rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=ceb/1/0x4000000000000000 softirq=69711/69712 fqs=2531
(detected by 1, t=10502 jiffies, g=109449, q=5073)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 25564 Comm: syz-executor.5 Not tainted 5.15.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline]
RIP: 0010:lock_is_held_type+0x63/0x190 kernel/locking/lockdep.c:5664
Code: fb 00 00 00 65 4c 8b 2c 25 c0 ef 01 00 41 83 bd f4 09 00 00 00 0f 85 e4 00 00 00 41 89 f6 49 89 ff 48 c7 04 24 00 00 00 00 9c <8f> 04 24 4c 8b 24 24 fa 48 c7 c7 a0 fa 4e 8a e8 69 11 00 00 65 ff
RSP: 0018:ffffc90000007a10 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000000010002
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8c91c0e0
RBP: ffffc90000007af0 R08: dffffc0000000000 R09: ffffed10173864a2
R10: ffffed10173864a2 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880192bb900 R14: 00000000ffffffff R15: ffffffff8c91c0e0
FS: 0000555555e6f400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcc11118004 CR3: 000000009d90a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x89/0x130 kernel/rcu/update.c:125
trace_lock_release+0x4f/0x150 include/trace/events/lock.h:58
lock_release+0x82/0x810 kernel/locking/lockdep.c:5636
__raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
_raw_spin_unlock+0x12/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:403 [inline]
advance_sched+0x68b/0x930 net/sched/sch_taprio.c:759
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x50b/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:posix_acl_create+0x0/0x560 fs/posix_acl.c:616
Code: 5c 41 5d 41 5e 41 5f 5d c3 e8 0c ab 86 ff 48 89 df be 03 00 00 00 e8 ef 1a 15 02 eb af e8 68 3e fd 07 0f 1f 84 00 00 00 00 00 <55> 41 57 41 56 41 55 41 54 53 48 83 ec 18 49 89 ce 48 89 d5 48 89
RSP: 0018:ffffc90005667938 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc900056679a0 RCX: ffffc900056679a0
RDX: ffffc90005667980 RSI: ffff88806bb9aa80 RDI: ffff88808c1dd260
RBP: ffffc90005667a10 R08: ffffffff8223bc6f R09: ffffc90005667940
R10: fffff52000accf31 R11: 0000000000000000 R12: ffff88806bb9aa80
R13: 1ffff92000accf30 R14: 1ffff92000accf2c R15: 1ffff92000accf34
ext4_init_acl+0xf0/0x410 fs/ext4/acl.c:285
__ext4_new_inode+0x4308/0x5650 fs/ext4/ialloc.c:1321
ext4_symlink+0x4e1/0xfa0 fs/ext4/namei.c:3293
vfs_symlink+0x379/0x590 fs/namei.c:4250
do_symlinkat+0x22c/0x650 fs/namei.c:4279
__do_sys_symlink fs/namei.c:4301 [inline]
__se_sys_symlink fs/namei.c:4299 [inline]
__x64_sys_symlink+0x7a/0x90 fs/namei.c:4299
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb7d12291e7
Code: 73 01 c3 48 c7 c1 bc 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 58 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffde6fbc8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb7d12291e7
RDX: 00007ffde6fbc993 RSI: 00007fb7d1283d5e RDI: 00007ffde6fbc980
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffde6fbc750
R10: 00007ffde6fbc607 R11: 0000000000000206 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffde6fbc980
rcu: rcu_preempt kthread starved for 5398 jiffies! g109449 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:26136 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xc8d/0x1270 kernel/sched/core.c:6287
schedule+0x14b/0x210 kernel/sched/core.c:6366
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x1fd/0x770 kernel/rcu/tree.c:1957
rcu_gp_kthread+0xa5/0x350 kernel/rcu/tree.c:2130
kthread+0x453/0x480 kernel/kthread.c:319
ret_from_fork+0x1f/0x30
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 9608 Comm: kworker/1:9 Not tainted 5.15.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events perf_sched_delayed
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_check_gp_kthread_starvation+0x1ff/0x270 kernel/rcu/tree_stall.h:481
print_other_cpu_stall kernel/rcu/tree_stall.h:586 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:729 [inline]
rcu_pending kernel/rcu/tree.c:3880 [inline]
rcu_sched_clock_irq+0x23d5/0x2bc0 kernel/rcu/tree.c:2599
update_process_times+0x197/0x200 kernel/time/timer.c:1785
tick_sched_handle kernel/time/tick-sched.c:226 [inline]
tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1421
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0xbb2/0xda0 kernel/smp.c:969
Code: 83 e6 01 31 ff e8 ae 9f 0b 00 41 83 e7 01 49 bf 00 00 00 00 00 fc ff df 75 0e e8 89 9b 0b 00 eb 4c 0f 1f 80 00 00 00 00 f3 90 <42> 0f b6 04 3b 84 c0 75 11 41 f7 45 00 01 00 00 00 74 2b e8 66 9b
RSP: 0018:ffffc9000b707920 EFLAGS: 00000293
RAX: ffffffff8176d79a RBX: 1ffff11017387305 RCX: ffff88801ec45580
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000b707a60 R08: ffffffff8176d762 R09: ffffffff84353480
R10: 0000000000000009 R11: ffff88801ec45580 R12: 0000000000000000
R13: ffff8880b9c39828 R14: ffff8880b9d325c0 R15: dffffc0000000000
on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:929 [inline]
text_poke_bp_batch+0x310/0x940 arch/x86/kernel/alternative.c:1114
text_poke_flush arch/x86/kernel/alternative.c:1268 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1275
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
static_key_disable_cpuslocked+0xcc/0x1b0 kernel/jump_label.c:207
static_key_disable+0x16/0x20 kernel/jump_label.c:215
perf_sched_delayed+0x58/0x70 kernel/events/core.c:4832
process_one_work+0x853/0x1140 kernel/workqueue.c:2297
worker_thread+0xac1/0x1320 kernel/workqueue.c:2444
kthread+0x453/0x480 kernel/kthread.c:319
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: fb sti
1: 00 00 add %al,(%rax)
3: 00 65 4c add %ah,0x4c(%rbp)
6: 8b 2c 25 c0 ef 01 00 mov 0x1efc0,%ebp
d: 41 83 bd f4 09 00 00 cmpl $0x0,0x9f4(%r13)
14: 00
15: 0f 85 e4 00 00 00 jne 0xff
1b: 41 89 f6 mov %esi,%r14d
1e: 49 89 ff mov %rdi,%r15
21: 48 c7 04 24 00 00 00 movq $0x0,(%rsp)
28: 00
29: 9c pushfq
* 2a: 8f 04 24 popq (%rsp) <-- trapping instruction
2d: 4c 8b 24 24 mov (%rsp),%r12
31: fa cli
32: 48 c7 c7 a0 fa 4e 8a mov $0xffffffff8a4efaa0,%rdi
39: e8 69 11 00 00 callq 0x11a7
3e: 65 gs
3f: ff .byte 0xff