rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=c47/1/0x4000000000000000 softirq=43313/43314 fqs=2
(detected by 1, t=10502 jiffies, g=67421, q=92)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 12060 Comm: syz-executor.0 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:221 [inline]
RIP: 0010:__sanitizer_cov_trace_cmp8+0xd/0x90 kernel/kcov.c:267
Code: 34 01 4c 89 44 f9 18 49 ff c2 4c 89 11 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 4c 8b 04 24 65 48 8b 14 25 80 6f 02 00 <65> 8b 05 84 c8 7c 7e a9 00 01 ff 00 74 10 a9 00 01 00 00 74 6a 83
RSP: 0018:ffffc90000007ce0 EFLAGS: 00000046
RAX: ffffffff844907df RBX: 0000000000000001 RCX: ffff88801efdd700
RDX: ffff88801efdd700 RSI: ffff888014584340 RDI: 0000000000000001
RBP: dffffc0000000000 R08: ffffffff84490804 R09: fffffbfff1c02706
R10: fffffbfff1c02706 R11: 0000000000000000 R12: 1ffff110028b0868
R13: ffff888014584340 R14: ffff8880b9a2a610 R15: ffff888014584340
FS: 00007fa379037700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000001ae0c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
timerqueue_del+0x44/0xf0 lib/timerqueue.c:55
__remove_hrtimer kernel/time/hrtimer.c:1116 [inline]
__run_hrtimer kernel/time/hrtimer.c:1665 [inline]
__hrtimer_run_queues+0x3dd/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:__mark_inode_dirty+0x0/0x8f0 fs/fs-writeback.c:2393
Code: 51 c2 8c 31 c9 e8 50 d1 6c ff eb 05 e8 89 44 9c ff 89 d8 5b 41 5c 41 5e 41 5f 5d c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <55> 41 57 41 56 41 55 41 54 53 48 83 ec 20 41 89 f4 49 89 fe 49 bf
RSP: 0018:ffffc90003aa7358 EFLAGS: 00000283
RAX: ffffffff822e7016 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc90002d01000 RSI: 0000000000000007 RDI: ffff888038e0c868
RBP: ffffc90003aa7530 R08: ffffffff822e5431 R09: ffffed10071c191f
R10: ffffed10071c191f R11: 0000000000000000 R12: ffffc90003aa77a8
R13: ffff888038e0c868 R14: 000000000000000c R15: 1ffff92000754ef5
mark_inode_dirty include/linux/fs.h:2379 [inline]
dquot_alloc_space include/linux/quotaops.h:317 [inline]
dquot_alloc_block include/linux/quotaops.h:334 [inline]
ext4_mb_new_blocks+0x2b33/0x45a0 fs/ext4/mballoc.c:5544
ext4_ext_map_blocks+0x2a82/0x6ef0 fs/ext4/extents.c:4282
ext4_map_blocks+0xab9/0x1e30 fs/ext4/inode.c:638
ext4_getblk+0x19c/0x700 fs/ext4/inode.c:849
ext4_bread+0x2a/0x170 fs/ext4/inode.c:902
ext4_append+0x1a6/0x370 fs/ext4/namei.c:67
ext4_init_new_dir+0x337/0xa10 fs/ext4/namei.c:2893
ext4_mkdir+0x4b8/0xc00 fs/ext4/namei.c:2939
vfs_mkdir+0x2f6/0x4d0 fs/namei.c:3883
do_mkdirat+0x277/0x530 fs/namei.c:3909
__do_sys_mkdir fs/namei.c:3929 [inline]
__se_sys_mkdir fs/namei.c:3927 [inline]
__x64_sys_mkdir+0x6a/0x80 fs/namei.c:3927
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: 0033:0x7fa37a6c1167
Code: 73 01 c3 48 c7 c1 b8 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 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa379036f88 EFLAGS: 00000213 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000020000180 RCX: 00007fa37a6c1167
RDX: 0000000000000004 RSI: 00000000000001ff RDI: 0000000020000100
RBP: 00007fa379037020 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000213 R12: 0000000020000000
R13: 0000000020000100 R14: 00007fa379036fe0 R15: 0000000020000200
rcu: rcu_preempt kthread starved for 10498 jiffies! g67421 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:26640 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0x926/0x1080 kernel/sched/core.c:6296
schedule+0x12b/0x1f0 kernel/sched/core.c:6369
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x1fd/0x770 kernel/rcu/tree.c:1963
rcu_gp_kthread+0xa5/0x350 kernel/rcu/tree.c:2136
kthread+0x2a3/0x2d0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 9603 Comm: kworker/u4:20 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
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:111
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:458
print_other_cpu_stall kernel/rcu/tree_stall.h:563 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:706 [inline]
rcu_pending kernel/rcu/tree.c:3919 [inline]
rcu_sched_clock_irq+0x23d5/0x2bc0 kernel/rcu/tree.c:2617
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:1428
__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 b8 0b 00 41 83 e7 01 49 bf 00 00 00 00 00 fc ff df 75 0e e8 89 b4 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 b4
RSP: 0018:ffffc90004c9f820 EFLAGS: 00000293
RAX: ffffffff8179f04a RBX: 1ffff11017348365 RCX: ffff88801ad00000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90004c9f960 R08: ffffffff8179f012 R09: ffffffff8446b060
R10: 0000000000000009 R11: ffff88801ad00000 R12: 0000000000000000
R13: ffff8880b9a41b28 R14: ffff8880b9b3a840 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:1112 [inline]
text_poke_bp_batch+0x309/0x920 arch/x86/kernel/alternative.c:1300
text_poke_flush arch/x86/kernel/alternative.c:1470 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1477
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x12d/0x250 kernel/jump_label.c:177
static_key_enable+0x16/0x20 kernel/jump_label.c:190
toggle_allocation_gate+0xbf/0x460 mm/kfence/core.c:734
process_one_work+0x850/0x1130 kernel/workqueue.c:2307
worker_thread+0xab1/0x1300 kernel/workqueue.c:2454
kthread+0x2a3/0x2d0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 34 01 xor $0x1,%al
2: 4c 89 44 f9 18 mov %r8,0x18(%rcx,%rdi,8)
7: 49 ff c2 inc %r10
a: 4c 89 11 mov %r10,(%rcx)
d: c3 retq
e: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
15: 00 00 00
18: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1d: 4c 8b 04 24 mov (%rsp),%r8
21: 65 48 8b 14 25 80 6f mov %gs:0x26f80,%rdx
28: 02 00
* 2a: 65 8b 05 84 c8 7c 7e mov %gs:0x7e7cc884(%rip),%eax # 0x7e7cc8b5 <-- trapping instruction
31: a9 00 01 ff 00 test $0xff0100,%eax
36: 74 10 je 0x48
38: a9 00 01 00 00 test $0x100,%eax
3d: 74 6a je 0xa9
3f: 83 .byte 0x83