rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 4261 jiffies s: 60425 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 12122 Comm: syz-executor Not tainted 6.10.0-syzkaller-09704-gcc73bbab4b1f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:lock_release+0x13b/0xa30 kernel/locking/lockdep.c:5772
Code: 00 48 89 44 24 20 48 8d 98 dc 0a 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 fb 05 00 00 83 3b 00 0f 85 14 05 00 00 <4c> 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 6f e2 89 00
RSP: 0018:ffffc90000a188c0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88807978c6dc RCX: ffffffff816fa320
RDX: 0000000000000000 RSI: ffffffff8c2068e0 RDI: ffffffff8c2068a0
RBP: ffffc90000a18a00 R08: ffffffff8faf0aef R09: 1ffffffff1f5e15d
R10: dffffc0000000000 R11: fffffbfff1f5e15e R12: 1ffff92000143124
R13: ffffffff89951fa2 R14: ffffffff8e336e20 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1e2af06000 CR3: 000000000e134000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rcu_lock_release include/linux/rcupdate.h:337 [inline]
 rcu_read_unlock include/linux/rcupdate.h:870 [inline]
 advance_sched+0xb32/0xca0 net/sched/sch_taprio.c:987
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:321 [inline]
RIP: 0010:handle_softirqs+0x1df/0x970 kernel/softirq.c:542
Code: 89 7c 24 70 0f b7 db 48 c7 c7 60 be c9 8b e8 e8 1d 37 0a 65 66 c7 05 46 c4 ac 7e 00 00 e8 f9 9c 43 00 fb 49 c7 c4 c0 a0 00 8e <b8> ff ff ff ff 0f bc c3 41 89 c7 41 ff c7 0f 84 e6 03 00 00 89 5c
RSP: 0018:ffffc90000a18e40 EFLAGS: 00000286
RAX: 7af46ccde0399600 RBX: 0000000000000386 RCX: ffffffff947e8703
RDX: dffffc0000000000 RSI: ffffffff8bcac920 RDI: ffffffff8c206900
RBP: ffffc90000a18f50 R08: ffffffff8faf0aef R09: 1ffffffff1f5e15d
R10: dffffc0000000000 R11: fffffbfff1f5e15e R12: ffffffff8e00a0c0
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920001431dc
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x658/0xa30 kernel/locking/lockdep.c:5784
Code: 3c 3b 00 74 08 4c 89 f7 e8 85 dd 89 00 f6 84 24 91 00 00 00 02 75 77 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc9000ef176a0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92001de2ee6 RCX: ffffc9000ef17703
RDX: 0000000000000000 RSI: ffffffff8bcadaa0 RDI: ffffffff8c206900
RBP: ffffc9000ef177e0 R08: ffffffff8faf0aef R09: 1ffffffff1f5e15d
R10: dffffc0000000000 R11: fffffbfff1f5e15e R12: 1ffff92001de2ee0
R13: 0000000000000246 R14: ffffc9000ef17730 R15: dffffc0000000000
 rcu_lock_release include/linux/rcupdate.h:337 [inline]
 rcu_read_unlock include/linux/rcupdate.h:870 [inline]
 page_ext_put+0xa3/0xc0 mm/page_ext.c:546
 __reset_page_owner+0x2bd/0x3f0 mm/page_owner.c:300
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1093 [inline]
 free_unref_page+0xd22/0xea0 mm/page_alloc.c:2588
 vfree+0x186/0x2e0 mm/vmalloc.c:3363
 kcov_put kernel/kcov.c:429 [inline]
 kcov_close+0x2b/0x50 kernel/kcov.c:525
 __fput+0x24a/0x8a0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:222
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xa2f/0x27f0 kernel/exit.c:877
 do_group_exit+0x207/0x2c0 kernel/exit.c:1026
 get_signal+0x16a1/0x1740 kernel/signal.c:2917
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f58597749fc
Code: Unable to access opcode bytes at 0x7f58597749d2.
RSP: 002b:00007ffecb31e2f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 00007f58597749fc
RDX: 0000000000000028 RSI: 00007ffecb31e3e0 RDI: 00000000000000f9
RBP: 00007ffecb31e36c R08: 0000000000000000 R09: 0079746972756365
R10: 00007f58598d17e0 R11: 0000000000000246 R12: 00007ffecb31e3e0
R13: 000055556ea535eb R14: 000055556ea53590 R15: 000000000007f07f
 </TASK>