rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (10490 ticks this GP) idle=afe/1/0x4000000000000000 softirq=254313/254319 fqs=17
(t=10501 jiffies g=488777 q=44)
rcu: rcu_preempt kthread starved for 10467 jiffies! g488777 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:28272 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: 20187 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
RIP: 0010:kasan_check_range+0x17/0x180 mm/kasan/generic.c:188
Code: 0f 1f 00 48 89 f2 be f8 00 00 00 e9 b3 b9 39 02 0f 1f 00 48 85 f6 0f 84 70 01 00 00 49 89 f9 41 54 44 0f b6 c2 49 01 f1 55 53 <0f> 82 18 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f 86 05
RSP: 0018:ffffc90000dc0bf0 EFLAGS: 00000082
RAX: 0000000000000000 RBX: 1ffff920001b8184 RCX: ffffffff815b2b48
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8d6c9050
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8d6c9058
R10: ffffffff81656b0d R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff90486728 R15: 0000000000000000
FS: 00007fd01df88700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005617c14f7000 CR3: 000000007fe91000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
cpumask_test_cpu include/linux/cpumask.h:344 [inline]
cpu_online include/linux/cpumask.h:895 [inline]
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0xb8/0x510 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
debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:656
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:982
__run_hrtimer kernel/time/hrtimer.c:1554 [inline]
__hrtimer_run_queues+0xb02/0xe50 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+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:ffffc90003857288 EFLAGS: 00000206
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 1ffff11029093600
RDX: 0000000000000001 RSI: ffffffff817bd271 RDI: ffffffff81332591
RBP: ffff88814849b000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817bd239 R11: 0000000000000000 R12: 0000000000001664
R13: ffffed1029093600 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 fs/ext4/ext4.h:3456 [inline]
ext4_mb_regular_allocator+0x1977/0x3870 fs/ext4/mballoc.c:2740
ext4_mb_new_blocks+0x24d4/0x5230 fs/ext4/mballoc.c:5515
ext4_ext_map_blocks+0x1fa3/0x6070 fs/ext4/extents.c:4245
ext4_map_blocks+0x653/0x17d0 fs/ext4/inode.c:638
ext4_getblk+0x13c/0x680 fs/ext4/inode.c:848
ext4_bread+0x2a/0x1c0 fs/ext4/inode.c:900
ext4_append+0x177/0x390 fs/ext4/namei.c:67
ext4_init_new_dir+0x33f/0x5e0 fs/ext4/namei.c:2885
ext4_mkdir+0x3cf/0xb20 fs/ext4/namei.c:2931
vfs_mkdir+0x52e/0x760 fs/namei.c:3823
do_mkdirat+0x284/0x310 fs/namei.c:3848
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: 0033:0x4665e9
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:00007fd01df88188 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffc150d47df R14: 00007fd01df88300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 20183 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
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:unwind_next_frame+0x13d1/0x1ce0 arch/x86/kernel/unwind_orc.c:587
Code: f6 40 0f 95 c6 41 84 f1 0f 85 6d 04 00 00 83 e0 07 38 c1 40 0f 9e c6 84 c9 0f 95 c0 40 84 c6 0f 85 56 04 00 00 49 0f bf 70 02 <4d> 8d 7e 34 4c 89 f7 4c 01 e6 e8 d0 ea ff ff 84 c0 0f 85 ac fa ff
RSP: 0018:ffffc90000007740 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff92000000ef0 RCX: 0000000000000000
RDX: ffffc90000007858 RSI: ffffffffffffffd0 RDI: ffffffff8deab1ac
RBP: 0000000000000002 R08: ffffffff8deab1aa R09: 0000000000000001
R10: fffff52000000f0e R11: 0000000000086088 R12: ffffc90000007f30
R13: ffffc9000000784d R14: ffffc90000007818 R15: ffffffff8deab1ae
arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free mm/kasan/common.c:328 [inline]
__kasan_slab_free+0xfb/0x130 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1625 [inline]
slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1650
slab_free mm/slub.c:3210 [inline]
kfree+0xe4/0x530 mm/slub.c:4264
skb_free_head net/core/skbuff.c:654 [inline]
skb_release_data+0x65a/0x790 net/core/skbuff.c:676
skb_release_all net/core/skbuff.c:741 [inline]
__kfree_skb net/core/skbuff.c:755 [inline]
consume_skb net/core/skbuff.c:911 [inline]
consume_skb+0xc2/0x160 net/core/skbuff.c:905
mac80211_hwsim_tx_frame+0x1f6/0x2a0 drivers/net/wireless/mac80211_hwsim.c:1785
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:ffffc90003827008 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffffc90003827530 RCX: 0000000000000000
RDX: ffff88801902d4c0 RSI: ffffffff8212e5f2 RDI: 0000000000000003
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000001301
R10: ffffffff8212e5e5 R11: 0000000000000000 R12: ffffc900038270a0
R13: 000000000000000c R14: ffffc90003827548 R15: ffff888021a74000
mb_find_buddy+0xd2/0x380 fs/ext4/mballoc.c:526
mb_find_order_for_block+0x1c9/0x2d0 fs/ext4/mballoc.c:1633
mb_mark_used+0x49c/0xdc0 fs/ext4/mballoc.c:1959
ext4_mb_use_best_found+0x207/0x8e0 fs/ext4/mballoc.c:2015
ext4_mb_check_limits+0x3f4/0x490 fs/ext4/mballoc.c:2087
ext4_mb_measure_extent fs/ext4/mballoc.c:2159 [inline]
ext4_mb_complex_scan_group+0x5a7/0x9e0 fs/ext4/mballoc.c:2361
ext4_mb_regular_allocator+0xdb0/0x3870 fs/ext4/mballoc.c:2760
ext4_mb_new_blocks+0x24d4/0x5230 fs/ext4/mballoc.c:5515
ext4_ext_map_blocks+0x1fa3/0x6070 fs/ext4/extents.c:4245
ext4_map_blocks+0x653/0x17d0 fs/ext4/inode.c:638
ext4_getblk+0x13c/0x680 fs/ext4/inode.c:848
ext4_bread+0x2a/0x1c0 fs/ext4/inode.c:900
ext4_append+0x177/0x390 fs/ext4/namei.c:67
ext4_init_new_dir+0x33f/0x5e0 fs/ext4/namei.c:2885
ext4_mkdir+0x3cf/0xb20 fs/ext4/namei.c:2931
vfs_mkdir+0x52e/0x760 fs/namei.c:3823
do_mkdirat+0x284/0x310 fs/namei.c:3848
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: 0033:0x4665e9
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:00007fe3894d2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffe2f56ffcf R14: 00007fe3894d2300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 0f 1f 00 nopl (%rax)
3: 48 89 f2 mov %rsi,%rdx
6: be f8 00 00 00 mov $0xf8,%esi
b: e9 b3 b9 39 02 jmpq 0x239b9c3
10: 0f 1f 00 nopl (%rax)
13: 48 85 f6 test %rsi,%rsi
16: 0f 84 70 01 00 00 je 0x18c
1c: 49 89 f9 mov %rdi,%r9
1f: 41 54 push %r12
21: 44 0f b6 c2 movzbl %dl,%r8d
25: 49 01 f1 add %rsi,%r9
28: 55 push %rbp
29: 53 push %rbx
* 2a: 0f 82 18 01 00 00 jb 0x148 <-- trapping instruction
30: 48 b8 ff ff ff ff ff movabs $0xffff7fffffffffff,%rax
37: 7f ff ff
3a: 48 39 c7 cmp %rax,%rdi
3d: 0f .byte 0xf
3e: 86 .byte 0x86
3f: 05 .byte 0x5