rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10578 ticks this GP) idle=62fc/1/0x4000000000000000 softirq=50712/50714 fqs=680
	(t=10500 jiffies g=74001 q=77 ncpus=2)
rcu: rcu_preempt kthread starved for 9133 jiffies! g74001 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27760 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
 schedule+0xb9/0x180 kernel/sched/core.c:6638
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x303/0x1340 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 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: 0 Comm: swapper/1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:131 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x213/0x290 mm/kasan/generic.c:189
Code: 48 c1 eb 20 84 db 75 7b 4c 89 fb 48 c1 eb 28 84 db 75 77 49 c1 ef 30 bb 07 00 00 00 45 84 ff 75 70 4d 01 f3 49 01 db 4d 89 df <4d> 85 db 74 97 4d 01 d1 4d 39 cf 75 0d 41 83 e0 07 4d 0f be 09 4d
RSP: 0018:ffffc900001e0a50 EFLAGS: 00000002
RAX: 00000000ffffff01 RBX: ffffffffffffffff RCX: ffffffff81658438
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc900001e0ac0
RBP: ffffc900001e0b30 R08: ffffc900001e0ac3 R09: 1ffff9200003c158
R10: dffffc0000000000 R11: fffff5200003c158 R12: dffffc0000000001
R13: ffffffff96e2b370 R14: 1ffff9200003c158 R15: fffff5200003c158
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0633f98228 CR3: 00000000294f5000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
 atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:542 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
 do_raw_spin_lock+0x128/0x2f0 kernel/locking/spinlock_debug.c:115
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
 _raw_spin_lock_irqsave+0xbc/0x100 kernel/locking/spinlock.c:162
 debug_object_deactivate+0x62/0x390 lib/debugobjects.c:753
 debug_timer_deactivate kernel/time/timer.c:787 [inline]
 debug_deactivate kernel/time/timer.c:831 [inline]
 detach_timer+0x30/0x350 kernel/time/timer.c:878
 expire_timers kernel/time/timer.c:1735 [inline]
 __run_timers+0x4c0/0x800 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:default_idle+0xb/0x10 arch/x86/kernel/process.c:742
Code: 48 89 df e8 77 a3 9b f7 e9 44 ff ff ff e8 3d 07 f6 ff 00 00 cc cc 00 00 cc cc 00 00 cc cc 00 66 90 0f 00 2d a7 ca 4e 00 fb f4 <c3> 0f 1f 40 00 41 57 41 56 53 49 be 00 00 00 00 00 fc ff df 65 48
RSP: 0018:ffffc90000177de8 EFLAGS: 000002c6
RAX: e1c2849331635c00 RBX: ffffffff8a37e307 RCX: e1c2849331635c00
RDX: 0000000000000001 RSI: ffffffff8a8c1120 RDI: ffffffff8adf1320
RBP: ffffc90000177f20 R08: ffff8880b8f3580b R09: 1ffff110171e6b01
R10: dffffc0000000000 R11: ffffed10171e6b02 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888017739dc0 R15: 1ffff9200002efc8
 default_idle_call+0x84/0xc0 kernel/sched/idle.c:109
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x250/0x680 kernel/sched/idle.c:323
 cpu_startup_entry+0x3f/0x60 kernel/sched/idle.c:422
 start_secondary+0xe4/0xf0 arch/x86/kernel/smpboot.c:281
 secondary_startup_64_no_verify+0xcf/0xdb
 </TASK>
CPU: 0 PID: 13015 Comm: syz.6.2628 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x41/0x60 kernel/kcov.c:221
Code: ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 fc 15 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2
RSP: 0018:ffffc9000538fba8 EFLAGS: 00000246
RAX: ffffffff83ce7122 RBX: dffffc0000000000 RCX: ffff88807c123b80
RDX: ffffc90003cc9000 RSI: 000000000007ffff RDI: 0000000000000002
RBP: ffff88801ebdbf90 R08: ffff88801ebdbfbf R09: 1ffff11003d7b7f7
R10: dffffc0000000000 R11: ffffed1003d7b7f8 R12: ffff88801ebdbfb0
R13: 0000000000000064 R14: 0000000000000063 R15: 0000000000000001
FS:  00007f74c7c376c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3121bff8 CR3: 0000000065704000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tomoyo_check_acl+0x302/0x3f0 security/tomoyo/domain.c:183
 tomoyo_path_number_perm+0x379/0x650 security/tomoyo/file.c:733
 security_file_ioctl+0x6c/0xa0 security/security.c:1569
 __do_sys_ioctl fs/ioctl.c:864 [inline]
 __se_sys_ioctl+0x48/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f74c6d9cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f74c7c37028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f74c7015fa0 RCX: 00007f74c6d9cdd9
RDX: 00007cb7562f2d67 RSI: 000000000000545c RDI: 0000000000000004
RBP: 00007f74c6e32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f74c7016038 R14: 00007f74c7015fa0 R15: 00007ffd861f7988
 </TASK>