rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=35d/1/0x4000000000000000 softirq=34210/34210 fqs=0 
	(detected by 1, t=10502 jiffies, g=46093, q=163)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10284 Comm: syz.6.1109 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:172 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:227 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0xc/0x80 kernel/kcov.c:279
Code: 00 48 89 7c 11 10 48 89 74 11 18 4c 89 44 11 20 49 ff c2 4c 89 12 c3 0f 1f 80 00 00 00 00 4c 8b 04 24 65 48 8b 15 b4 f9 81 7e <65> 8b 05 b5 f9 81 7e 25 00 01 ff 00 74 10 3d 00 01 00 00 75 5b 83
RSP: 0018:ffffc90000007d58 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff888022789dc0
RDX: ffff888022789dc0 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000007ea8 R08: ffffffff816f77ab R09: fffffbfff1c14b16
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880b8e2a200
R13: ffff8880b8e2a200 R14: ffff888074e76340 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f84b4bc4378 CR3: 000000006a436000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 00000000fec000db DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __remove_hrtimer kernel/time/hrtimer.c:1114 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1668 [inline]
 __hrtimer_run_queues+0x3cb/0xcf0 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
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 e7 89 0c 48 89 de 5b e9 27 01 49 00 cc cc cc cc cc cc cc <48> 8b 04 24 65 48 8b 0d 14 fc 81 7e 65 8b 15 15 fc 81 7e 81 e2 00
RSP: 0018:ffffc900031bf418 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 800000005930f007 RCX: ffff888022789dc0
RDX: ffff888022789dc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900031bf650 R08: ffffffff81b88029 R09: ffffed10044f13b9
R10: 0000000000000000 R11: dffffc0000000001 R12: 00007f3d6785e000
R13: ffffea000164c3c0 R14: ffffea000164c3c8 R15: dffffc0000000000
 zap_pte_range mm/memory.c:1379 [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+0xdf5/0x2630 mm/memory.c:1576
 unmap_vmas+0x1f8/0x390 mm/memory.c:1653
 exit_mmap+0x3b6/0x670 mm/mmap.c:3186
 __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
 get_signal+0xc66/0x14e0 kernel/signal.c:2900
 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f3d68664d19
Code: Unable to access opcode bytes at RIP 0x7f3d68664cef.
RSP: 002b:00007f3d664d50e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f3d68854fa8 RCX: 00007f3d68664d19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f3d68854fac
RBP: 00007f3d68854fa0 R08: 0000000000000010 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3d68854fac
R13: 0000000000000000 R14: 00007fffd504d840 R15: 00007fffd504d928
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g46093 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=12833
rcu: rcu_preempt kthread starved for 10502 jiffies! g46093 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:27064 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
 schedule+0x11b/0x1f0 kernel/sched/core.c:6456
 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: 10284 Comm: syz.6.1109 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:timerqueue_del+0x44/0xf0 lib/timerqueue.c:55
Code: e8 71 f4 47 fd 4d 89 ec 49 c1 ec 03 41 80 3c 2c 00 74 08 4c 89 ef e8 9b cc 91 fd 49 8b 5d 00 48 89 df 4c 89 ee e8 2c f6 47 fd <4c> 39 eb 0f 84 95 00 00 00 e8 3e f4 47 fd 49 8d 5e 08 49 89 df 49
RSP: 0018:ffffc90000007d28 EFLAGS: 00000006
RAX: 0000000000010000 RBX: ffffffff96ad4360 RCX: ffff888022789dc0
RDX: 0000000000010000 RSI: ffff888074e76340 RDI: ffffffff96ad4360
RBP: dffffc0000000000 R08: ffffffff84387f54 R09: fffffbfff1c14b16
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100e9cec68
R13: ffff888074e76340 R14: ffff8880b8e2a350 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f84b4bc4378 CR3: 000000006a436000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 00000000fec000db DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __remove_hrtimer kernel/time/hrtimer.c:1117 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1668 [inline]
 __hrtimer_run_queues+0x3e9/0xcf0 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
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 e7 89 0c 48 89 de 5b e9 27 01 49 00 cc cc cc cc cc cc cc <48> 8b 04 24 65 48 8b 0d 14 fc 81 7e 65 8b 15 15 fc 81 7e 81 e2 00
RSP: 0018:ffffc900031bf418 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 800000005930f007 RCX: ffff888022789dc0
RDX: ffff888022789dc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900031bf650 R08: ffffffff81b88029 R09: ffffed10044f13b9
R10: 0000000000000000 R11: dffffc0000000001 R12: 00007f3d6785e000
R13: ffffea000164c3c0 R14: ffffea000164c3c8 R15: dffffc0000000000
 zap_pte_range mm/memory.c:1379 [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+0xdf5/0x2630 mm/memory.c:1576
 unmap_vmas+0x1f8/0x390 mm/memory.c:1653
 exit_mmap+0x3b6/0x670 mm/mmap.c:3186
 __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
 get_signal+0xc66/0x14e0 kernel/signal.c:2900
 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f3d68664d19
Code: Unable to access opcode bytes at RIP 0x7f3d68664cef.
RSP: 002b:00007f3d664d50e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f3d68854fa8 RCX: 00007f3d68664d19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f3d68854fac
RBP: 00007f3d68854fa0 R08: 0000000000000010 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3d68854fac
R13: 0000000000000000 R14: 00007fffd504d840 R15: 00007fffd504d928
 </TASK>