rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (10489 ticks this GP) idle=3f6/1/0x4000000000000000 softirq=283139/283147 fqs=1
(t=10501 jiffies g=530521 q=20)
rcu: rcu_preempt kthread starved for 10496 jiffies! g530521 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:28880 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4681 [inline]
__schedule+0x93a/0x26f0 kernel/sched/core.c:5938
schedule+0xd3/0x270 kernel/sched/core.c:6017
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop kernel/rcu/tree.c:1996 [inline]
rcu_gp_kthread+0xd34/0x1980 kernel/rcu/tree.c:2169
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: 16078 Comm: syz-executor.2 Not tainted 5.14.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_preemption_disabled+0x2/0x140 lib/smp_processor_id.c:13
Code: 1f 44 00 00 e8 5f 29 6b f8 65 48 8b 3c 25 00 f0 01 00 e8 81 1e 24 f8 eb 99 0f 1f 44 00 00 0f 0b e9 23 ff ff ff cc cc cc 41 56 <41> 55 49 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 6d
RSP: 0018:ffffc90000dc0de0 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 1ffff920001b81c5 RCX: ffffffff815b2b48
RDX: 0000000000000001 RSI: ffffffff89e3cda0 RDI: ffffffff89e3cde0
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8d6c9157
R10: fffffbfff1ad922a R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffff8880b9d423d8 R15: 0000000000000000
FS: 00007f76a0ba6700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32e2c000 CR3: 000000008671b000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1208 [inline]
rcu_lockdep_current_cpu_online+0x2d/0x150 kernel/rcu/tree.c:1199
rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
rcu_read_lock_held_common kernel/rcu/update.c:102 [inline]
rcu_read_lock_sched_held+0x25/0x70 kernel/rcu/update.c:123
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:159
hrtimer_interrupt+0x103/0xa00 kernel/time/hrtimer.c:1644
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1106
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:434 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x3ba/0xb40 kernel/locking/qspinlock.c:508
Code: eb c6 45 01 01 41 bc 00 80 00 00 48 c1 e9 03 83 e3 07 41 be 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 2c 01 eb 0c f3 90 <41> 83 ec 01 0f 84 72 04 00 00 41 0f b6 45 00 38 d8 7f 08 84 c0 0f
RSP: 0018:ffffc9000183f1c0 EFLAGS: 00000206
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 1ffff11005262878
RDX: 0000000000000001 RSI: ffffffff817bd271 RDI: ffffffff81332591
RBP: ffff8880293143c0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817bd239 R11: 0000000000000000 R12: 000000000000204c
R13: ffffed1005262878 R14: 0000000000000001 R15: ffff8880b9d527c0
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:113
spin_lock include/linux/spinlock.h:354 [inline]
ext4_lock_group+0x1e5/0x240 fs/ext4/ext4.h:3456
ext4_mb_mark_diskspace_used+0x541/0x1230 fs/ext4/mballoc.c:3766
ext4_mb_new_blocks+0xd30/0x5230 fs/ext4/mballoc.c:5533
ext4_ext_map_blocks+0x1fa3/0x6070 fs/ext4/extents.c:4245
ext4_map_blocks+0x653/0x17d0 fs/ext4/inode.c:638
ext4_alloc_file_blocks.isra.0+0x2c1/0xae0 fs/ext4/extents.c:4432
ext4_fallocate+0x45e/0x3ff0 fs/ext4/extents.c:4712
vfs_fallocate+0x48d/0xd80 fs/open.c:311
ioctl_preallocate+0x18e/0x200 fs/ioctl.c:497
file_ioctl fs/ioctl.c:537 [inline]
do_vfs_ioctl+0x1144/0x15d0 fs/ioctl.c:1048
__do_sys_ioctl fs/ioctl.c:1067 [inline]
__se_sys_ioctl fs/ioctl.c:1055 [inline]
__x64_sys_ioctl+0x108/0x200 fs/ioctl.c:1055
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:00007f76a0ba6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000020000040 RSI: 000000004030582a RDI: 0000000000000004
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffc6b3c5c6f R14: 00007f76a0ba6300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 16074 Comm: syz-executor.4 Not tainted 5.14.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:342
print_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:700 [inline]
rcu_pending kernel/rcu/tree.c:3922 [inline]
rcu_sched_clock_irq.cold+0x9f/0x747 kernel/rcu/tree.c:2641
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
__run_hrtimer kernel/time/hrtimer.c:1537 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1601
hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1106
sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1100
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:mac80211_hwsim_tx_frame_no_nl.isra.0+0x77b/0x1330 drivers/net/wireless/mac80211_hwsim.c:1527
Code: 00 00 00 c6 84 24 98 00 00 00 00 74 bb e8 8d 6c 42 fc 48 8d bb ac 3c 00 00 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 0f b6 04 28 <38> d0 7f 08 84 c0 0f 85 36 09 00 00 44 0f b6 bb ac 3c 00 00 31 ff
RSP: 0018:ffffc90000007ba0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff8880874db260 RCX: 0000000000000100
RDX: 0000000000000004 RSI: ffffffff85333d23 RDI: ffff8880874def0c
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff85333d59 R11: 0000000000000000 R12: ffff888018c2eb40
R13: ffff888071ea3490 R14: ffff888071ea3260 R15: 0000000000000000
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:1537 [inline]
__hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1601
hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1618
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x16e/0x1c0 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:1100
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x60 kernel/kcov.c:197
Code: 81 e1 00 01 00 00 65 48 8b 14 25 00 f0 01 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 34 15 00 00 85 c0 74 2b 8b 82 10 15 00 00 <83> f8 02 75 20 48 8b 8a 18 15 00 00 8b 92 14 15 00 00 48 8b 01 48
RSP: 0018:ffffc900017ff318 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000b80 RCX: 0000000000000000
RDX: ffff888081d93880 RSI: ffffffff8213ca4b RDI: 0000000000000003
RBP: ffff88803042216c R08: 000000000000001f R09: ffff888029340627
R10: ffffffff8213ca87 R11: 0000000000000000 R12: 0000000000001000
R13: ffff888030422000 R14: 0000000000000000 R15: ffff88808b2f99fc
ext4_set_bits+0x7b/0x120 fs/ext4/mballoc.c:1693
ext4_mb_mark_diskspace_used+0x5d4/0x1230 fs/ext4/mballoc.c:3776
ext4_mb_new_blocks+0xd30/0x5230 fs/ext4/mballoc.c:5533
ext4_ext_map_blocks+0x1fa3/0x6070 fs/ext4/extents.c:4245
ext4_map_blocks+0x653/0x17d0 fs/ext4/inode.c:638
ext4_alloc_file_blocks.isra.0+0x2c1/0xae0 fs/ext4/extents.c:4432
ext4_fallocate+0x45e/0x3ff0 fs/ext4/extents.c:4712
vfs_fallocate+0x48d/0xd80 fs/open.c:311
ioctl_preallocate+0x18e/0x200 fs/ioctl.c:497
file_ioctl fs/ioctl.c:537 [inline]
do_vfs_ioctl+0x1144/0x15d0 fs/ioctl.c:1048
__do_sys_ioctl fs/ioctl.c:1067 [inline]
__se_sys_ioctl fs/ioctl.c:1055 [inline]
__x64_sys_ioctl+0x108/0x200 fs/ioctl.c:1055
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:00007f39c6a47188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000020000040 RSI: 000000004030582a RDI: 0000000000000004
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffd5d64e38f R14: 00007f39c6a47300 R15: 0000000000022000
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 44 00 00 add %r8b,(%rax)
3: e8 5f 29 6b f8 callq 0xf86b2967
8: 65 48 8b 3c 25 00 f0 mov %gs:0x1f000,%rdi
f: 01 00
11: e8 81 1e 24 f8 callq 0xf8241e97
16: eb 99 jmp 0xffffffb1
18: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1d: 0f 0b ud2
1f: e9 23 ff ff ff jmpq 0xffffff47
24: cc int3
25: cc int3
26: cc int3
27: 41 56 push %r14
* 29: 41 55 push %r13 <-- trapping instruction
2b: 49 89 f5 mov %rsi,%r13
2e: 41 54 push %r12
30: 55 push %rbp
31: 48 89 fd mov %rdi,%rbp
34: 53 push %rbx
35: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
3a: 65 gs
3b: 44 rex.R
3c: 8b .byte 0x8b
3d: 25 .byte 0x25
3e: 6d insl (%dx),%es:(%rdi)