rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10491 ticks this GP) idle=e12/1/0x4000000000000000 softirq=188615/188617 fqs=1 
	(t=10501 jiffies g=349669 q=15)
rcu: rcu_preempt kthread starved for 10500 jiffies! g349669 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:28816 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4339 [inline]
 __schedule+0x916/0x23e0 kernel/sched/core.c:5147
 schedule+0xcf/0x270 kernel/sched/core.c:5226
 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2004 [inline]
 rcu_gp_kthread+0xd07/0x2300 kernel/rcu/tree.c:2177
 kthread+0x3b1/0x4a0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
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: 16819 Comm: syz-executor.1 Not tainted 5.13.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_is_held_type+0xfd/0x140 kernel/locking/lockdep.c:5560
Code: 00 00 b8 ff ff ff ff 65 0f c1 05 7e 0d ec 76 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb b9 0f 0b 48
RSP: 0018:ffffc90000007ce8 EFLAGS: 00000086
RAX: 0000000000000046 RBX: 0000000000000004 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000010003 RDI: 0000000000000000
RBP: ffffffff8bf791e0 R08: 0000000000000000 R09: ffffffff8dc95717
R10: fffffbfff1b92ae2 R11: 0000000000000000 R12: ffff8880a4418000
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff8880a4418a70
FS:  00007f16fa28f700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2bc35000 CR3: 00000000a6ed7000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_is_held include/linux/lockdep.h:283 [inline]
 rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x5e9/0x740 kernel/locking/lockdep.c:5483
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline]
 _raw_spin_lock_irq+0x32/0x50 kernel/locking/spinlock.c:167
 __run_hrtimer kernel/time/hrtimer.c:1541 [inline]
 __hrtimer_run_queues+0x243/0xe40 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:121 [inline]
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x3c4/0xb40 kernel/locking/qspinlock.c:508
Code: 00 48 c1 e9 03 83 e3 07 41 be 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 2c 01 eb 0c f3 90 41 83 ec 01 0f 84 72 04 00 00 <41> 0f b6 45 00 38 d8 7f 08 84 c0 0f 85 91 05 00 00 0f b6 45 00 84
RSP: 0018:ffffc90001f2edc8 EFLAGS: 00000216
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 1ffff11005201208
RDX: 0000000000000001 RSI: ffffffff817adf41 RDI: ffffffff8132b571
RBP: ffff888029009040 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817adf09 R11: 0000000000000000 R12: 000000000000465f
R13: ffffed1005201208 R14: 0000000000000001 R15: ffff8880b9c36000
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock+0x200/0x2b0 kernel/locking/spinlock_debug.c:113
 spin_lock include/linux/spinlock.h:354 [inline]
 ext4_lock_group+0x1e5/0x240 fs/ext4/ext4.h:3446
 ext4_free_blocks+0x167b/0x1e50 fs/ext4/mballoc.c:5986
 ext4_ext_try_to_merge_up fs/ext4/extents.c:1830 [inline]
 ext4_ext_try_to_merge+0x57e/0x710 fs/ext4/extents.c:1857
 ext4_convert_unwritten_extents_endio fs/ext4/extents.c:3721 [inline]
 ext4_ext_handle_unwritten_extents fs/ext4/extents.c:3849 [inline]
 ext4_ext_map_blocks+0x365f/0x5fb0 fs/ext4/extents.c:4119
 ext4_map_blocks+0x653/0x17d0 fs/ext4/inode.c:638
 ext4_convert_unwritten_extents+0x20e/0x5b0 fs/ext4/extents.c:4760
 ext4_dio_write_end_io+0x126/0x170 fs/ext4/file.c:381
 iomap_dio_complete+0x191/0x780 fs/iomap/direct-io.c:88
 iomap_dio_rw+0x62/0x90 fs/iomap/direct-io.c:652
 ext4_dio_write_iter fs/ext4/file.c:568 [inline]
 ext4_file_write_iter+0xe18/0x14e0 fs/ext4/file.c:678
 call_write_iter include/linux/fs.h:2114 [inline]
 do_iter_readv_writev+0x46f/0x740 fs/read_write.c:740
 do_iter_write+0x188/0x670 fs/read_write.c:866
 vfs_iter_write+0x70/0xa0 fs/read_write.c:907
 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+0x9f0/0x1110 fs/read_write.c:1260
 __do_sys_sendfile64 fs/read_write.c:1325 [inline]
 __se_sys_sendfile64 fs/read_write.c:1311 [inline]
 __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1311
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
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:00007f16fa28f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000401ffc000 R11: 0000000000000246 R12: 000000000056bf60
R13: 0000000000a9fb1f R14: 00007f16fa28f300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 16821 Comm: syz-executor.2 Not tainted 5.13.0-rc1-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:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 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:341
 print_cpu_stall kernel/rcu/tree_stall.h:624 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:699 [inline]
 rcu_pending kernel/rcu/tree.c:3911 [inline]
 rcu_sched_clock_irq.cold+0x3f1/0x74b kernel/rcu/tree.c:2649
 update_process_times+0x16d/0x200 kernel/time/timer.c:1796
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1373
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:mac80211_hwsim_tx_frame_no_nl.isra.0+0x77b/0x1330 drivers/net/wireless/mac80211_hwsim.c:1525
Code: 00 00 00 c6 84 24 98 00 00 00 00 74 bb e8 fd bf 4c fc 48 8d bb a4 3c 00 00 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 0f b6 04 28 <38> d0 7f 08 84 c0 0f 85 36 09 00 00 44 0f b6 bb a4 3c 00 00 31 ff
RSP: 0018:ffffc90000dc0ba0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff88808f6831e0 RCX: 0000000000000100
RDX: 0000000000000004 RSI: ffffffff85281243 RDI: ffff88808f686e84
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff85281279 R11: 0000000000000000 R12: ffff8880ac964500
R13: ffff888073b93410 R14: ffff888073b931e0 R15: 0000000000000000
 mac80211_hwsim_tx_frame+0x14f/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1775
 mac80211_hwsim_beacon_tx+0x4ba/0x910 drivers/net/wireless/mac80211_hwsim.c:1829
 __iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793
 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:829
 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1852
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1601
 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1618
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:559
 invoke_softirq kernel/softirq.c:433 [inline]
 __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:ext4_mb_use_best_found+0x1f7/0x8d0 fs/ext4/mballoc.c:2013
Code: 8d 74 24 30 41 8b 54 24 20 48 b8 00 00 00 00 00 fc ff df 4c 89 f1 48 c1 e9 03 0f b6 04 01 84 c0 74 08 3c 03 0f 8e c3 05 00 00 <41> 89 54 24 30 48 89 df 4c 89 f6 e8 39 f0 ff ff 49 8d 7c 24 40 48
RSP: 0018:ffffc90001f5e600 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90001f5e880 RCX: 1ffff1100e92e772
RDX: 0000000000000000 RSI: ffffffff8210ce20 RDI: ffff888074973b80
RBP: ffffc90001f5e638 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8210ce11 R11: 0000000000000002 R12: ffff888074973b60
R13: ffff888074973bc6 R14: ffff888074973b90 R15: ffff888074973b9c
 ext4_mb_measure_extent fs/ext4/mballoc.c:2121 [inline]
 ext4_mb_complex_scan_group+0x6dd/0x9e0 fs/ext4/mballoc.c:2360
 ext4_mb_regular_allocator+0xdb0/0x37c0 fs/ext4/mballoc.c:2759
 ext4_mb_new_blocks+0x2480/0x5220 fs/ext4/mballoc.c:5514
 ext4_new_meta_blocks+0x2fe/0x360 fs/ext4/balloc.c:693
 ext4_ext_grow_indepth fs/ext4/extents.c:1276 [inline]
 ext4_ext_create_new_leaf fs/ext4/extents.c:1380 [inline]
 ext4_ext_insert_extent+0x102b/0x4170 fs/ext4/extents.c:2054
 ext4_split_extent_at+0x42b/0xe40 fs/ext4/extents.c:3208
 ext4_split_extent+0x21f/0x530 fs/ext4/extents.c:3306
 ext4_ext_handle_unwritten_extents fs/ext4/extents.c:3827 [inline]
 ext4_ext_map_blocks+0x2ff1/0x5fb0 fs/ext4/extents.c:4119
 ext4_map_blocks+0x653/0x17d0 fs/ext4/inode.c:638
 ext4_iomap_alloc fs/ext4/inode.c:3426 [inline]
 ext4_iomap_begin+0x463/0x7a0 fs/ext4/inode.c:3476
 iomap_apply+0x177/0xb50 fs/iomap/apply.c:46
 __iomap_dio_rw+0x719/0x1330 fs/iomap/direct-io.c:561
 iomap_dio_rw+0x30/0x90 fs/iomap/direct-io.c:649
 ext4_dio_write_iter fs/ext4/file.c:568 [inline]
 ext4_file_write_iter+0xe18/0x14e0 fs/ext4/file.c:678
 call_write_iter include/linux/fs.h:2114 [inline]
 do_iter_readv_writev+0x46f/0x740 fs/read_write.c:740
 do_iter_write+0x188/0x670 fs/read_write.c:866
 vfs_iter_write+0x70/0xa0 fs/read_write.c:907
 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+0x9f0/0x1110 fs/read_write.c:1260
 __do_sys_sendfile64 fs/read_write.c:1325 [inline]
 __se_sys_sendfile64 fs/read_write.c:1311 [inline]
 __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1311
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
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:00007fe0b5327188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000401ffc000 R11: 0000000000000246 R12: 000000000056bf60
R13: 0000000000a9fb1f R14: 00007fe0b5327300 R15: 0000000000022000