rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10500 ticks this GP) idle=0e9/1/0x4000000000000000 softirq=8929/8929 fqs=0 
	(t=10502 jiffies g=10857 q=75)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10502 jiffies! g10857 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=5840
rcu: rcu_preempt kthread starved for 10505 jiffies! g10857 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:28720 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:1971
 rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2144
 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:
NMI backtrace for cpu 0
CPU: 0 PID: 4235 Comm: syz-executor.5 Not tainted 5.16.0-rc5-next-20211220-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_check_gp_kthread_starvation.cold+0x1fb/0x200 kernel/rcu/tree_stall.h:458
 print_cpu_stall kernel/rcu/tree_stall.h:602 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:688 [inline]
 rcu_pending kernel/rcu/tree.c:3927 [inline]
 rcu_sched_clock_irq.cold+0x98/0x746 kernel/rcu/tree.c:2625
 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_next_frame+0xd0a/0x1ce0 arch/x86/kernel/unwind_orc.c:539
Code: 28 84 c0 48 8b 4c 24 30 0f 84 21 07 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 08 4c 8b 64 24 60 48 c1 ea 03 80 3c 02 00 <0f> 85 86 0e 00 00 48 8b 14 24 4d 89 66 38 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc9000eb1ef20 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff92001d63dec RCX: ffffffff8e208d35
RDX: 1ffff92001d63e06 RSI: ffffc9000eb1f430 RDI: ffffc9000eb1f430
RBP: 0000000000000001 R08: ffffffff8e208d30 R09: 0000000000000001
R10: fffff52001d63e0a R11: 0000000000088077 R12: ffffc9000eb1f438
R13: ffffc9000eb1f02d R14: ffffc9000eb1eff8 R15: ffffffff8e208d34
 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:436 [inline]
 __kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:469
 kasan_slab_alloc include/linux/kasan.h:260 [inline]
 slab_post_alloc_hook mm/slab.h:766 [inline]
 slab_alloc_node mm/slub.c:3231 [inline]
 slab_alloc mm/slub.c:3239 [inline]
 kmem_cache_alloc+0x202/0x3a0 mm/slub.c:3244
 kmem_cache_zalloc include/linux/slab.h:705 [inline]
 jbd2_alloc_handle include/linux/jbd2.h:1603 [inline]
 new_handle fs/jbd2/transaction.c:481 [inline]
 jbd2__journal_start+0x191/0x930 fs/jbd2/transaction.c:508
 __ext4_journal_start_sb+0x227/0x4a0 fs/ext4/ext4_jbd2.c:105
 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
 ext4_dirty_inode+0x9d/0x110 fs/ext4/inode.c:5923
 __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:3060
 generic_perform_write+0x2c6/0x510 mm/filemap.c:3820
 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+0x47a/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: 0033:0x7f253b37ae99
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:00007f2539cf0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f253b48df60 RCX: 00007f253b37ae99
RDX: 0000000000000000 RSI: 000000000000000c RDI: 0000000000000006
RBP: 00007f253b3d4ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffb R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd03cead5f R14: 00007f2539cf0300 R15: 0000000000022000
 </TASK>
NMI backtrace for cpu 0
CPU: 0 PID: 4235 Comm: syz-executor.5 Not tainted 5.16.0-rc5-next-20211220-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:3927 [inline]
 rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2625
 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_next_frame+0xd0a/0x1ce0 arch/x86/kernel/unwind_orc.c:539
Code: 28 84 c0 48 8b 4c 24 30 0f 84 21 07 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 08 4c 8b 64 24 60 48 c1 ea 03 80 3c 02 00 <0f> 85 86 0e 00 00 48 8b 14 24 4d 89 66 38 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc9000eb1ef20 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff92001d63dec RCX: ffffffff8e208d35
RDX: 1ffff92001d63e06 RSI: ffffc9000eb1f430 RDI: ffffc9000eb1f430
RBP: 0000000000000001 R08: ffffffff8e208d30 R09: 0000000000000001
R10: fffff52001d63e0a R11: 0000000000088077 R12: ffffc9000eb1f438
R13: ffffc9000eb1f02d R14: ffffc9000eb1eff8 R15: ffffffff8e208d34
 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:436 [inline]
 __kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:469
 kasan_slab_alloc include/linux/kasan.h:260 [inline]
 slab_post_alloc_hook mm/slab.h:766 [inline]
 slab_alloc_node mm/slub.c:3231 [inline]
 slab_alloc mm/slub.c:3239 [inline]
 kmem_cache_alloc+0x202/0x3a0 mm/slub.c:3244
 kmem_cache_zalloc include/linux/slab.h:705 [inline]
 jbd2_alloc_handle include/linux/jbd2.h:1603 [inline]
 new_handle fs/jbd2/transaction.c:481 [inline]
 jbd2__journal_start+0x191/0x930 fs/jbd2/transaction.c:508
 __ext4_journal_start_sb+0x227/0x4a0 fs/ext4/ext4_jbd2.c:105
 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
 ext4_dirty_inode+0x9d/0x110 fs/ext4/inode.c:5923
 __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:3060
 generic_perform_write+0x2c6/0x510 mm/filemap.c:3820
 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+0x47a/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: 0033:0x7f253b37ae99
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:00007f2539cf0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f253b48df60 RCX: 00007f253b37ae99
RDX: 0000000000000000 RSI: 000000000000000c RDI: 0000000000000006
RBP: 00007f253b3d4ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffb R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd03cead5f R14: 00007f2539cf0300 R15: 0000000000022000
 </TASK>
sched: RT throttling activated
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	84 c0                	test   %al,%al
   2:	48 8b 4c 24 30       	mov    0x30(%rsp),%rcx
   7:	0f 84 21 07 00 00    	je     0x72e
   d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  14:	fc ff df
  17:	48 8b 54 24 08       	mov    0x8(%rsp),%rdx
  1c:	4c 8b 64 24 60       	mov    0x60(%rsp),%r12
  21:	48 c1 ea 03          	shr    $0x3,%rdx
  25:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
* 29:	0f 85 86 0e 00 00    	jne    0xeb5 <-- trapping instruction
  2f:	48 8b 14 24          	mov    (%rsp),%rdx
  33:	4d 89 66 38          	mov    %r12,0x38(%r14)
  37:	48                   	rex.W
  38:	b8 00 00 00 00       	mov    $0x0,%eax
  3d:	00 fc                	add    %bh,%ah