ISOFS: Unable to identify CD-ROM format.
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=15e/1/0x4000000000000004 softirq=195868/195870 fqs=4984 
rcu: 	 (t=10500 jiffies g=312957 q=2055)
NMI backtrace for cpu 1
CPU: 1 PID: 23765 Comm: syz-executor.0 Not tainted 4.19.139-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2fe lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x15f/0x19c kernel/rcu/tree.c:1340
 print_cpu_stall kernel/rcu/tree.c:1478 [inline]
 check_cpu_stall kernel/rcu/tree.c:1550 [inline]
 __rcu_pending kernel/rcu/tree.c:3293 [inline]
 rcu_pending kernel/rcu/tree.c:3336 [inline]
 rcu_check_callbacks.cold+0x62d/0xe19 kernel/rcu/tree.c:2682
 update_process_times+0x2a/0xb0 kernel/time/timer.c:1650
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168
 tick_sched_timer+0xfc/0x290 kernel/time/tick-sched.c:1278
 __run_hrtimer kernel/time/hrtimer.c:1401 [inline]
 __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1463
 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1521
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline]
 smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
RIP: 0010:est_timer+0x391/0x4f0 net/core/gen_estimator.c:81
Code: 4d 29 e5 4c 89 ee e8 de 38 b4 fb 4d 85 ed 79 4b e8 44 37 b4 fb 4c 89 e6 48 89 ef e8 79 5f a5 fb 48 b8 00 00 00 00 00 fc ff df <48> c7 04 03 00 00 00 00 48 8b 84 24 90 00 00 00 65 48 2b 04 25 28
RSP: 0018:ffff8880ae707c48 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 1ffff11015ce0f90 RCX: 1ffff11015ce0f76
RDX: 0000000000000100 RSI: ffffffff815adcef RDI: 0000000000000001
RBP: ffff8880436e6bf8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00000001000239f9
R13: 000000000000009d R14: 0000000000000000 R15: 0000000000000000
 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338
 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375
 __run_timers kernel/time/timer.c:1703 [inline]
 run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1716
 __do_softirq+0x26c/0x9a0 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x215/0x260 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:544 [inline]
 smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
 </IRQ>
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:41 [inline]
RIP: 0010:unwind_next_frame+0x102c/0x1c60 arch/x86/kernel/unwind_orc.c:579
Code: 0f 8e 7a 08 00 00 41 39 2f 0f 85 8e 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 80 3c 02 00 0f 85 d4 05 00 00 <49> 8d 7f 08 49 8b 6f 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48
RSP: 0018:ffff88801d74f588 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 1ffff11003ae9eb9 RCX: ffffffff8a801eb2
RDX: 1ffff11003ae9ed5 RSI: ffff88801d74ff58 RDI: ffff88801d74f6b0
RBP: 0000000000000001 R08: ffffffff8a801eb6 R09: ffffffff8a801eb7
R10: 0000000000066061 R11: 0000000000000001 R12: 000000000118bf58
R13: ffff88801d74ff58 R14: ffff88801d74f6a8 R15: ffff88801d74f670
 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44
 save_stack mm/kasan/kasan.c:448 [inline]
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553
 __do_kmalloc mm/slab.c:3727 [inline]
 __kmalloc+0x15a/0x3c0 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 kzalloc include/linux/slab.h:709 [inline]
 __seq_open_private+0x1f/0xd0 fs/seq_file.c:619
 seq_open_private+0x21/0x40 fs/seq_file.c:641
 mounts_open_common+0x21e/0x520 fs/proc_namespace.c:271
 do_dentry_open+0x4aa/0x1160 fs/open.c:796
 do_last fs/namei.c:3421 [inline]
 path_openat+0x793/0x2df0 fs/namei.c:3537
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x416b81
Code: 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 19 00 00 c3 48 83 ec 08 e8 0a fa ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fa ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007f11a1faabb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f11a1faabd0 RCX: 0000000000416b81
RDX: 00007f11a1faabe4 RSI: 0000000000000002 RDI: 00007f11a1faabd0
RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000014
R10: 0000000000000009 R11: 0000000000000293 R12: 000000000118bf2c
R13: 00007ffdfe89e61f R14: 00007f11a1fab9c0 R15: 000000000118bf2c
rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu: 	1-....: (10804 ticks this GP) idle=15e/1/0x4000000000000004 softirq=195869/195870 fqs=4951 
rcu: 	(detected by 0, t=10503 jiffies, g=8913, q=13)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 23765 Comm: syz-executor.0 Not tainted 4.19.139-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lockdep_hardirqs_on+0x14a/0x5c0 kernel/locking/lockdep.c:2872
Code: e8 03 80 3c 10 00 0f 85 48 04 00 00 48 83 3d 7c c5 80 07 00 0f 84 60 03 00 00 9c 58 0f 1f 44 00 00 f6 c4 02 0f 85 b5 03 00 00 <48> b8 00 00 00 00 00 fc ff df 48 89 da 83 e3 07 48 c1 ea 03 83 c3
RSP: 0018:ffff8880ae707cb8 EFLAGS: 00000046
RAX: 0000000000000086 RBX: ffffffff8b915aa0 RCX: 1ffffffff1238d04
RDX: dffffc0000000000 RSI: ffffffff816ee3fa RDI: ffff88801070ea90
RBP: ffffffff81005ec3 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f11a1fab700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2be21000 CR3: 000000001ccc3000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 trace_hardirqs_on_thunk+0x1a/0x1c
 retint_kernel+0x2d/0x2d
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:192
Code: c0 58 5b d2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d c1 f8 94 01 00 74 25 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 66 3d 0a fa 65 8b 05 1f 8b c4 78 85 c0 74 02 5d
RSP: 0018:ffff8880ae707dd0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11a4b6b RBX: dffffc0000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff88801070eac4
RBP: ffff8880ae723a40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85b57500
R13: ffff8880ae723a40 R14: ffff8880ae707e68 R15: 0000000000000000
 expire_timers+0x238/0x4e0 kernel/time/timer.c:1374
 __run_timers kernel/time/timer.c:1703 [inline]
 run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1716
 __do_softirq+0x26c/0x9a0 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x215/0x260 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:544 [inline]
 smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
 </IRQ>
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:41 [inline]
RIP: 0010:unwind_next_frame+0x102c/0x1c60 arch/x86/kernel/unwind_orc.c:579
Code: 0f 8e 7a 08 00 00 41 39 2f 0f 85 8e 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 80 3c 02 00 0f 85 d4 05 00 00 <49> 8d 7f 08 49 8b 6f 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48
RSP: 0018:ffff88801d74f588 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 1ffff11003ae9eb9 RCX: ffffffff8a801eb2
RDX: 1ffff11003ae9ed5 RSI: ffff88801d74ff58 RDI: ffff88801d74f6b0
RBP: 0000000000000001 R08: ffffffff8a801eb6 R09: ffffffff8a801eb7
R10: 0000000000066061 R11: 0000000000000001 R12: 000000000118bf58
R13: ffff88801d74ff58 R14: ffff88801d74f6a8 R15: ffff88801d74f670
 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44
 save_stack mm/kasan/kasan.c:448 [inline]
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553
 __do_kmalloc mm/slab.c:3727 [inline]
 __kmalloc+0x15a/0x3c0 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 kzalloc include/linux/slab.h:709 [inline]
 __seq_open_private+0x1f/0xd0 fs/seq_file.c:619
 seq_open_private+0x21/0x40 fs/seq_file.c:641
 mounts_open_common+0x21e/0x520 fs/proc_namespace.c:271
 do_dentry_open+0x4aa/0x1160 fs/open.c:796
 do_last fs/namei.c:3421 [inline]
 path_openat+0x793/0x2df0 fs/namei.c:3537
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x416b81
Code: 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 19 00 00 c3 48 83 ec 08 e8 0a fa ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fa ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007f11a1faabb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f11a1faabd0 RCX: 0000000000416b81
RDX: 00007f11a1faabe4 RSI: 0000000000000002 RDI: 00007f11a1faabd0
RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000014
R10: 0000000000000009 R11: 0000000000000293 R12: 000000000118bf2c
R13: 00007ffdfe89e61f R14: 00007f11a1fab9c0 R15: 000000000118bf2c