rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (0 ticks this GP) idle=bb1/1/0x4000000000000002 softirq=5227/5227 fqs=2099 
	(detected by 1, t=10502 jiffies, g=4737, q=621)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4197 Comm: syz-executor237 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__rcu_read_unlock+0x53/0xd0 kernel/rcu/tree_plugin.h:425
Code: 43 0f b6 04 3c 84 c0 75 48 ff 0b 75 1d 4c 8d b7 40 04 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84 c0 75 5f 41 83 3e 00 75 20 <43> 0f b6 04 3c 84 c0 75 3a 8b 03 3d 00 00 00 40 73 0a 5b 41 5c 41
RSP: 0000:ffffc90002eef330 EFLAGS: 00000046
RAX: 265a8810d0113b00 RBX: ffff8880793a21fc RCX: ffffffff816580d1
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8880793a1dc0
RBP: ffffc90002eef478 R08: ffff8880793a1dc7 R09: 1ffff1100f2743b8
R10: dffffc0000000000 R11: ffffed100f2743b9 R12: 1ffff1100f27443f
R13: 1ffff920005dde70 R14: ffff8880793a2200 R15: dffffc0000000000
FS:  00005555623873c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb5f9b50920 CR3: 0000000071215000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 __perf_event_output kernel/events/core.c:7813 [inline]
 perf_event_output_forward+0x255/0x2e0 kernel/events/core.c:7822
 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515
 perf_swevent_overflow kernel/events/core.c:9591 [inline]
 perf_swevent_event+0x4ad/0x530 kernel/events/core.c:9629
 perf_tp_event+0x383/0xbf0 kernel/events/core.c:10047
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021
 perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 e2 f0 9c 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0000:ffffc90002eefa00 EFLAGS: 00000206
RAX: 265a8810d0113b00 RBX: 1ffff920005ddf44 RCX: 265a8810d0113b00
RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: ffffffff8a79f800
RBP: ffffc90002eefad0 R08: ffffffff901d30c7 R09: 1ffffffff203a618
R10: dffffc0000000000 R11: fffffbfff203a619 R12: ffffffff8c322f00
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 __unlock_page_memcg+0xea/0x100 mm/memcontrol.c:2093
 wp_page_copy+0xef5/0x2050 mm/memory.c:3148
 handle_pte_fault mm/memory.c:4668 [inline]
 __handle_mm_fault mm/memory.c:4785 [inline]
 handle_mm_fault+0x1f06/0x4410 mm/memory.c:4883
 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1355
 handle_page_fault arch/x86/mm/fault.c:1443 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1496
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7fb5f9a8cc31
Code: 89 f5 41 54 41 89 fc 55 53 48 83 ec 28 89 54 24 1c 64 48 8b 1c 25 10 00 00 00 48 39 1d 00 3d 0c 00 74 1c 31 c0 ba 01 00 00 00 <f0> 0f b1 15 e7 3c 0c 00 0f 85 86 02 00 00 48 89 1d e2 3c 0c 00 83
RSP: 002b:00007ffd9b296570 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00005555623873c0 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 00007fb5f9b4e120 RDI: 0000000000000000
RBP: 00000000000003e8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb5f9b4e120 R14: 00007fb5f9b4fb2c R15: 00007fb5f9b4fb20
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.017 msecs