rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=0dc4/1/0x4000000000000000 softirq=23130/23131 fqs=8
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8364/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=30509, q=245 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7668 Comm: syz-executor.4 Not tainted 6.9.0-next-20240515-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:debug_object_deactivate+0x115/0x390 lib/debugobjects.c:758
Code: c1 33 44 fd 4c 89 6c 24 58 49 8d 7c 24 20 48 89 f8 48 c1 e8 03 42 80 3c 30 00 74 05 e8 a4 33 44 fd 48 8b 04 24 48 89 44 24 60 <80> 3d b8 9b f5 0a 00 0f 85 52 01 00 00 4c 89 e8 48 c1 e8 0c 48 b9
RSP: 0018:ffffc90000a18c40 EFLAGS: 00000046
RAX: ffffffff8bccb9c0 RBX: ffffc90000a18c90 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90000a18ca0
RBP: ffffc90000a18d30 R08: ffffc90000a18c8f R09: 0000000000000000
R10: ffffc90000a18c80 R11: fffff52000143192 R12: ffffc90000a18c80
R13: ffff88801bedb340 R14: dffffc0000000000 R15: 1ffff9200014318c
FS: 000055558bf63480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2584468000 CR3: 000000006802c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
debug_hrtimer_deactivate kernel/time/hrtimer.c:428 [inline]
debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:484
__run_hrtimer kernel/time/hrtimer.c:1655 [inline]
__hrtimer_run_queues+0x30f/0xd50 kernel/time/hrtimer.c:1751
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1813
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 9e 0a 66 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 f3 c9 cf f5 65 8b 05 64 d9 6d 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc9001390f8c0 EFLAGS: 00000206
RAX: 7cc096612efd4000 RBX: 1ffff92002721f1c RCX: ffffffff81730d7a
RDX: dffffc0000000000 RSI: ffffffff8bcab960 RDI: 0000000000000001
RBP: ffffc9001390f958 R08: ffffffff92fb561f R09: 1ffffffff25f6ac3
R10: dffffc0000000000 R11: fffffbfff25f6ac4 R12: dffffc0000000000
R13: 1ffff92002721f18 R14: ffffc9001390f8e0 R15: 0000000000000246
rcu_report_qs_rsp+0xad/0x1b0 kernel/rcu/tree.c:2226
rcu_report_unblock_qs_rnp kernel/rcu/tree.c:2331 [inline]
rcu_preempt_deferred_qs_irqrestore+0x9f8/0xc70 kernel/rcu/tree_plugin.h:557
rcu_read_unlock_special+0x470/0x550 kernel/rcu/tree_plugin.h:681
__rcu_read_unlock+0xa1/0x110 kernel/rcu/tree_plugin.h:426
shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1075
shrink_dcache_parent+0xcb/0x3b0
vfs_rmdir+0x3e6/0x510 fs/namei.c:4218
do_rmdir+0x3b5/0x580 fs/namei.c:4273
__do_sys_unlinkat fs/namei.c:4449 [inline]
__se_sys_unlinkat fs/namei.c:4443 [inline]
__x64_sys_unlinkat+0xe0/0xf0 fs/namei.c:4443
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb64d07c6c7
Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 07 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff7f174e78 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007fb64d07c6c7
RDX: 0000000000000200 RSI: 00007fff7f175ff0 RDI: 00000000ffffff9c
RBP: 00007fb64d0c8336 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000207 R12: 00007fff7f175ff0
R13: 00007fb64d0c8336 R14: 00000000000373d2 R15: 0000000000000003
task:syz-executor.1 state:R running task stack:25840 pid:8364 tgid:8363 ppid:5122 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a50 kernel/sched/core.c:6745
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:119 [inline]
RIP: 0010:lock_is_held_type+0x39/0x190 kernel/locking/lockdep.c:5818
Code: 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 bb ff ff ff ff 83 3d 10 4d 22 04 00 0f 84 00 01 00 00 65 8b 05 57 68 77 74 <85> c0 0f 85 f1 00 00 00 65 4c 8b 2c 25 00 d5 03 00 41 83 bd dc 0a
RSP: 0000:ffffc9000d62fcd0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000000040000
RDX: ffffc9000af95000 RSI: 00000000ffffffff RDI: ffff888023a4ba98
RBP: ffffc9000d62fe40 R08: ffffffff8b7f3f63 R09: 1ffffffff25f6ab0
R10: dffffc0000000000 R11: fffffbfff25f6ab1 R12: ffff88801bbd161e
R13: dffffc0000000000 R14: ffff888023a4b940 R15: ffffc9000d62fe58
lock_is_held include/linux/lockdep.h:231 [inline]
mt_locked lib/maple_tree.c:781 [inline]
mas_root lib/maple_tree.c:832 [inline]
mas_start+0x1d4/0x5a0 lib/maple_tree.c:1362
mas_state_walk lib/maple_tree.c:3671 [inline]
mas_walk+0x49/0x280 lib/maple_tree.c:4909
lock_vma_under_rcu+0x231/0x6e0 mm/memory.c:5840
do_user_addr_fault arch/x86/mm/fault.c:1329 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x17b/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f258de287f6
RSP: 002b:00007f258ec4b530 EFLAGS: 00010206
RAX: 0000000000868001 RBX: 00007f258ec4b5d0 RCX: 00000000000000a6
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007f258ec4b670
RBP: 0000000000000102 R08: 00007f2583c00000 R09: 0000000000868000
R10: 0000000000000000 R11: 00007f258ec4b5e0 R12: 0000000000000001
R13: 00007f258deebfc0 R14: 0000000000000000 R15: 00007f258ec4b670
rcu: rcu_preempt kthread starved for 10486 jiffies! g30509 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:25136 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a50 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:2000
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 140 Comm: kworker/u8:6 Not tainted 6.9.0-next-20240515-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline]
RIP: 0010:smp_call_function_many_cond+0x1894/0x2a00 kernel/smp.c:855
Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 f5 f2 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 a0 ee 0b 00 eb 38 f3 90 <42> 0f b6 04 23 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 84 ee
RSP: 0018:ffffc90002d876e0 EFLAGS: 00000293
RAX: ffffffff818a5dfc RBX: 1ffff110172a88a9 RCX: ffff88801a32bc00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90002d878e0 R08: ffffffff818a5dcb R09: 1ffffffff25f6ab0
R10: dffffc0000000000 R11: fffffbfff25f6ab1 R12: dffffc0000000000
R13: ffff8880b9544548 R14: ffff8880b943f900 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f179ff5dd58 CR3: 000000000e132000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2069 [inline]
text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2279
text_poke_flush arch/x86/kernel/alternative.c:2470 [inline]
text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2477
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
toggle_allocation_gate+0xb5/0x250 mm/kfence/core.c:826
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
worker_thread+0x86d/0xd70 kernel/workqueue.c:3393
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244