rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=f4f/1/0x4000000000000002 softirq=25773/25774 fqs=5247 
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P10537/1:b..l
	(detected by 1, t=10502 jiffies, g=34245, q=1016)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10560 Comm: syz.2.1711 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__perf_event_overflow+0x8e/0x530 kernel/events/core.c:9474
Code: f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 68 ce 25 00 4d 8b 36 31 ff 4c 89 f6 e8 6b b3 e0 ff 4d 85 f6 0f 84 a0 03 00 00 <48> 89 df 44 89 ee e8 b7 fc ff ff 41 89 c5 4c 8d b3 24 04 00 00 4c
RSP: 0018:ffffc9000327eec8 EFLAGS: 00000002
RAX: ffffffff81988505 RBX: ffff88802438f760 RCX: ffff88802afc3b80
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000000
RBP: ffff88802438fbd0 R08: ffff88802438fbd3 R09: 1ffff11004871f7a
R10: dffffc0000000000 R11: ffffed1004871f7b R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000007 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000281000 CR3: 000000000c08e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 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 32 e1 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:ffffc9000327f420 EFLAGS: 00000206
RAX: a861c94aa48f2f00 RBX: 1ffff9200064fe88 RCX: a861c94aa48f2f00
RDX: dffffc0000000000 RSI: ffffffff8a2b2800 RDI: ffffffff8a79fe00
RBP: ffffc9000327f4f0 R08: ffffffff901d50c7 R09: 1ffffffff203aa18
R10: dffffc0000000000 R11: fffffbfff203aa19 R12: ffffffff8c323000
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+0xf96/0x2500 mm/memory.c:1576
 unmap_vmas+0x131/0x250 mm/memory.c:1653
 exit_mmap+0x3b9/0x640 mm/mmap.c:3216
 __mmput+0x115/0x3b0 kernel/fork.c:1127
 exit_mm+0x588/0x6e0 kernel/exit.c:550
 do_exit+0x5a9/0x20c0 kernel/exit.c:870
 do_group_exit+0x12e/0x300 kernel/exit.c:997
 get_signal+0x6ca/0x12c0 kernel/signal.c:2900
 arch_do_signal_or_restart+0xe7/0x12c0 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd76894cdd9
Code: Unable to access opcode bytes at RIP 0x7fd76894cdaf.
RSP: 002b:00007fd766b85028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 0000000000000028 RBX: 00007fd768bc6090 RCX: 00007fd76894cdd9
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 00002000000003c0
RBP: 00007fd7689e2d69 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd768bc6128 R14: 00007fd768bc6090 R15: 00007ffe2f7afa58
 </TASK>
task:syz.4.1704      state:R  running task     stack:25072 pid:10537 ppid:  4202 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:check_kcov_mode kernel/kcov.c:172 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x13/0x60 kernel/kcov.c:206
Code: 48 8b 3d d0 bd 10 0c 48 89 de 5b e9 27 55 44 00 00 00 cc cc 00 00 cc 48 8b 04 24 65 48 8b 0d 24 3b 89 7e 65 8b 15 25 3b 89 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 34 16 00 00
RSP: 0018:ffffc9000302faf0 EFLAGS: 00000246
RAX: ffffffff818fe047 RBX: 00000000e05feb07 RCX: ffff888026613b80
RDX: 0000000080000000 RSI: 0000000000000005 RDI: ffff8881433f8f50
RBP: 0000000000000005 R08: dffffc0000000000 R09: 1ffffffff203aa18
R10: dffffc0000000000 R11: fffffbfff203aa19 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8881433f8f50 R15: 0000000000000005
 htab_map_hash+0x17/0x6d0 kernel/bpf/hashtab.c:583
 htab_map_update_elem+0x106/0xa40 kernel/bpf/hashtab.c:1055
 bpf_map_update_value+0x57d/0x650 kernel/bpf/syscall.c:223
 generic_map_update_batch+0x52d/0x7d0 kernel/bpf/syscall.c:1430
 bpf_map_do_batch+0x466/0x600 kernel/bpf/syscall.c:-1
 __sys_bpf+0x671/0x6f0 kernel/bpf/syscall.c:-1
 __do_sys_bpf kernel/bpf/syscall.c:4761 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4759 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759
 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: 0033:0x7f60c91cbdd9
RSP: 002b:00007f60c7425028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f60c9444fa0 RCX: 00007f60c91cbdd9
RDX: 0000000000000038 RSI: 0000200000000300 RDI: 000000000000001a
RBP: 00007f60c9261d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f60c9445038 R14: 00007f60c9444fa0 R15: 00007ffedb63e5b8
 </TASK>