clocksource: Long readout interval, skipping watchdog check: cs_nsec: 9537315259 wd_nsec: 9537300174
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10499 ticks this GP) idle=dd3c/1/0x4000000000000000 softirq=55846/55992 fqs=2
rcu: 	(t=10500 jiffies g=49713 q=626 ncpus=2)
rcu: rcu_preempt kthread starved for 10496 jiffies! g49713 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:26632 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 13641 Comm: syz.2.2201 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:kasan_check_range+0x50/0x2c0
Code: 49 b9 00 00 00 00 00 80 ff ff eb 11 cc cc cc f3 0f 1e fa 49 b9 00 00 00 00 00 00 00 ff f3 0f 1e fa 4c 39 cf 0f 82 58 02 00 00 <49> 89 ff 49 c1 ef 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 49
RSP: 0018:ffffc900034977c8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff88803945a5c8 RCX: ffffffff8b7bde5c
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88803945a5c8
RBP: ffffc900034978f8 R08: ffff88803945a5cc R09: ffff800000000000
R10: dffffc0000000000 R11: ffffed100728b4ba R12: 1ffff92000692f08
R13: 0000000000000001 R14: ffffc90003497860 R15: 1ffff1100728b4b9
FS:  000055558d361500(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7585363fc8 CR3: 000000003f6a4000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 native_queued_spin_lock_slowpath+0xbc/0x8e0
 queued_spin_lock_slowpath+0x43/0x50
 do_raw_spin_lock+0x21f/0x290
 futex_unqueue+0xf6/0x240
 __futex_wait+0x223/0x3e0
 futex_wait+0x104/0x360
 do_futex+0x333/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f758458ebe9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd2743cb78 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 000000000007a3b9 RCX: 00007f758458ebe9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f75847b5fac
RBP: 0000000000000032 R08: 7fffffffffffffff R09: 000000202743ce6f
R10: 00007ffd2743cc70 R11: 0000000000000246 R12: 00007f75847b5fac
R13: 00007ffd2743cc70 R14: 000000000007a3eb R15: 00007ffd2743cc90
 </TASK>
CPU: 0 UID: 0 PID: 13642 Comm: syz.2.2201 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:unwind_next_frame+0x223/0x2390
Code: 86 65 18 00 00 44 89 f8 4c 8d 2c 85 3c 07 e0 90 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 48 89 eb 0f 85 1c 1c 00 00 45 8b 6d 00 <44> 89 f8 ff c0 48 8d 2c 85 3c 07 e0 90 48 89 e8 48 c1 e8 03 0f b6
RSP: 0018:ffffc900000075f8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ace213259c12e300
RDX: 00000000000a7d05 RSI: ffffffff8be332e0 RDI: ffffffff8be332a0
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff8172c195
R10: ffffc90000007718 R11: ffffffff81ac3930 R12: ffffffff8184f4d9
R13: 0000000000019696 R14: ffffc900000076c8 R15: 00000000000084f4
FS:  00007f75853856c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000003f6a4000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kmem_cache_free+0x18f/0x400
 skb_release_data+0x62d/0x7c0
 consume_skb+0x9e/0xf0
 mac80211_hwsim_beacon_tx+0x3f0/0x860
 __iterate_interfaces+0x2ab/0x590
 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180
 mac80211_hwsim_beacon+0xbb/0x1c0
 __hrtimer_run_queues+0x52c/0xc60
 hrtimer_run_softirq+0x187/0x2b0
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:futex_wake+0x37f/0x560
Code: 0f b6 04 08 84 c0 0f 85 e0 00 00 00 41 8b 1c 24 44 8b 74 24 2c 44 89 f6 21 de 31 ff e8 ea d4 0b 00 44 21 f3 0f 84 88 00 00 00 <4d> 8d 67 20 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80
RSP: 0018:ffffc900034a7be0 EFLAGS: 00000286
RAX: ffffffff81b3dba6 RBX: 00000000ffffffff RCX: 0000000000000000
RDX: ffff888023beb980 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: ffffc900034a7cf0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000694f6c R12: ffffc90003497b18
R13: ffff88803945a608 R14: 00000000ffffffff R15: ffffc90003497ab8
 do_futex+0x395/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f758458ebe9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f75853850e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f75847b5fa8 RCX: 00007f758458ebe9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f75847b5fac
RBP: 00007f75847b5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: 000000000000000b R11: 0000000000000246 R12: 0000000000000000
R13: 00007f75847b6038 R14: 00007ffd2743c930 R15: 00007ffd2743ca18
 </TASK>
