rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=8a3/1/0x4000000000000000 softirq=143494/143494 fqs=1 
	(t=10500 jiffies g=231305 q=287)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10491 jiffies! g231305 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=86883
rcu: rcu_preempt kthread starved for 10492 jiffies! g231305 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:28640 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0xab2/0x4d90 kernel/sched/core.c:6296
 schedule+0xd2/0x260 kernel/sched/core.c:6369
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
 rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1966
 rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2139
 kthread+0x405/0x4f0 kernel/kthread.c:345
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 18225 Comm: syz-executor.3 Not tainted 5.16.0-rc4-next-20211210-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:filter_irq_stacks+0x26/0x90 kernel/stacktrace.c:398
Code: 00 00 00 00 41 54 41 89 f4 55 53 48 83 ec 08 85 f6 74 30 48 bd 00 00 00 00 00 fc ff df 31 db 48 89 f8 48 c1 e8 03 80 3c 28 00 <75> 4b 48 8b 07 48 3d 00 01 60 89 72 18 48 3d d0 0d 60 89 73 10 44
RSP: 0018:ffffc90006b76f68 EFLAGS: 00000246
RAX: 1ffff92000d6ee04 RBX: 0000000000000004 RCX: 0000000000000001
RDX: 0000000000000800 RSI: 000000000000001a RDI: ffffc90006b77020
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 000000000000001a
R13: 0000000000000800 R14: ffffc90006b77000 R15: ffffea0000f93b00
FS:  00007fbc6de3a700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f536000 CR3: 00000000803a0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __stack_depot_save+0x35/0x500 lib/stackdepot.c:360
 kasan_save_stack+0x2e/0x40 mm/kasan/common.c:39
 kasan_set_track+0x21/0x30 mm/kasan/common.c:45
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:366 [inline]
 ____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:328
 kasan_slab_free include/linux/kasan.h:236 [inline]
 slab_free_hook mm/slub.c:1728 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1754
 slab_free mm/slub.c:3510 [inline]
 kmem_cache_free+0xdd/0x580 mm/slub.c:3527
 jbd2_free_handle include/linux/jbd2.h:1608 [inline]
 jbd2_journal_stop+0x656/0xf10 fs/jbd2/transaction.c:1937
 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:127
 ext4_dirty_inode+0xe8/0x110 fs/ext4/inode.c:5920
 __mark_inode_dirty+0x45b/0xfe0 fs/fs-writeback.c:2409
 mark_inode_dirty include/linux/fs.h:2372 [inline]
 generic_write_end+0x3ea/0x6e0 fs/buffer.c:2239
 ext4_da_write_end+0x1c2/0x990 fs/ext4/inode.c:3059
 generic_perform_write+0x2c6/0x510 mm/filemap.c:3817
 ext4_buffered_write_iter+0x1ac/0x3b0 fs/ext4/file.c:269
 ext4_file_write_iter+0x423/0x14e0 fs/ext4/file.c:681
 call_write_iter include/linux/fs.h:2079 [inline]
 do_iter_readv_writev+0x472/0x750 fs/read_write.c:725
 do_iter_write+0x188/0x710 fs/read_write.c:851
 vfs_iter_write+0x70/0xa0 fs/read_write.c:892
 iter_file_splice_write+0x723/0xc70 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0x110/0x180 fs/splice.c:936
 splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891
 do_splice_direct+0x1b3/0x280 fs/splice.c:979
 do_sendfile+0xaf2/0x1250 fs/read_write.c:1245
 __do_sys_sendfile64 fs/read_write.c:1310 [inline]
 __se_sys_sendfile64 fs/read_write.c:1296 [inline]
 __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1296
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fbc6f4c4e99
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:00007fbc6de3a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fbc6f5d7f60 RCX: 00007fbc6f4c4e99
RDX: 0000000000000000 RSI: 000000000000000c RDI: 0000000000000005
RBP: 00007fbc6f51eff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffb R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffefd60a1df R14: 00007fbc6de3a300 R15: 0000000000022000
 </TASK>
NMI backtrace for cpu 1
CPU: 1 PID: 18194 Comm: syz-executor.1 Not tainted 5.16.0-rc4-next-20211210-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:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x262/0x3f0 kernel/rcu/tree_stall.h:343
 print_cpu_stall kernel/rcu/tree_stall.h:604 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:688 [inline]
 rcu_pending kernel/rcu/tree.c:3922 [inline]
 rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2620
 update_process_times+0x16d/0x200 kernel/time/timer.c:1785
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1428
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_release+0x3f1/0x720 kernel/locking/lockdep.c:5647
Code: 7e 83 f8 01 0f 85 8d 01 00 00 9c 58 f6 c4 02 0f 85 78 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c5 48 c7 45 00 00 00 00 00 c7 45 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90006b0f1b8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: af718237dabbe561 RCX: ffffc90006b0f208
RDX: 1ffff1100651a14b RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff92000d61e39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000003 R14: ffff8880328d0a60 R15: ffff8880328d0000
 might_alloc include/linux/sched/mm.h:253 [inline]
 slab_pre_alloc_hook mm/slab.h:739 [inline]
 slab_alloc_node mm/slub.c:3145 [inline]
 slab_alloc mm/slub.c:3239 [inline]
 kmem_cache_alloc+0x3e/0x3a0 mm/slub.c:3244
 kmem_cache_zalloc include/linux/slab.h:705 [inline]
 alloc_buffer_head+0x20/0x140 fs/buffer.c:3361
 alloc_page_buffers+0x285/0x7b0 fs/buffer.c:832
 create_empty_buffers+0x2c/0x1060 fs/buffer.c:1597
 ext4_block_write_begin+0x117a/0x16e0 fs/ext4/inode.c:1060
 ext4_da_write_begin+0x3e9/0xba0 fs/ext4/inode.c:2966
 generic_perform_write+0x205/0x510 mm/filemap.c:3806
 ext4_buffered_write_iter+0x1ac/0x3b0 fs/ext4/file.c:269
 ext4_file_write_iter+0x423/0x14e0 fs/ext4/file.c:681
 call_write_iter include/linux/fs.h:2079 [inline]
 do_iter_readv_writev+0x472/0x750 fs/read_write.c:725
 do_iter_write+0x188/0x710 fs/read_write.c:851
 vfs_iter_write+0x70/0xa0 fs/read_write.c:892
 iter_file_splice_write+0x723/0xc70 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0x110/0x180 fs/splice.c:936
 splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891
 do_splice_direct+0x1b3/0x280 fs/splice.c:979
 do_sendfile+0xaf2/0x1250 fs/read_write.c:1245
 __do_sys_sendfile64 fs/read_write.c:1310 [inline]
 __se_sys_sendfile64 fs/read_write.c:1296 [inline]
 __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1296
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fa2e07f3e99
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:00007fa2df169168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fa2e0906f60 RCX: 00007fa2e07f3e99
RDX: 0000000000000000 RSI: 000000000000000c RDI: 0000000000000005
RBP: 00007fa2e084dff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffb R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffda9ea8b7f R14: 00007fa2df169300 R15: 0000000000022000
 </TASK>
sched: RT throttling activated
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	41 54                	push   %r12
   6:	41 89 f4             	mov    %esi,%r12d
   9:	55                   	push   %rbp
   a:	53                   	push   %rbx
   b:	48 83 ec 08          	sub    $0x8,%rsp
   f:	85 f6                	test   %esi,%esi
  11:	74 30                	je     0x43
  13:	48 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbp
  1a:	fc ff df
  1d:	31 db                	xor    %ebx,%ebx
  1f:	48 89 f8             	mov    %rdi,%rax
  22:	48 c1 e8 03          	shr    $0x3,%rax
  26:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
* 2a:	75 4b                	jne    0x77 <-- trapping instruction
  2c:	48 8b 07             	mov    (%rdi),%rax
  2f:	48 3d 00 01 60 89    	cmp    $0xffffffff89600100,%rax
  35:	72 18                	jb     0x4f
  37:	48 3d d0 0d 60 89    	cmp    $0xffffffff89600dd0,%rax
  3d:	73 10                	jae    0x4f
  3f:	44                   	rex.R