rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=dedc/1/0x4000000000000000 softirq=35906/46073 fqs=0
rcu: 	(t=10500 jiffies g=30561 q=476 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g30561 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=24590
rcu: rcu_preempt kthread starved for 10500 jiffies! g30561 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:27576 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5392 [inline]
 __schedule+0x116a/0x5de0 kernel/sched/core.c:6781
 __schedule_loop kernel/sched/core.c:6859 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6874
 schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1ea/0xb00 kernel/rcu/tree.c:2054
 rcu_gp_kthread+0x270/0x380 kernel/rcu/tree.c:2256
 kthread+0x3c2/0x780 kernel/kthread.c:464
 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5819 Comm: syz-executor Not tainted 6.15.0-syzkaller-07774-g90b83efa6701 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: e9 bd 90 5b 00 be 03 00 00 00 5b e9 a2 2f 1d 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 34 24 <65> 48 8b 15 98 47 ef 11 65 8b 05 a9 47 ef 11 a9 00 01 ff 00 74 1d
RSP: 0018:ffffc90000007e00 EFLAGS: 00000097
RAX: 0000000000010002 RBX: ffff888040321340 RCX: ffffffff81a84477
RDX: ffff88805fab0000 RSI: ffffffff81a84485 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 000000000000001f
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880b8427c40 R15: 0000000000000000
FS:  000055556d577500(0000) GS:ffff888124974000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f55be3b7bac CR3: 000000005f9c8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __remove_hrtimer+0xf5/0x290 kernel/time/hrtimer.c:1122
 __run_hrtimer kernel/time/hrtimer.c:1741 [inline]
 __hrtimer_run_queues+0x4f9/0xad0 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x3f0 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0x9f/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:finish_task_switch.isra.0+0x22a/0xc10 kernel/sched/core.c:5260
Code: fb 09 00 00 44 8b 05 09 26 fe 0e 45 85 c0 0f 85 be 01 00 00 4c 89 e7 e8 a4 f6 ff ff e8 1f d2 39 00 fb 65 48 8b 1d be 51 21 12 <48> 8d bb 18 16 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc9000529fa38 EFLAGS: 00000206
RAX: 0000000000156bc9 RBX: ffff88805fab0000 RCX: ffffffff81c33f6f
RDX: 0000000000000000 RSI: ffffffff8dc0416f RDI: ffffffff8bf52e00
RBP: ffffc9000529fa80 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90876257 R11: 0000000000000001 R12: ffff8880b843bd00
R13: ffff8880273ca440 R14: 0000000000000001 R15: ffff8880b843cb70
 context_switch kernel/sched/core.c:5395 [inline]
 __schedule+0x1172/0x5de0 kernel/sched/core.c:6781
 __schedule_loop kernel/sched/core.c:6859 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6874
 do_nanosleep+0x21a/0x570 kernel/time/hrtimer.c:2100
 hrtimer_nanosleep+0x155/0x380 kernel/time/hrtimer.c:2147
 common_nsleep+0xa1/0xd0 kernel/time/posix-timers.c:1353
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1399 [inline]
 __se_sys_clock_nanosleep kernel/time/posix-timers.c:1376 [inline]
 __x64_sys_clock_nanosleep+0x34d/0x4a0 kernel/time/posix-timers.c:1376
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe6025c1225
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f 55 ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffc13d7d6d0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000210 RCX: 00007fe6025c1225
RDX: 00007ffc13d7d710 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffc13d7d77c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000001388
R13: 00000000000927c0 R14: 00000000000500cf R15: 00007ffc13d7d7d0
 </TASK>
CPU: 1 UID: 0 PID: 11470 Comm: syz.2.733 Not tainted 6.15.0-syzkaller-07774-g90b83efa6701 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0xd0f/0x1490 kernel/smp.c:885
Code: 00 45 85 ed 74 46 48 8b 14 24 49 89 d6 49 89 d5 49 c1 ee 03 41 83 e5 07 4d 01 e6 41 83 c5 03 e8 27 17 0c 00 f3 90 41 0f b6 06 <41> 38 c5 7c 08 84 c0 0f 85 6f 05 00 00 8b 43 08 31 ff 83 e0 01 89
RSP: 0018:ffffc900046d7b68 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880b84439c0 RCX: ffffc9000d063000
RDX: 0000000000080000 RSI: ffffffff81af6149 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000003 R14: ffffed1017088739 R15: ffff8880b853cfc0
FS:  00007f17c1d696c0(0000) GS:ffff888124a74000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2eae5c CR3: 00000000328f7000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 clock_was_set+0x642/0x870 kernel/time/hrtimer.c:976
 do_settimeofday64+0x323/0x4d0 kernel/time/timekeeping.c:1407
 do_sys_settimeofday64+0x1dc/0x260 kernel/time/time.c:195
 __do_sys_clock_settime kernel/time/posix-timers.c:1132 [inline]
 __se_sys_clock_settime kernel/time/posix-timers.c:1116 [inline]
 __x64_sys_clock_settime+0x1c1/0x2a0 kernel/time/posix-timers.c:1116
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f17c0f8e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f17c1d69038 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007f17c11b6080 RCX: 00007f17c0f8e969
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000000
RBP: 00007f17c1010ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f17c11b6080 R15: 00007fffa5f8a758
 </TASK>