rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2673 jiffies s: 96229 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5066 Comm: syz-executor.2 Not tainted 6.5.0-rc4-syzkaller-01192-g66244337512f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:207
Code: 6d 99 7d 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 80 b9 03 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 04 16 00 00 <85> c0 74 2b 8b 82 e0 15 00 00 83 f8 02 75 20 48 8b 8a e8 15 00 00
RSP: 0018:ffffc90000007bb8 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffffc90018643270 RCX: 0000000000000100
RDX: ffff888076fa1dc0 RSI: ffffffff885a144c RDI: 0000000000000006
RBP: ffff888015f45300 R08: 0000000000000006 R09: 000000000001c9c3
R10: 0000000000000000 R11: 0000000000094000 R12: 000000000001c9c3
R13: 0000000000000000 R14: fffffff0a3da8872 R15: 0000000000000001
FS:  000055555671a480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc39906f88 CR3: 000000004767d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 pie_calculate_probability+0x41c/0x850 net/sched/sch_pie.c:409
 fq_pie_timer+0x1da/0x4f0 net/sched/sch_fq_pie.c:387
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x764/0xb10 kernel/time/timer.c:2022
 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
 __do_softirq+0x218/0x965 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1109
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:stack_trace_save+0x83/0xd0 kernel/stacktrace.c:122
Code: 89 44 24 78 31 c0 8d 42 01 48 89 7c 24 20 48 c7 c7 80 f4 73 81 48 c7 44 24 30 00 00 00 00 48 c1 e0 20 48 09 c6 48 89 74 24 28 <48> 8d 74 24 20 65 48 8b 14 25 80 b9 03 00 e8 6a 45 bd ff 8b 44 24
RSP: 0018:ffffc900048df790 EFLAGS: 00000202
RAX: 0000000100000000 RBX: fffff5200091bef2 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000100000040 RDI: ffffffff8173f480
RBP: ffffc900048df820 R08: ffffc900048dfa30 R09: 0000000000000000
R10: ffffed10041bca00 R11: 0000000000000000 R12: 0000000000000c40
R13: 0000000000001000 R14: ffffffff83dcf9d9 R15: ffff888035a77d60
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:196 [inline]
 __do_kmalloc_node mm/slab_common.c:985 [inline]
 __kmalloc+0x5d/0x100 mm/slab_common.c:998
 kmalloc include/linux/slab.h:586 [inline]
 tomoyo_realpath_from_path+0xb9/0x710 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x271/0x450 security/tomoyo/file.c:822
 tomoyo_path_unlink+0x92/0xd0 security/tomoyo/tomoyo.c:161
 security_path_unlink+0xf9/0x160 security/security.c:1728
 do_unlinkat+0x375/0x6d0 fs/namei.c:4392
 __do_sys_unlink fs/namei.c:4443 [inline]
 __se_sys_unlink fs/namei.c:4441 [inline]
 __x64_sys_unlink+0xc8/0x110 fs/namei.c:4441
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd05147c297
Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc39907738 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd05147c297
RDX: 00007ffc39907760 RSI: 00007ffc399077f0 RDI: 00007ffc399077f0
RBP: 00007ffc399077f0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffc399088b0
R13: 00007fd0514c73b9 R14: 0000000000145b2e R15: 000000000000001e
 </TASK>