rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
(detected by 0, t=10502 jiffies, g=496181, q=25)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4295249573-4295239070), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g496181 f0x2 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:28736 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x940/0x26f0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x800 kernel/rcu/tree.c:1957
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2130
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7081 Comm: syz-executor.3 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_is_held_type+0x4/0x140 kernel/locking/lockdep.c:5653
Code: f1 8b 89 48 c7 c7 a0 ed 8b 89 89 44 24 04 e8 44 73 bd ff 0f 0b 8b 44 24 04 eb bd 66 66 2e 0f 1f 84 00 00 00 00 00 41 57 41 56 <41> 55 41 bd ff ff ff ff 41 54 55 53 48 83 ec 08 8b 0d f2 21 3a 04
RSP: 0018:ffffc90000dc0570 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 1ffff920001b80b5 RCX: ffffffff8161d3a4
RDX: 1ffffffff17310e6 RSI: 00000000ffffffff RDI: ffffffff8b97f8a0
RBP: 0000000000000001 R08: 0000000000000000 R09: ffff8880b9d3298b
R10: ffffed10173a6531 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffffffff903fef60 R15: 0000000000000000
FS: 00007f4e26e3b700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000754b2000 CR4: 00000000001506e0
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+0x3a/0x70 kernel/rcu/update.c:125
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5596
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:661
debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
debug_activate kernel/time/hrtimer.c:475 [inline]
enqueue_hrtimer+0x27/0x3e0 kernel/time/hrtimer.c:1084
__run_hrtimer kernel/time/hrtimer.c:1702 [inline]
__hrtimer_run_queues+0xb02/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:pv_wait_node kernel/locking/qspinlock_paravirt.h:301 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x5c4/0xb40 kernel/locking/qspinlock.c:473
Code: 32 84 c0 75 23 41 0f b6 14 24 4c 89 e9 83 e1 07 38 ca 7f 08 84 d2 0f 85 ed 03 00 00 0f b6 53 14 84 d2 0f 85 9e 00 00 00 f3 90 <83> e8 01 0f 84 93 00 00 00 0f b6 16 84 d2 74 09 80 fa 03 0f 8e 96
RSP: 0018:ffffc90000dc0a30 EFLAGS: 00000206
RAX: 0000000000006366 RBX: ffff8880b9c327c0 RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffffed10173a64f9 RDI: ffff8880b9d327d4
RBP: ffff8880b9d327d4 R08: 0000000000000001 R09: ffff8880b9d327d4
R10: ffffed10173a64fa R11: 0000000000000080 R12: ffffed10173864fa
R13: ffff8880b9c327d4 R14: dffffc0000000000 R15: ffff8880b9d327c0
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
do_raw_spin_lock+0x200/0x2b0 kernel/locking/spinlock_debug.c:115
spin_lock include/linux/spinlock.h:363 [inline]
mac80211_hwsim_tx_frame_no_nl.isra.0+0x68f/0x1330 drivers/net/wireless/mac80211_hwsim.c:1516
mac80211_hwsim_tx_frame+0x1ee/0x2a0 drivers/net/wireless/mac80211_hwsim.c:1784
mac80211_hwsim_beacon_tx+0x49b/0x930 drivers/net/wireless/mac80211_hwsim.c:1838
__iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0x70/0x180 net/mac80211/util.c:829
mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1861
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1766
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:6687
Code: 55 53 65 48 8b 1c 25 40 f0 01 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 e2 ab 19 f8 e8 dd 3e 46 f8 fb bf 01 00 00 00 d2 cd ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 e0 9a 19
RSP: 0018:ffffc90001eff498 EFLAGS: 00000202
RAX: 0000000000004967 RBX: ffff8880a3073900 RCX: 1ffffffff1fa691a
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed101460e720 R08: 0000000000000001 R09: ffffffff8fcfb977
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
irqentry_exit+0x31/0x80 kernel/entry/common.c:427
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__sanitizer_cov_trace_pc+0x3c/0x60 kernel/kcov.c:200
Code: 00 65 48 8b 14 25 40 f0 01 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 3c 15 00 00 85 c0 74 2b 8b 82 18 15 00 00 83 f8 02 75 20 <48> 8b 8a 20 15 00 00 8b 92 1c 15 00 00 48 8b 01 48 83 c0 01 48 39
RSP: 0018:ffffc90001eff568 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff8880a3073900 RSI: ffffffff820a3080 RDI: 0000000000000003
RBP: ffff888147f38000 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff820a3072 R11: 0000000000000000 R12: ffff8880113daae0
R13: 0000000000000000 R14: ffff888147f38678 R15: 0000000000000001
rcu_read_unlock include/linux/rcupdate.h:719 [inline]
ext4_get_group_desc+0x1f0/0x500 fs/ext4/balloc.c:284
recently_deleted fs/ext4/ialloc.c:685 [inline]
find_inode_bit+0x1c4/0x580 fs/ext4/ialloc.c:731
__ext4_new_inode+0xc64/0x5ba0 fs/ext4/ialloc.c:1066
ext4_create+0x2d6/0x4d0 fs/ext4/namei.c:2746
lookup_open.isra.0+0xfe4/0x13d0 fs/namei.c:3280
open_last_lookups fs/namei.c:3350 [inline]
path_openat+0x9a5/0x2740 fs/namei.c:3556
do_filp_open+0x1aa/0x400 fs/namei.c:3586
do_sys_openat2+0x16d/0x4d0 fs/open.c:1200
do_sys_open fs/open.c:1216 [inline]
__do_sys_openat fs/open.c:1232 [inline]
__se_sys_openat fs/open.c:1227 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1227
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f4e26e3b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 00000000000026e1 RSI: 0000000020000440 RDI: ffffffffffffff9c
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffea7ae699f R14: 00007f4e26e3b300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: f1 icebp
1: 8b 89 48 c7 c7 a0 mov -0x5f3838b8(%rcx),%ecx
7: ed in (%dx),%eax
8: 8b 89 89 44 24 04 mov 0x4244489(%rcx),%ecx
e: e8 44 73 bd ff callq 0xffbd7357
13: 0f 0b ud2
15: 8b 44 24 04 mov 0x4(%rsp),%eax
19: eb bd jmp 0xffffffd8
1b: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
22: 00 00 00 00
26: 41 57 push %r15
28: 41 56 push %r14
* 2a: 41 55 push %r13 <-- trapping instruction
2c: 41 bd ff ff ff ff mov $0xffffffff,%r13d
32: 41 54 push %r12
34: 55 push %rbp
35: 53 push %rbx
36: 48 83 ec 08 sub $0x8,%rsp
3a: 8b 0d f2 21 3a 04 mov 0x43a21f2(%rip),%ecx # 0x43a2232