rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7187/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=18105, q=354 ncpus=2)
task:syz.1.313       state:R  running task     stack:26584 pid:7187  tgid:7187  ppid:5801   task_flags:0x400040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5260 [inline]
 __schedule+0xfe6/0x5fa0 kernel/sched/core.c:6867
 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7194
 irqentry_exit+0x17b/0x670 kernel/entry/common.c:216
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:839 [inline]
RIP: 0010:__task_pid_nr_ns+0x222/0x500 kernel/pid.c:554
Code: 13 00 e8 61 06 1d 00 89 e8 5b 5d 41 5c 41 5d c3 cc cc cc cc e8 df 79 37 00 49 81 c4 58 06 00 00 e9 a2 fe ff ff e8 ce 79 37 00 <e8> 39 0f 1c 00 31 ff 89 c5 89 c6 e8 0e 74 37 00 40 84 ed 0f 85 1d
RSP: 0018:ffffc90003b2fee0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81cf85ff
RDX: ffff888027344900 RSI: ffffffff81cf87d2 RDI: ffff888027344900
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888027344900
R13: 0000000000000000 R14: 0000000000000027 R15: 0000000000000000
 task_tgid_vnr include/linux/pid.h:298 [inline]
 __do_sys_getpid+0x1d/0x30 kernel/sys.c:1001
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9212594d97
RSP: 002b:00007ffd3d7fbd48 EFLAGS: 00000206 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00007ffd3d7fbeb0 RCX: 00007f9212594d97
RDX: 00007ffd3d7fbd80 RSI: 00007ffd3d7fbeb0 RDI: 0000000000000021
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f9212816038
R10: 0000000000000003 R11: 0000000000000206 R12: 00007f9212815fa0
R13: 0000200000000000 R14: 00007ffd3d7fcb28 R15: 0000000000000003
 </TASK>
rcu: rcu_preempt kthread starved for 10478 jiffies! g18105 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:28952 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5260 [inline]
 __schedule+0xfe6/0x5fa0 kernel/sched/core.c:6867
 __schedule_loop kernel/sched/core.c:6949 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:6964
 schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
 kthread+0x3b3/0x730 kernel/kthread.c:463
 ret_from_fork+0x754/0xaf0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82
Code: a6 75 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 03 3a 11 00 fb f4 <e9> 7c 33 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000197df0 EFLAGS: 00000246
RAX: 00000000019e40bd RBX: ffff88801e2c2480 RCX: ffffffff8b7a44b5
RDX: 0000000000000000 RSI: ffffffff8dc4fd13 RDI: ffffffff8bfa9ca0
RBP: 0000000000000001 R08: 0000000000000001 R09: ffffed10170a6745
R10: ffff8880b8533a2b R11: 0000000000000000 R12: ffffed1003c58490
R13: 0000000000000001 R14: ffffffff90b812d0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881246bd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f5f5ff8 CR3: 000000000e392000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x9/0x10 arch/x86/kernel/process.c:767
 default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x35b/0x4b0 kernel/sched/idle.c:332
 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
 start_secondary+0x21d/0x2d0 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x148
 </TASK>