rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4312/1:b..l
	(detected by 0, t=10503 jiffies, g=7765, q=77 ncpus=2)
task:syz-executor607 state:R  running task     stack:27536 pid:4312  ppid:4289   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:check_region_inline mm/kasan/generic.c:172 [inline]
RIP: 0010:kasan_check_range+0x16/0x290 mm/kasan/generic.c:189
Code: 0f 0b b8 ea ff ff ff c3 00 00 cc cc 00 00 cc cc 00 00 cc cc b0 01 48 85 f6 0f 84 ac 01 00 00 55 41 57 41 56 41 54 53 49 89 f8 <49> 01 f0 0f 82 0e 02 00 00 49 89 f8 49 c1 e8 2f 41 81 f8 ff ff 01
RSP: 0018:ffffc900040379c8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff88801bcccdd8 RCX: ffffffff81dc05dc
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88801bcccdb0
RBP: 000000000000000f R08: ffff88801bcccdb0 R09: ffffffff8fa09058
R10: ffffffff8fa09050 R11: ffffffff8fa09043 R12: 0000000000000010
R13: dffffc0000000000 R14: ffff888024fc2670 R15: ffff88801bcccdb0
 instrument_write include/linux/instrumented.h:42 [inline]
 ___set_bit include/asm-generic/bitops/instrumented-non-atomic.h:28 [inline]
 __set_page_owner_handle+0x23c/0x3c0 mm/page_owner.c:177
 __set_page_owner+0x41/0x60 mm/page_owner.c:195
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2559
 prep_new_page mm/page_alloc.c:2566 [inline]
 get_page_from_freelist+0x1a1e/0x1ab0 mm/page_alloc.c:4357
 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5643
 alloc_slab_page+0x5d/0x160 mm/slub.c:1799
 allocate_slab mm/slub.c:1944 [inline]
 new_slab+0x87/0x2c0 mm/slub.c:1997
 ___slab_alloc+0xbc6/0x1240 mm/slub.c:3154
 __slab_alloc mm/slub.c:3240 [inline]
 slab_alloc_node mm/slub.c:3325 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc+0x1b7/0x2f0 mm/slub.c:3383
 getname_flags+0xb7/0x500 fs/namei.c:139
 getname fs/namei.c:218 [inline]
 __do_sys_symlink fs/namei.c:4530 [inline]
 __se_sys_symlink fs/namei.c:4528 [inline]
 __x64_sys_symlink+0x5b/0x90 fs/namei.c:4528
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f94abcea787
RSP: 002b:00007ffd5bee6648 EFLAGS: 00000206 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f94abcea787
RDX: 0000000000000000 RSI: 00007f94abd67051 RDI: 00007f94abd6705c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007f94abd690b2
R13: 00007f94abd6712a R14: 00007ffd5bee6680 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10537 jiffies! g7765 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27760 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
 schedule+0xb9/0x180 kernel/sched/core.c:6638
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x303/0x1340 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 4310 Comm: syz-executor607 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 00 00 00 66 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 9e 12 2e f7 48 89 df e8 e6 da 2e f7 e8 a1 2d 52 f7 fb bf 01 00 00 00 <e8> 86 3b 22 f7 65 8b 05 47 c0 cb 75 85 c0 74 02 5b c3 e8 94 d4 c9
RSP: 0018:ffffc90003f57b98 EFLAGS: 00000282
RAX: 54613c22f1552000 RBX: ffff88802d8ac0c0 RCX: 54613c22f1552000
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: 0000000000000001
RBP: ffff88802d8ac558 R08: ffff88802d8ac0c3 R09: 1ffff11005b15818
R10: dffffc0000000000 R11: ffffed1005b15819 R12: 1ffff11005b158ab
R13: 0000000000000021 R14: dffffc0000000000 R15: 0000000000000000
FS:  000055556c4c33c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f94abd9d800 CR3: 0000000075fe4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x1163/0x1350 kernel/signal.c:2874
 arch_do_signal_or_restart+0xc4/0x1350 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f94abcd46a0
Code: 18 e8 84 d7 00 00 48 89 5d 08 48 85 db 75 eb 48 83 c4 08 5b 5d c3 e8 4f ff ff ff eb d0 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <f3> 0f 1e fa 48 83 ec 08 48 8d 3d 61 e6 0c 00 e8 9c ff ff ff 48 8d
RSP: 002b:00007ffd5bee65b8 EFLAGS: 00000202
RAX: 00007f94abd96470 RBX: 0000000000000002 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f94abd96468 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f94abd9b128 R14: 00007f94abd9d3c8 R15: 00007f94abd9d3e0
 </TASK>