ioctl+0x196/0x210 fs/ioctl.c:860
 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: 0033:0x7f9ed436b8d7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 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:00007f9ed18e0f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9ed43b5970 RCX: 00007f9ed436b8d7
RDX: 0000000000000003 RSI: 0000000000004c00 RDI: 0000000000000004
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000003 R14: 00000000200004d0 R15: 000000000000001e
 </TASK>
loop2: detected capacity change from 0 to 512
EXT4-fs: Test dummy encryption mount option ignored
EXT4-fs: Mount option "nouser_xattr" will be removed by 3.5
Contact linux-ext4@vger.kernel.org if you think we should keep it.

EXT4-fs (loop2): encrypted files will use data=ordered instead of data journaling mode
I/O error, dev loop4, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
[EXT4 FS bs=2048, gc=1, bpg=16384, ipg=32, mo=a006a028, mo2=0002]
System zones: 0-7
EXT4-fs (loop2): mounted filesystem without journal. Quota mode: writeback.
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 0 op 0x1:(WRITE) flags 0x100000 phys_seg 1 prio class 0
Buffer I/O error on dev sr0, logical block 0, lost async page write
----------------
Code disassembly (best guess):
   0:	f7 d7                	not    %edi
   2:	49 21 c7             	and    %rax,%r15
   5:	48 89 f8             	mov    %rdi,%rax
   8:	48 c1 e8 03          	shr    $0x3,%rax
   c:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  11:	0f 85 64 02 00 00    	jne    0x27b
  17:	48 8b 9b 78 01 00 00 	mov    0x178(%rbx),%rbx
  1e:	4c 89 fa             	mov    %r15,%rdx
  21:	44 89 f8             	mov    %r15d,%eax
  24:	48 c1 ea 20          	shr    $0x20,%rdx
  28:	89 d9                	mov    %ebx,%ecx
* 2a:	0f 30                	wrmsr <-- trapping instruction
  2c:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  31:	e8 52 40 42 00       	callq  0x424088
  36:	e8 4d 40 42 00       	callq  0x424088
  3b:	8b                   	.byte 0x8b
  3c:	1d                   	.byte 0x1d
  3d:	43 f4                	rex.XB hlt
  3f:	8a                   	.byte 0x8a