rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (2 ticks this GP) idle=243c/1/0x4000000000000000 softirq=19330/19330 fqs=0
rcu: 	(detected by 1, t=10504 jiffies, g=13909, q=371 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6161 Comm: rm Not tainted 6.16.0-syzkaller-12084-g33caa208dba6 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0x44/0x3e0 kernel/locking/lockdep.c:5879
Code: 8b 05 10 84 02 11 48 89 44 24 28 0f 1f 44 00 00 65 8b 05 13 84 02 11 83 f8 08 0f 83 9a 02 00 00 89 c0 48 0f a3 05 fc d9 05 0e <73> 16 e8 45 f1 08 00 84 c0 75 0d f6 05 3e c3 ef 0d 01 0f 84 ad 02
RSP: 0018:ffffc90000007bf8 EFLAGS: 00000093
RAX: 0000000000000000 RBX: ffff88807ab322e8 RCX: 1ffff1100f566465
RDX: 0000000000010000 RSI: ffffffff8999dc6f RDI: ffff88807ab32300
RBP: ffff88805bbce950 R08: ffff88805bbce887 R09: 1ffff1100b779d10
R10: dffffc0000000000 R11: ffffed100b779d11 R12: ffff88807ab32340
R13: ffffffff8999dc6f R14: ffff88807ab32300 R15: ffff88805bbcdc00
FS:  0000000000000000(0000) GS:ffff888125c21000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc614179a10 CR3: 0000000073dcc000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
 _raw_spin_unlock+0x16/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 advance_sched+0x99f/0xc90 net/sched/sch_taprio.c:986
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x18/0x70 kernel/kcov.c:217
Code: cc cc 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 0c 25 08 f0 9f 92 65 8b 15 68 44 e0 10 <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00
RSP: 0018:ffffc90003557438 EFLAGS: 00000246
RAX: ffffffff8b719c7b RBX: ffff88801a476bc0 RCX: ffff888025a61e00
RDX: 0000000080000000 RSI: ffffffff8f8a18a0 RDI: 0000000000000001
RBP: ffffc90003557610 R08: ffff888025a61e00 R09: 0000000000000003
R10: 0000000000000003 R11: 0000000000000000 R12: ffff888032106ec0
R13: dffffc0000000000 R14: ffff888074de6e00 R15: 0000000000000001
 mas_data_end lib/maple_tree.c:1461 [inline]
 mt_validate_nulls lib/maple_tree.c:7567 [inline]
 mt_validate+0x3efb/0x4380 lib/maple_tree.c:7615
 validate_mm+0xb6/0x4b0 mm/vma.c:651
 mmap_region+0x15a5/0x20c0 mm/vma.c:2745
 do_mmap+0xc45/0x10d0 mm/mmap.c:558
 vm_mmap_pgoff+0x2a6/0x4d0 mm/util.c:580
 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:604
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc6144a6242
Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00
RSP: 002b:00007ffc3365df38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fc614171000 RCX: 00007fc6144a6242
RDX: 0000000000000003 RSI: 0000000000002000 RDI: 00007fc614171000
RBP: 0000000000000812 R08: 0000000000000003 R09: 000000000005f000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffc3365dff8
R13: 00007fc61417d6b0 R14: 00007ffc3365e370 R15: 00000fff866cbbea
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10503 jiffies! g13909 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=6249
rcu: rcu_preempt kthread starved for 10504 jiffies! g13909 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:27160 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 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+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>