rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (0 ticks this GP) idle=9c9/1/0x4000000000000002 softirq=6950/6950 fqs=5249 
	(detected by 1, t=10502 jiffies, g=7613, q=1251)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4430 Comm: syz.0.38 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x58/0x60 kernel/kcov.c:215
Code: 10 16 00 00 83 fa 02 75 21 48 8b 91 18 16 00 00 48 8b 32 48 8d 7e 01 8b 89 14 16 00 00 48 39 cf 73 08 48 89 44 f2 08 48 89 3a <c3> 0f 1f 80 00 00 00 00 48 8b 04 24 65 48 8b 0d c4 41 89 7e 65 8b
RSP: 0018:ffffc900030def98 EFLAGS: 00000093
RAX: ffffffff819818cf RBX: ffffc900030df140 RCX: ffff88807c279dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900030df090 R08: ffffc900030df117 R09: ffffc900030df0e0
R10: dffffc0000000000 R11: fffff5200061be23 R12: dffffc0000000000
R13: ffffc900030df146 R14: 0000000000000000 R15: ffffc900030df300
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbe48eb9a08 CR3: 000000000ce8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 perf_prepare_sample+0xc9f/0x1cb0 kernel/events/core.c:7729
 __perf_event_output kernel/events/core.c:7814 [inline]
 perf_event_output_forward+0x185/0x2e0 kernel/events/core.c:7834
 __perf_event_overflow+0x35f/0x550 kernel/events/core.c:9527
 perf_swevent_overflow kernel/events/core.c:9603 [inline]
 perf_swevent_event+0x4b8/0x540 kernel/events/core.c:9641
 perf_tp_event+0x324/0xbe0 kernel/events/core.c:10059
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10033
 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 d2 f6 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: 0018:ffffc900030df720 EFLAGS: 00000206
RAX: a48cdd7dbb787100 RBX: 1ffff9200061bee8 RCX: a48cdd7dbb787100
RDX: dffffc0000000000 RSI: ffffffff8a2b2b60 RDI: ffffffff8a7a5100
RBP: ffffc900030df7f0 R08: ffffffff910470c7 R09: 1ffffffff2208e18
R10: dffffc0000000000 R11: fffffbfff2208e19 R12: ffffffff8d123400
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
 zap_pte_range mm/memory.c:1384 [inline]
 zap_pmd_range mm/memory.c:1505 [inline]
 zap_pud_range mm/memory.c:1534 [inline]
 zap_p4d_range mm/memory.c:1555 [inline]
 unmap_page_range+0xee4/0x2410 mm/memory.c:1576
 unmap_vmas+0x131/0x250 mm/memory.c:1653
 exit_mmap+0x3b9/0x640 mm/mmap.c:3224
 __mmput+0x115/0x390 kernel/fork.c:1136
 exit_mm+0x632/0x7b0 kernel/exit.c:557
 do_exit+0x5b8/0x2100 kernel/exit.c:877
 do_group_exit+0x12c/0x2f0 kernel/exit.c:1004
 __do_sys_exit_group kernel/exit.c:1015 [inline]
 __se_sys_exit_group kernel/exit.c:1013 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1013
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fbe480fbb19
Code: Unable to access opcode bytes at RIP 0x7fbe480fbaef.
RSP: 002b:00007fffc324bb98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbe480fbb19
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fffc324bbfc R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000015
R13: 00000000000927c0 R14: 000000000003521d R15: 00007fffc324bc50
 </TASK>