rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (2 ticks this GP) idle=ef84/1/0x4000000000000000 softirq=28054/28054 fqs=0
rcu: 	(detected by 1, t=10502 jiffies, g=24589, q=665 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9294 Comm: syz-executor Not tainted 6.14.0-rc7-syzkaller-01431-gbfc17c165835 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:kasan_check_range+0x1b8/0x290 mm/kasan/generic.c:189
Code: 4d 01 fb 48 8d 5d 07 48 85 ed 48 0f 49 dd 48 83 e3 f8 48 29 dd 74 12 41 80 3b 00 0f 85 a6 00 00 00 49 ff c3 48 ff cd 75 ee 5b <41> 5c 41 5e 41 5f 5d c3 cc cc cc cc 40 84 ed 75 5f f7 c5 00 ff 00
RSP: 0018:ffffc900000079d8 EFLAGS: 00000056
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff819d0b90
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff903d2270
RBP: 0000000000000000 R08: ffffffff903d2277 R09: 1ffffffff207a44e
R10: dffffc0000000000 R11: fffffbfff207a44f R12: 1ffff92000000f4c
R13: ffffffff84fcbd87 R14: dffffc0000000001 R15: fffffbfff207a44f
FS:  000055556b790500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe5bc8d8740 CR3: 0000000034c36000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 cpumask_test_cpu include/linux/cpumask.h:570 [inline]
 cpu_online include/linux/cpumask.h:1116 [inline]
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0xb0/0xa30 kernel/locking/lockdep.c:5862
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
 _raw_spin_unlock_irqrestore+0x79/0x140 kernel/locking/spinlock.c:194
 debug_object_activate+0x3f7/0x580 lib/debugobjects.c:836
 debug_hrtimer_activate kernel/time/hrtimer.c:455 [inline]
 debug_activate kernel/time/hrtimer.c:496 [inline]
 enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1100
 __run_hrtimer kernel/time/hrtimer.c:1818 [inline]
 __hrtimer_run_queues+0x6cb/0xd30 kernel/time/hrtimer.c:1865
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:stack_trace_consume_entry+0xe3/0x280 kernel/stacktrace.c:93
Code: 7b 00 4d 89 f0 4c 8b 0c 24 4c 89 ee 48 ba 00 00 00 00 00 fc ff df 48 8b 1b 45 8d 70 01 41 0f b6 04 17 84 c0 0f 85 31 01 00 00 <45> 89 31 4a 8d 1c c3 48 89 d8 48 c1 e8 03 80 3c 10 00 74 1a 4d 89
RSP: 0018:ffffc9000432f2b0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc9000432f480 RCX: ffffffff919e8000
RDX: dffffc0000000000 RSI: ffffffff823ddcd9 RDI: ffffc9000432f3ec
RBP: ffffc9000432f3e8 R08: 000000000000000f R09: ffffc9000432f3f0
R10: ffffc9000432f350 R11: ffffffff81ad7cb0 R12: 1ffff92000865e7d
R13: 1ffff92000865e7d R14: 0000000000000010 R15: 1ffff92000865e7e
 arch_stack_walk+0x10e/0x150 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171
 lsm_inode_alloc security/security.c:755 [inline]
 security_inode_alloc+0x37/0x310 security/security.c:1697
 inode_init_always_gfp+0xa0f/0xd90 fs/inode.c:306
 inode_init_always include/linux/fs.h:3220 [inline]
 alloc_inode+0x9f/0x1a0 fs/inode.c:343
 new_inode_pseudo fs/inode.c:1174 [inline]
 new_inode+0x22/0x1d0 fs/inode.c:1193
 proc_pid_make_inode+0x1f/0x130 fs/proc/base.c:1950
 proc_pid_make_base_inode fs/proc/base.c:2001 [inline]
 proc_pid_instantiate+0x54/0x2b0 fs/proc/base.c:3499
 proc_pid_lookup+0x31f/0x480 fs/proc/base.c:3543
 proc_root_lookup+0x1f/0x50 fs/proc/root.c:325
 __lookup_slow+0x296/0x400 fs/namei.c:1793
 lookup_slow+0x53/0x70 fs/namei.c:1810
 walk_component+0x2e1/0x410 fs/namei.c:2114
 link_path_walk+0x797/0xea0 fs/namei.c:2476
 path_lookupat+0xa9/0x450 fs/namei.c:2635
 filename_lookup+0x2a3/0x670 fs/namei.c:2665
 do_readlinkat+0xf0/0x3a0 fs/stat.c:564
 __do_sys_readlink fs/stat.c:601 [inline]
 __se_sys_readlink fs/stat.c:598 [inline]
 __x64_sys_readlink+0x7f/0x90 fs/stat.c:598
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe5bbba1e96
Code: 00 00 66 90 41 55 ba 00 10 00 00 b8 59 00 00 00 48 8d 3d 35 9e 09 00 41 54 55 53 48 81 ec 08 10 00 00 48 89 e5 48 89 ee 0f 05 <3d> 00 f0 ff ff 77 5b 85 c0 7e 57 0f b6 14 24 80 fa 5b 74 4e 80 fa
RSP: 002b:00007ffdd3bc7ba0 EFLAGS: 00000206 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fe5bbba1e96
RDX: 0000000000001000 RSI: 00007ffdd3bc7ba0 RDI: 00007fe5bbc3bcb8
RBP: 00007ffdd3bc7ba0 R08: 0000000000000000 R09: 00007fe5bbc3c354
R10: 00007ffdd3bc8c30 R11: 0000000000000206 R12: 00007ffdd3bc8d80
R13: 00007ffdd3bc8d68 R14: 00007ffdd3bc8d00 R15: 00007ffdd3bc8cf8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g24589 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=8458
rcu: rcu_preempt kthread starved for 10502 jiffies! g24589 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:25784 pid:18    tgid:18    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5378 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6765
 __schedule_loop kernel/sched/core.c:6842 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6857
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>