rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (3 ticks this GP) idle=a8a4/1/0x4000000000000000 softirq=16885/16885 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=10961, q=1247 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6168 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x18/0x90 kernel/kcov.c:300
Code: 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 14 25 08 50 6e 92 65 8b 0d 48 49 ae 10 <81> e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba 7c 16 00 00
RSP: 0018:ffffc90000a08d38 EFLAGS: 00000046
RAX: ffffffff81ada6e4 RBX: ffff8880b8927c08 RCX: 0000000000010001
RDX: ffff88802414bc80 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000a08e90 R08: ffffffff8f7ce877 R09: 1ffffffff1ef9d0e
R10: dffffc0000000000 R11: fffffbfff1ef9d0f R12: ffff888033549340
R13: dffffc0000000000 R14: ffff8880b8927ac0 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88812623b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b4560b1138 CR3: 000000000dd38000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __remove_hrtimer kernel/time/hrtimer.c:1111 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1757 [inline]
 __hrtimer_run_queues+0x344/0xc60 kernel/time/hrtimer.c:1841
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1058
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1052
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:mas_next_slot+0x8a3/0xcf0 lib/maple_tree.c:4406
Code: 8d 75 08 eb 0c e8 3d 5b 81 f6 4d 8d b5 80 00 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 c0 1c e7 f6 49 8b 1f <48> 8b 44 24 48 42 0f b6 04 20 84 c0 0f 85 29 03 00 00 48 8b 44 24
RSP: 0018:ffffc9000482f900 EFLAGS: 00000246
RAX: 1ffff92000905f68 RBX: ffff88807a1f5640 RCX: ffff88802414bc80
RDX: 0000000000000000 RSI: ffffffff8f63d760 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffff88802414bc80 R09: 0000000000000004
R10: 0000000000000003 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888072866000 R14: ffff888072866080 R15: ffffc9000482fb40
 mas_find+0xb0e/0xd30 lib/maple_tree.c:5622
 vma_next include/linux/mm.h:931 [inline]
 exit_mmap+0x563/0xb40 mm/mmap.c:1308
 __mmput+0x118/0x430 kernel/fork.c:1133
 exit_mm+0x1da/0x2c0 kernel/exit.c:582
 do_exit+0x648/0x2300 kernel/exit.c:954
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
 __do_sys_exit_group kernel/exit.c:1118 [inline]
 __se_sys_exit_group kernel/exit.c:1116 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1116
 x64_sys_call+0x21f7/0x2200 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f578575b6c5
Code: Unable to access opcode bytes at 0x7f578575b69b.
RSP: 002b:00007ffd341817f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000055b45609b910 RCX: 00007f578575b6c5
RDX: 00000000000000e7 RSI: ffffffffffffff88 RDI: 0000000000000000
RBP: 00007ffd34181b28 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd34181b20
R13: 00007ffd34181b30 R14: 00007f578596b000 R15: 000055b455038d98
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g10961 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=4362
rcu: rcu_preempt kthread starved for 10502 jiffies! g10961 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
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:27224 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7026
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>