rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=c47/1/0x4000000000000002 softirq=28166/28167 fqs=5215 
	(detected by 1, t=10502 jiffies, g=29973, q=173590)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 12801 Comm: syz.0.4134 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:check_kcov_mode kernel/kcov.c:174 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:227 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x2c/0x80 kernel/kcov.c:293
Code: 04 24 65 48 8b 0d 64 23 89 7e 65 8b 15 65 23 89 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 5b 83 b9 34 16 00 00 00 74 52 <8b> 91 10 16 00 00 83 fa 03 75 47 48 8b 91 18 16 00 00 44 8b 89 14
RSP: 0000:ffffc9000402f7f8 EFLAGS: 00000046
RAX: ffffffff81812454 RBX: 0000000000000014 RCX: ffff88802a6d3b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000000 R08: ffff8880b903b30b R09: 1ffff11017207661
R10: dffffc0000000000 R11: ffffed1017207662 R12: ffffffff8be35820
R13: dffffc0000000000 R14: ffffc9000402f880 R15: 0000000000000000
FS:  0000555589081500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2e2b0e3000 CR3: 000000007c641000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 perf_trace_buf_alloc+0x144/0x300 kernel/trace/trace_event_perf.c:420
 perf_trace_preemptirq_template+0x180/0x360 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 f2 cc 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:ffffc9000402fa00 EFLAGS: 00000206
RAX: 4210c3900f866a00 RBX: 1ffff92000805f44 RCX: 4210c3900f866a00
RDX: dffffc0000000000 RSI: ffffffff8a2b3180 RDI: ffffffff8a7a09c0
RBP: ffffc9000402fad0 R08: ffffffff901d80c7 R09: 1ffffffff203b018
R10: dffffc0000000000 R11: fffffbfff203b019 R12: ffffffff8c323800
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: 0033:0x7f2e2ad365c3
Code: 53 48 83 ec 38 80 3d 5b ca 3a 00 00 89 7c 24 18 48 89 74 24 28 0f 85 cd 09 00 00 80 3d 2a 01 ee 00 00 49 89 f1 41 89 d2 89 cb <c6> 05 36 ca 3a 00 01 41 89 d7 0f 85 45 04 00 00 80 3d f6 00 ee 00
RSP: 002b:00007ffe8b311630 EFLAGS: 00010246
RAX: 00007f2e2b0e6fa0 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000003 RSI: 00007f2e2b0e7038 RDI: 0000000000000000
RBP: 00007f2e2b0e6fb0 R08: 0000000000000000 R09: 00007f2e2b0e7038
R10: 0000000000000003 R11: 0000000000000000 R12: 00007f2e2b0e6fa0
R13: 0000200000000000 R14: 00007ffe8b3116a8 R15: 00007f2e2b0e6fa0
 </TASK>