rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 ticks this GP) idle=a49/1/0x4000000000000002 softirq=57618/57620 fqs=2100 
	(detected by 1, t=10505 jiffies, g=75081, q=645)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 22215 Comm: syz.0.4620 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:perf_callchain_store include/linux/perf_event.h:1319 [inline]
RIP: 0010:perf_callchain_kernel+0x387/0x760 arch/x86/events/core.c:2785
Code: 31 ff 48 89 c6 e8 39 39 78 00 4d 85 f6 0f 84 ba 02 00 00 4c 89 eb 43 0f b6 04 27 84 c0 0f 85 05 01 00 00 48 8b 04 24 44 8b 28 <48> 8b 44 24 38 42 0f b6 04 20 84 c0 0f 85 0c 01 00 00 48 8b 44 24
RSP: 0018:ffffc9000154eaa0 EFLAGS: 00000046
RAX: ffffc9000154ec2c RBX: ffffc9000154eb00 RCX: ffff88802812d940
RDX: 0000000000000000 RSI: ffffffff89e00e46 RDI: 0000000000000000
RBP: ffffc9000154ebd0 R08: ffffc9000154f338 R09: ffffc9000154eb50
R10: dffffc0000000000 R11: fffff520002a9d6c R12: dffffc0000000000
R13: 0000000000000002 R14: ffffffff89e00e46 R15: 1ffff920002a9d85
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd16ae71b70 CR3: 000000000ce8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000200000001780 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 get_perf_callchain+0x356/0x460 kernel/events/callchain.c:200
 perf_callchain kernel/events/core.c:7618 [inline]
 perf_prepare_sample+0x352/0x1cb0 kernel/events/core.c:7645
 __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_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:ffffc9000154f3e0 EFLAGS: 00000206
RAX: a6fbd7c08b5bda00 RBX: 1ffff920002a9e80 RCX: a6fbd7c08b5bda00
RDX: dffffc0000000000 RSI: ffffffff8a2b2b60 RDI: ffffffff8a7a5100
RBP: ffffc9000154f4b0 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
 get_signal+0x7eb/0x12e0 kernel/signal.c:2917
 arch_do_signal_or_restart+0xe6/0x12a0 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:157 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:217
 __syscall_exit_to_user_mode_work kernel/entry/common.c:299 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:310
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4c4650ab19
Code: Unable to access opcode bytes at RIP 0x7f4c4650aaef.
RSP: 002b:00007f4c446dd0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f4c46791368 RCX: 00007f4c4650ab19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f4c46791368
RBP: 00007f4c46791360 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4c467913f8 R14: 00007ffda5533e10 R15: 00007ffda5533ef8
 </TASK>