rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10500 ticks this GP) idle=127/1/0x4000000000000000 softirq=242175/242175 fqs=2
(t=10502 jiffies g=443945 q=1848)
rcu: rcu_preempt kthread starved for 10499 jiffies! g443945 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:28696 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
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
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: 32228 Comm: kworker/u4:9 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0x452/0xc20 kernel/smp.c:969
Code: 0b 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 90 76 0b 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 33 06 00 00 8b 43 08 31
RSP: 0018:ffffc90005ab6cb8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9d3fca0 RCX: 0000000000000000
RDX: ffff88802dc51d00 RSI: ffffffff816c4e20 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff816c4e46 R11: 0000000000000000 R12: ffffed10173a7f95
R13: 0000000000000001 R14: ffff8880b9d3fca8 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ee26000 CR3: 000000002fc69000 CR4: 0000000000350ef0
Call Trace:
on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1135
__flush_tlb_multi arch/x86/include/asm/paravirt.h:87 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:927 [inline]
flush_tlb_mm_range+0x1d8/0x230 arch/x86/mm/tlb.c:1013
flush_tlb_page arch/x86/include/asm/tlbflush.h:239 [inline]
ptep_clear_flush+0x12b/0x160 mm/pgtable-generic.c:97
page_mkclean_one+0x4cc/0x8c0 mm/rmap.c:935
rmap_walk_file+0x3a5/0x6e0 mm/rmap.c:2356
rmap_walk+0x10d/0x190 mm/rmap.c:2374
folio_mkclean+0x174/0x1a0 mm/rmap.c:1003
folio_clear_dirty_for_io+0x149/0x790 mm/page-writeback.c:2757
mpage_submit_page+0x80/0x2a0 fs/ext4/inode.c:2078
mpage_process_page_bufs+0x681/0x7a0 fs/ext4/inode.c:2212
mpage_prepare_extent_to_map+0x94f/0xe60 fs/ext4/inode.c:2624
ext4_writepages+0x926/0x3b90 fs/ext4/inode.c:2752
do_writepages+0x1ab/0x690 mm/page-writeback.c:2364
__writeback_single_inode+0x126/0xff0 fs/fs-writeback.c:1616
writeback_sb_inodes+0x53d/0xf30 fs/fs-writeback.c:1881
__writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1951
wb_writeback+0x7f8/0xc30 fs/fs-writeback.c:2056
wb_check_old_data_flush fs/fs-writeback.c:2156 [inline]
wb_do_writeback fs/fs-writeback.c:2209 [inline]
wb_workfn+0x8cf/0x12d0 fs/fs-writeback.c:2238
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
NMI backtrace for cpu 1
CPU: 1 PID: 1683 Comm: syz-executor.5 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__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:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 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:1421
__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+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 ee c3 20 f8 48 89 ef e8 36 3a 21 f8 e8 01 eb 41 f8 fb bf 01 00 00 00 66 04 14 f8 65 8b 05 df 5b c6 76 85 c0 74 02 5d c3 0f 1f 44 00
RSP: 0018:ffffc90000dc0e08 EFLAGS: 00000202
RAX: 0000000000cf32f4 RBX: ffffffff873d7b00 RCX: 1ffffffff1adf2c9
RDX: 0000000000000000 RSI: 0000000000000101 RDI: 0000000000000001
RBP: ffff8880b9d28280 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817dff48 R11: 0000000000000000 R12: ffffc90000dc0e98
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880b9d28280
expire_timers kernel/time/timer.c:1465 [inline]
__run_timers.part.0+0x665/0xa20 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:197
Code: 01 f0 4d 89 03 e9 63 fd ff ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 00 <65> 8b 05 49 ab 8a 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b
RSP: 0018:ffffc900121f7a38 EFLAGS: 00000287
RAX: 0000000000000000 RBX: 0000000000000006 RCX: ffff888033bc9d00
RDX: 0000000000000000 RSI: ffff888033bc9d00 RDI: 0000000000000003
RBP: ffff88807e5c3780 R08: 0000000000000000 R09: 0000000000000006
R10: ffffffff83a1eeba R11: 0000000000000010 R12: 0000000000000010
R13: 0000000000000116 R14: dffffc0000000000 R15: 0000000000000000
tomoyo_domain_quota_is_ok+0x2f1/0x550 security/tomoyo/util.c:1093
tomoyo_supervisor+0x2f2/0xf00 security/tomoyo/common.c:2089
tomoyo_audit_path_number_log security/tomoyo/file.c:235 [inline]
tomoyo_path_number_perm+0x419/0x590 security/tomoyo/file.c:734
security_file_ioctl+0x50/0xb0 security/security.c:1541
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0xb3/0x200 fs/ioctl.c:860
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: 0033:0x7ffb227c6ae9
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:00007ffb1fd3c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffb228d9f60 RCX: 00007ffb227c6ae9
RDX: 0000000020000080 RSI: 0000000000008933 RDI: 0000000000000006
RBP: 00007ffb22820f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffed09778f R14: 00007ffb1fd3c300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 0b 00 or (%rax),%eax
2: 85 ed test %ebp,%ebp
4: 74 4d je 0x53
6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
d: fc ff df
10: 4d 89 f4 mov %r14,%r12
13: 4c 89 f5 mov %r14,%rbp
16: 49 c1 ec 03 shr $0x3,%r12
1a: 83 e5 07 and $0x7,%ebp
1d: 49 01 c4 add %rax,%r12
20: 83 c5 03 add $0x3,%ebp
23: e8 90 76 0b 00 callq 0xb76b8
28: f3 90 pause
* 2a: 41 0f b6 04 24 movzbl (%r12),%eax <-- trapping instruction
2f: 40 38 c5 cmp %al,%bpl
32: 7c 08 jl 0x3c
34: 84 c0 test %al,%al
36: 0f 85 33 06 00 00 jne 0x66f
3c: 8b 43 08 mov 0x8(%rbx),%eax
3f: 31 .byte 0x31