rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=4eb/1/0x4000000000000000 softirq=46686/46690 fqs=35 
	(t=10500 jiffies g=87037 q=1189)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10392 jiffies! g87037 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=24746
rcu: rcu_preempt kthread starved for 10393 jiffies! g87037 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
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:28616 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4972 [inline]
 __schedule+0xa9a/0x4940 kernel/sched/core.c:6253
 schedule+0xd2/0x260 kernel/sched/core.c:6326
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
 rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955
 rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128
 kthread+0x405/0x4f0 kernel/kthread.c:327
 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 21097 Comm: syz-executor.0 Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__might_resched+0xe2/0x2c0 kernel/sched/core.c:9540
Code: c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 aa 01 00 00 8b 05 70 82 41 0c 83 e8 01 83 f8 02 76 09 5b 5d 41 5c 41 5d <41> 5e c3 48 c7 c0 c0 59 4c 90 48 ba 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffffc90008bff1d8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888030aeca70
RBP: ffff88802c2173e0 R08: ffff88802c2173e0 R09: 0000000000000001
R10: ffffffff8210ae10 R11: 0000000000000000 R12: ffff88803c174058
R13: ffff88814b8a6000 R14: ffff888030aec080 R15: ffff88814b8a6000
FS:  00007f0116dbb700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e237000 CR3: 0000000032809000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __ext4_journal_get_write_access+0x38/0x540 fs/ext4/ext4_jbd2.c:227
 ext4_reserve_inode_write+0x241/0x3c0 fs/ext4/inode.c:5716
 __ext4_mark_inode_dirty+0x17b/0x8d0 fs/ext4/inode.c:5882
 ext4_dirty_inode+0xd4/0x110 fs/ext4/inode.c:5919
 __mark_inode_dirty+0x45b/0xfe0 fs/fs-writeback.c:2399
 mark_inode_dirty include/linux/fs.h:2451 [inline]
 generic_write_end+0x31b/0x500 fs/buffer.c:2202
 ext4_da_write_end+0x1c2/0x990 fs/ext4/inode.c:3059
 generic_perform_write+0x2c6/0x510 mm/filemap.c:3767
 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:2162 [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+0x6fa/0xc10 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: 0033:0x7f0118445e99
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:00007f0116dbb168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f0118558f60 RCX: 00007f0118445e99
RDX: 0000000000000000 RSI: 000000000000000c RDI: 0000000000000005
RBP: 00007f01184a0031 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffb R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffdcae59cf R14: 00007f0116dbb300 R15: 0000000000022000
 </TASK>
NMI backtrace for cpu 0
CPU: 0 PID: 20886 Comm: syz-executor.4 Not tainted 5.16.0-rc4-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+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
 print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
 rcu_pending kernel/rcu/tree.c:3878 [inline]
 rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2597
 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:unwind_done arch/x86/include/asm/unwind.h:50 [inline]
RIP: 0010:unwind_get_return_address+0x0/0x90 arch/x86/kernel/unwind_orc.c:315
Code: 89 34 24 e8 22 27 89 00 48 8b 34 24 e9 3c ff ff ff e8 f4 26 89 00 eb b4 e8 ed 26 89 00 eb 80 66 66 2e 0f 1f 84 00 00 00 00 00 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 53 48 89 fb
RSP: 0018:ffffc90009faed98 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff8164f110 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffc90009fafb30 RDI: ffffc90009faeda0
RBP: ffffc90009faee28 R08: ffffffff8e19f0d4 R09: 0000000000000001
R10: fffff520013f5dbf R11: 000000000008808a R12: ffffc90009faee58
R13: 0000000000000000 R14: ffff88802dcbe2c0 R15: 0000000000000000
 arch_stack_walk+0x93/0xe0 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
 save_stack+0x151/0x1e0 mm/page_owner.c:119
 __set_page_owner+0x45/0x2d0 mm/page_owner.c:181
 prep_new_page mm/page_alloc.c:2418 [inline]
 get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4149
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5369
 alloc_pages+0x1a7/0x300 mm/mempolicy.c:2191
 folio_alloc+0x1c/0x70 mm/mempolicy.c:2201
 filemap_alloc_folio mm/filemap.c:1036 [inline]
 __filemap_get_folio+0x5f2/0xd60 mm/filemap.c:1951
 pagecache_get_page+0x2c/0x1a0 mm/folio-compat.c:125
 ext4_da_write_begin+0x3bc/0xad0 fs/ext4/inode.c:2958
 generic_perform_write+0x205/0x510 mm/filemap.c:3756
 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:2162 [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+0x6fa/0xc10 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: 0033:0x7f283520ae99
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:00007f2833b80168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f283531df60 RCX: 00007f283520ae99
RDX: 0000000000000000 RSI: 000000000000000c RDI: 0000000000000005
RBP: 00007f2835265031 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffb R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd3db620bf R14: 00007f2833b80300 R15: 0000000000022000
 </TASK>
sched: RT throttling activated
----------------
Code disassembly (best guess):
   0:	c1 e9 03             	shr    $0x3,%ecx
   3:	83 c0 03             	add    $0x3,%eax
   6:	0f b6 14 11          	movzbl (%rcx,%rdx,1),%edx
   a:	38 d0                	cmp    %dl,%al
   c:	7c 08                	jl     0x16
   e:	84 d2                	test   %dl,%dl
  10:	0f 85 aa 01 00 00    	jne    0x1c0
  16:	8b 05 70 82 41 0c    	mov    0xc418270(%rip),%eax        # 0xc41828c
  1c:	83 e8 01             	sub    $0x1,%eax
  1f:	83 f8 02             	cmp    $0x2,%eax
  22:	76 09                	jbe    0x2d
  24:	5b                   	pop    %rbx
  25:	5d                   	pop    %rbp
  26:	41 5c                	pop    %r12
  28:	41 5d                	pop    %r13
* 2a:	41 5e                	pop    %r14 <-- trapping instruction
  2c:	c3                   	retq
  2d:	48 c7 c0 c0 59 4c 90 	mov    $0xffffffff904c59c0,%rax
  34:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  3b:	fc ff df
  3e:	48                   	rex.W
  3f:	89                   	.byte 0x89