rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=603/1/0x4000000000000002 softirq=10276/10276 fqs=0 
	(detected by 1, t=10502 jiffies, g=11881, q=559)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5012 Comm: syz.0.27 Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x32/0x60 kernel/kcov.c:206
Code: d4 d1 81 7e 65 8b 15 d5 d1 81 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 34 16 00 00 00 74 2c 8b 91 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
RSP: 0018:ffffc90002cfee08 EFLAGS: 00000046
RAX: ffffffff81a15a92 RBX: 0000000000000000 RCX: ffff88801ed9d940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff81a15a82 R09: fffffbfff2132019
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff88802c054d98 R14: ffffc90002cff1c0 R15: ffffc90002cff006
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __perf_event_header__init_id+0x392/0x510 kernel/events/core.c:7094
 perf_prepare_sample+0x165/0x1d00 kernel/events/core.c:7600
 __perf_event_output kernel/events/core.c:7778 [inline]
 perf_event_output_forward+0x199/0x310 kernel/events/core.c:7798
 __perf_event_overflow+0x35d/0x530 kernel/events/core.c:9491
 perf_swevent_overflow kernel/events/core.c:9567 [inline]
 perf_swevent_event+0x4c5/0x550 kernel/events/core.c:9605
 perf_tp_event+0x363/0xc40 kernel/events/core.c:10023
 perf_trace_run_bpf_submit+0xf7/0x1d0 kernel/events/core.c:9997
 perf_trace_preemptirq_template+0x31d/0x430 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x10e/0x190 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+0x84/0x520 kernel/rcu/tree_plugin.h:671
Code: f1 f1 f1 00 f2 f2 f2 49 89 04 17 66 41 c7 44 17 09 f3 f3 41 c6 44 17 0b f3 65 44 8b 25 6d 6d 96 7e 41 f7 c4 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 3a 00 00 00 00 66 42 c7 44 3a
RSP: 0018:ffffc90002cff600 EFLAGS: 00000206
RAX: dcf03da69e311200 RBX: 1ffff9200059fec8 RCX: ffffffff816352a8
RDX: dffffc0000000000 RSI: ffffffff8aab2b60 RDI: ffffffff8af9fc80
RBP: ffffc90002cff6d8 R08: dffffc0000000000 R09: fffffbfff2132019
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8cb23500
R13: ffff88801ed9dd98 R14: ffffc90002cff640 R15: 1ffff9200059fec4
 __rcu_read_unlock+0x92/0x100 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:771 [inline]
 __unlock_page_memcg+0xfd/0x110 mm/memcontrol.c:2095
 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+0xffa/0x2630 mm/memory.c:1576
 unmap_vmas+0x1f8/0x390 mm/memory.c:1653
 exit_mmap+0x3b6/0x620 mm/mmap.c:3204
 __mmput+0x112/0x3b0 kernel/fork.c:1127
 exit_mm+0x688/0x7f0 kernel/exit.c:550
 do_exit+0x626/0x2480 kernel/exit.c:861
 do_group_exit+0x144/0x310 kernel/exit.c:996
 __do_sys_exit_group kernel/exit.c:1007 [inline]
 __se_sys_exit_group kernel/exit.c:1005 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1005
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f65e8e36d29
Code: Unable to access opcode bytes at RIP 0x7f65e8e36cff.
RSP: 002b:00007ffd0aa28388 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f65e8e36d29
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffd0aa283dc R08: 00007ffd0aa2846f R09: 000000000001d0d8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000032
R13: 000000000001d0d8 R14: 00007ffd0aa28430 R15: 00007ffd0aa28430
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g11881 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=3894
rcu: rcu_preempt kthread starved for 10502 jiffies! g11881 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:27352 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1f0 kernel/sched/core.c:6459
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5012 Comm: syz.0.27 Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:202
Code: 1f 84 00 00 00 00 00 0f 1f 00 53 48 89 fb e8 17 00 00 00 48 8b 3d 48 0b 8a 0c 48 89 de 5b e9 77 1c 49 00 cc cc cc cc cc cc cc <48> 8b 04 24 65 48 8b 0d d4 d1 81 7e 65 8b 15 d5 d1 81 7e 81 e2 00
RSP: 0018:ffffc90002cff078 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88801ed9d940
RDX: ffff88801ed9d940 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88802c056f94 R08: ffffffff81a23e51 R09: ffffed100580adfd
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88802c056b70 R14: ffff88802c056fe0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __perf_event_overflow+0x17e/0x530 kernel/events/core.c:9458
 perf_swevent_overflow kernel/events/core.c:9567 [inline]
 perf_swevent_event+0x4c5/0x550 kernel/events/core.c:9605
 perf_tp_event+0x363/0xc40 kernel/events/core.c:10023
 perf_trace_run_bpf_submit+0xf7/0x1d0 kernel/events/core.c:9997
 perf_trace_preemptirq_template+0x31d/0x430 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x10e/0x190 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+0x84/0x520 kernel/rcu/tree_plugin.h:671
Code: f1 f1 f1 00 f2 f2 f2 49 89 04 17 66 41 c7 44 17 09 f3 f3 41 c6 44 17 0b f3 65 44 8b 25 6d 6d 96 7e 41 f7 c4 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 3a 00 00 00 00 66 42 c7 44 3a
RSP: 0018:ffffc90002cff600 EFLAGS: 00000206
RAX: dcf03da69e311200 RBX: 1ffff9200059fec8 RCX: ffffffff816352a8
RDX: dffffc0000000000 RSI: ffffffff8aab2b60 RDI: ffffffff8af9fc80
RBP: ffffc90002cff6d8 R08: dffffc0000000000 R09: fffffbfff2132019
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8cb23500
R13: ffff88801ed9dd98 R14: ffffc90002cff640 R15: 1ffff9200059fec4
 __rcu_read_unlock+0x92/0x100 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:771 [inline]
 __unlock_page_memcg+0xfd/0x110 mm/memcontrol.c:2095
 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+0xffa/0x2630 mm/memory.c:1576
 unmap_vmas+0x1f8/0x390 mm/memory.c:1653
 exit_mmap+0x3b6/0x620 mm/mmap.c:3204
 __mmput+0x112/0x3b0 kernel/fork.c:1127
 exit_mm+0x688/0x7f0 kernel/exit.c:550
 do_exit+0x626/0x2480 kernel/exit.c:861
 do_group_exit+0x144/0x310 kernel/exit.c:996
 __do_sys_exit_group kernel/exit.c:1007 [inline]
 __se_sys_exit_group kernel/exit.c:1005 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1005
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f65e8e36d29
Code: Unable to access opcode bytes at RIP 0x7f65e8e36cff.
RSP: 002b:00007ffd0aa28388 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f65e8e36d29
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffd0aa283dc R08: 00007ffd0aa2846f R09: 000000000001d0d8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000032
R13: 000000000001d0d8 R14: 00007ffd0aa28430 R15: 00007ffd0aa28430
 </TASK>