rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (10482 ticks this GP) idle=df5/1/0x4000000000000000 softirq=27673/27680 fqs=183
(t=10501 jiffies g=39645 q=1064)
rcu: rcu_preempt kthread starved for 409 jiffies! g39645 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 18661 Comm: syz-executor.1 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_acquire+0x49/0x510 kernel/locking/lockdep.c:5593
Code: 44 89 c5 53 48 81 ec b0 00 00 00 48 8d 5c 24 10 4c 89 0c 24 48 c7 44 24 10 b3 8a b5 41 48 c1 eb 03 48 c7 44 24 18 8a 2b 14 8b <48> 01 d8 48 c7 44 24 20 e0 71 5b 81 c7 00 f1 f1 f1 f1 c7 40 04 f1
RSP: 0018:ffffc900000078e0 EFLAGS: 00000016
RAX: dffffc0000000000 RBX: 1ffff92000000f1e RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8b99ec88
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff816657f7 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8b99ec88 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564dc652e468 CR3: 0000000035977000 CR4: 0000000000350ef0
Call Trace:
seqcount_lockdep_reader_access include/linux/seqlock.h:103 [inline]
timekeeping_get_delta kernel/time/timekeeping.c:252 [inline]
timekeeping_get_ns kernel/time/timekeeping.c:386 [inline]
ktime_get+0x147/0x470 kernel/time/timekeeping.c:829
clockevents_program_event+0x141/0x370 kernel/time/clockevents.c:326
tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:44
hrtimer_interrupt+0x36e/0x790 kernel/time/hrtimer.c:1824
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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 9a c2 25 f8 48 89 ef e8 e2 38 26 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 e3 f9 19 f8 65 8b 05 ac 47 cc 76 85 c0 74 0a 5b 5d c3 e8 40 96
RSP: 0018:ffffc90000007c08 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000200 RCX: 1ffffffff1adc05d
RDX: 0000000000000000 RSI: ffffffff817c3ef1 RDI: 0000000000000001
RBP: ffff8880b9c20240 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff817c3ed8 R11: 0000000000000000 R12: 0000000100001c4d
R13: ffff8880b9c20240 R14: 0000000000000000 R15: 00000000ffffffff
__mod_timer+0x837/0xe30 kernel/time/timer.c:1065
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__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:in_lock_functions+0x2/0x20 kernel/locking/spinlock.c:404
Code: 25 ef 8e e8 60 11 61 00 eb 80 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 31 c0 <48> 81 ff 78 a4 35 89 72 0c 31 c0 48 81 ff c1 ae 35 89 0f 92 c0 c3
RSP: 0018:ffffc9000a0f7498 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff888034b88000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff817c3ef1 RDI: ffffffff8100460d
RBP: ffffed1006971000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff817c3ed8 R11: 0000000000086088 R12: dffffc0000000000
R13: ffffffff8100460d R14: dead000000000100 R15: dffffc0000000000
get_lock_parent_ip include/linux/ftrace.h:857 [inline]
preempt_latency_start kernel/sched/core.c:5381 [inline]
preempt_latency_start kernel/sched/core.c:5378 [inline]
preempt_schedule_common+0x7a/0xc0 kernel/sched/core.c:6458
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
_raw_spin_unlock_irqrestore+0x57/0x70 kernel/locking/spinlock.c:194
__debug_check_no_obj_freed lib/debugobjects.c:1002 [inline]
debug_check_no_obj_freed+0x20c/0x420 lib/debugobjects.c:1023
free_pages_prepare mm/page_alloc.c:1351 [inline]
free_pcp_prepare+0x24e/0x780 mm/page_alloc.c:1397
free_unref_page_prepare mm/page_alloc.c:3332 [inline]
free_unref_page+0x19/0x690 mm/page_alloc.c:3411
release_pages+0x7e2/0x20b0 mm/swap.c:948
tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:242 [inline]
tlb_flush_mmu+0xe9/0x6b0 mm/mmu_gather.c:249
zap_pte_range mm/memory.c:1432 [inline]
zap_pmd_range mm/memory.c:1481 [inline]
zap_pud_range mm/memory.c:1510 [inline]
zap_p4d_range mm/memory.c:1531 [inline]
unmap_page_range+0x1c58/0x2a10 mm/memory.c:1552
unmap_single_vma+0x198/0x310 mm/memory.c:1597
unmap_vmas+0x16d/0x2f0 mm/memory.c:1629
exit_mmap+0x1d0/0x620 mm/mmap.c:3195
__mmput+0x122/0x470 kernel/fork.c:1103
mmput+0x58/0x60 kernel/fork.c:1124
exit_mm kernel/exit.c:501 [inline]
do_exit+0xabc/0x2a30 kernel/exit.c:812
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x47f/0x2160 kernel/signal.c:2868
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
Code: Unable to access opcode bytes at RIP 0x4665cf.
RSP: 002b:00007ff45412a218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000056bf88 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88
RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c
R13: 00007ffda074b7af R14: 00007ff45412a300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 18639 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
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 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:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3880 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2599
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:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 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:deref_stack_reg+0x20/0x150 arch/x86/kernel/unwind_orc.c:351
Code: 89 00 48 8b 0c 24 eb 9d 66 90 48 b8 00 00 00 00 00 fc ff df 41 55 41 54 49 89 fc 55 48 89 f5 53 48 89 d3 48 89 fa 48 c1 ea 03 <48> 83 ec 08 0f b6 04 02 84 c0 74 08 3c 03 0f 8e d7 00 00 00 41 8b
RSP: 0018:ffffc90000dc0718 EFLAGS: 00000216
RAX: dffffc0000000000 RBX: ffffc90000dc0858 RCX: 0000000000000000
RDX: 1ffff920001b8103 RSI: ffffc90009fa7f48 RDI: ffffc90000dc0818
RBP: ffffc90009fa7f48 R08: ffffffff8e7ea0bc R09: 0000000000000001
R10: fffff520001b810e R11: 0000000000086088 R12: ffffc90000dc0818
R13: ffffc90000dc084d R14: ffffc90000dc0818 R15: ffffc90000dc084c
unwind_next_frame+0x13e0/0x1ce0 arch/x86/kernel/unwind_orc.c:587
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+0xff/0x130 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1628 [inline]
slab_free_freelist_hook+0xe3/0x250 mm/slub.c:1653
slab_free mm/slub.c:3213 [inline]
kfree+0xe4/0x540 mm/slub.c:4267
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: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:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:212 [inline]
RIP: 0010:trace_rss_stat+0x14/0x290 include/trace/events/kmem.h:366
Code: 12 00 e9 fc fd ff ff 48 89 ef e8 27 20 12 00 e9 1b fe ff ff 66 90 41 55 41 89 f5 41 54 49 89 d4 55 48 89 fd 53 e8 4c 6f cb ff <66> 90 e8 45 6f cb ff e8 40 6f cb ff 65 8b 1d 21 ee 56 7e bf 07 00
RSP: 0018:ffffc90009fa7788 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffc90009fa7898 RCX: 0000000000000000
RDX: ffff8880670ed580 RSI: ffffffff81aaa734 RDI: ffff88802927d400
RBP: ffff88802927d400 R08: 0000000000000001 R09: ffff88802927d7f7
R10: ffffed100524fafe R11: 0000000000000000 R12: 00000000000022b1
R13: 0000000000000000 R14: dffffc0000000000 R15: 000000000046e000
mm_trace_rss_stat mm/memory.c:172 [inline]
add_mm_counter include/linux/mm.h:1939 [inline]
add_mm_rss_vec mm/memory.c:502 [inline]
zap_pte_range mm/memory.c:1416 [inline]
zap_pmd_range mm/memory.c:1481 [inline]
zap_pud_range mm/memory.c:1510 [inline]
zap_p4d_range mm/memory.c:1531 [inline]
unmap_page_range+0x10c0/0x2a10 mm/memory.c:1552
unmap_single_vma+0x198/0x310 mm/memory.c:1597
unmap_vmas+0x16d/0x2f0 mm/memory.c:1629
exit_mmap+0x1d0/0x620 mm/mmap.c:3195
__mmput+0x122/0x470 kernel/fork.c:1103
mmput+0x58/0x60 kernel/fork.c:1124
exit_mm kernel/exit.c:501 [inline]
do_exit+0xabc/0x2a30 kernel/exit.c:812
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x47f/0x2160 kernel/signal.c:2868
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
Code: Unable to access opcode bytes at RIP 0x4665cf.
RSP: 002b:00007f47cf679188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: fffffffffffffffe RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffffff
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffcb906545f R14: 00007f47cf679300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 44 89 c5 mov %r8d,%ebp
3: 53 push %rbx
4: 48 81 ec b0 00 00 00 sub $0xb0,%rsp
b: 48 8d 5c 24 10 lea 0x10(%rsp),%rbx
10: 4c 89 0c 24 mov %r9,(%rsp)
14: 48 c7 44 24 10 b3 8a movq $0x41b58ab3,0x10(%rsp)
1b: b5 41
1d: 48 c1 eb 03 shr $0x3,%rbx
21: 48 c7 44 24 18 8a 2b movq $0xffffffff8b142b8a,0x18(%rsp)
28: 14 8b
* 2a: 48 01 d8 add %rbx,%rax <-- trapping instruction
2d: 48 c7 44 24 20 e0 71 movq $0xffffffff815b71e0,0x20(%rsp)
34: 5b 81
36: c7 00 f1 f1 f1 f1 movl $0xf1f1f1f1,(%rax)
3c: c7 .byte 0xc7
3d: 40 04 f1 add $0xf1,%al