rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6191/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=17377, q=554 ncpus=2)
task:udevd           state:R  running task     stack:24280 pid:6191  tgid:6191  ppid:5193   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5258 [inline]
 __schedule+0x14ed/0x5040 kernel/sched/core.c:6866
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7193
 irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_release+0x80/0x3b0 kernel/locking/lockdep.c:5881
Code: 52 04 0e 00 0f 84 1d 02 00 00 65 8b 05 29 68 03 11 85 c0 0f 85 0e 02 00 00 65 4c 8b 3c 25 08 40 a1 92 41 83 bf 04 0b 00 00 00 <0f> 85 f7 01 00 00 49 81 3e e0 03 65 93 0f 84 ea 01 00 00 9c 5b fa
RSP: 0018:ffffc9000b7cf7d0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000562109f7b801 RCX: 0000000080000001
RDX: ffffffff902d2300 RSI: ffffffff8be082c0 RDI: ffffffff8be08280
RBP: dffffc0000000000 R08: 0000000000000022 R09: ffffffff8e13f2e0
R10: ffffc9000b7cf958 R11: ffffffff81acaae0 R12: 00007ffc0797a8e8
R13: ffffffff8173fd85 R14: ffffffff8e13f2e0 R15: ffff88807aac3c80
 rcu_lock_release include/linux/rcupdate.h:312 [inline]
 rcu_read_unlock include/linux/rcupdate.h:868 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1166 [inline]
 unwind_next_frame+0x1ab1/0x23d0 arch/x86/kernel/unwind_orc.c:695
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2540 [inline]
 slab_free mm/slub.c:6674 [inline]
 kmem_cache_free+0x197/0x620 mm/slub.c:6785
 do_renameat2+0x8e0/0x950 fs/namei.c:6136
 __do_sys_rename fs/namei.c:6156 [inline]
 __se_sys_rename fs/namei.c:6154 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:6154
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1b7707acc7
RSP: 002b:00007ffc0797a8e8 EFLAGS: 00000202 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 0000562109f935d0 RCX: 00007f1b7707acc7
RDX: 0000562109f66010 RSI: 00007ffc0797a900 RDI: 00007ffc0797ad00
RBP: 0000562109f7b830 R08: 00000000000001e0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc0797a900
R13: 00007ffc0797ad00 R14: 0000000000000000 R15: 0000562109f675f0
 </TASK>
rcu: rcu_preempt kthread starved for 10348 jiffies! g17377 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:28080 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5258 [inline]
 __schedule+0x14ed/0x5040 kernel/sched/core.c:6866
 __schedule_loop kernel/sched/core.c:6948 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6963
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x11b0 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x9b/0x2d0 kernel/rcu/tree.c:2297
 kthread+0x389/0x480 kernel/kthread.c:467
 ret_from_fork+0x510/0xa50 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 10/25/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: cc cc cc cc cc cc cc 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 63 7e 2b 00 f3 0f 1e fa fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197e20 EFLAGS: 000002c2
RAX: 0000000000568f79 RBX: ffffffff81970ece RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8d99cad6 RDI: ffffffff8be082e0
RBP: ffffc90000197f10 R08: ffff8880b873375b R09: 1ffff110170e66eb
R10: dffffc0000000000 R11: ffffed10170e66ec R12: ffffffff8fa23f70
R13: 1ffff11003b50b58 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125d0c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007eff6a007960 CR3: 00000000792b2000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x1be/0x4d0 kernel/sched/idle.c:332
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:430
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x147
 </TASK>