rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10500 ticks this GP) idle=de64/1/0x4000000000000000 softirq=39140/39176 fqs=228
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1033318        109            0
rcu: 	cputime:    29506      22812           46   ==> 52320(ms)
rcu: 	(t=10500 jiffies g=27201 q=2505 ncpus=2)
rcu: rcu_preempt kthread starved for 202 jiffies! g27201 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:27360 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x14bc/0x5000
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x599/0xb30
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 10131 Comm: syz.7.1639 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:__lock_acquire+0x828/0x2cf0
Code: 39 c7 7c d3 e9 b4 00 00 00 48 c7 c7 90 1f e1 8d 4c 89 fe e8 6a 9b 29 03 eb c3 89 e8 25 ff 1f 00 00 c1 ed 03 81 e5 00 60 00 00 <09> c5 48 89 d8 48 c1 e8 20 29 c5 89 c1 c1 c1 04 31 e9 01 d8 29 cb
RSP: 0000:ffffc90000006c08 EFLAGS: 00000006
RAX: 0000000000000007 RBX: 0ac0d5affe09d4ff RCX: 0000000000000000
RDX: 0000000000000008 RSI: ffff88816b12c6f0 RDI: ffff88816b12ba80
RBP: 0000000000004000 R08: ffffffff81743f85 R09: ffffffff8df41a20
R10: ffffc90000006f70 R11: fffff52000000df0 R12: ffff88816b12c6f0
R13: ffff88816b12c6f0 R14: ffff88816b12ba80 R15: 0000000000000008
FS:  00007f3a8d4446c0(0000) GS:ffff88818e835000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc2ed1b6360 CR3: 000000002233e000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lock_acquire+0x117/0x340
 unwind_next_frame+0xc2/0x23d0
 perf_callchain_kernel+0x3ac/0x600
 get_perf_callchain+0x23c/0x820
 perf_callchain+0x2a7/0x350
 perf_prepare_sample+0x31f/0x2250
 perf_event_output_forward+0x151/0x430
 __perf_event_overflow+0x845/0xe70
 perf_swevent_hrtimer+0x3fc/0x570
 __hrtimer_run_queues+0x4d0/0xc30
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x102/0x3e0
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:skb_release_data+0x3a5/0x7c0
Code: f1 01 00 00 e8 0c d5 8f f8 48 bb 00 00 00 00 00 fc ff df 48 8b 6c 24 08 45 84 f6 0f 85 4a 02 00 00 e8 ef d4 8f f8 4c 8d 65 02 <4c> 89 e0 48 c1 e8 03 48 89 44 24 20 0f b6 04 18 84 c0 0f 85 fe 02
RSP: 0000:ffffc90000007ac8 EFLAGS: 00000246
RAX: ffffffff8931db9b RBX: dffffc0000000000 RCX: ffff88816b12ba80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888022031680 R08: ffffffff8f821f77 R09: 1ffffffff1f043ee
R10: dffffc0000000000 R11: fffffbfff1f043ef R12: ffff888022031682
R13: 1ffff11007039d69 R14: 0000000000000000 R15: ffff8880381cea80
 consume_skb+0x9e/0xf0
 mac80211_hwsim_beacon_tx+0x3e8/0x870
 __iterate_interfaces+0x2ab/0x590
 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180
 mac80211_hwsim_beacon+0xbb/0x180
 __hrtimer_run_queues+0x51c/0xc30
 hrtimer_run_softirq+0x187/0x2b0
 handle_softirqs+0x27d/0x850
 __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:lock_release+0x2a6/0x3b0
Code: 4d 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 52 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 ba 06 e0 10 <48> 3b 44 24 28 75 75 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3
RSP: 0000:ffffc9000872fab8 EFLAGS: 00000206
RAX: 9b0f33800dd1f000 RBX: 0000000000000202 RCX: 9b0f33800dd1f000
RDX: 0000000000000004 RSI: ffffffff8d97916f RDI: ffffffff8bc082e0
RBP: ffff88816b12c678 R08: ffffc9000872f8f8 R09: 0000000000000020
R10: 0000000000000000 R11: ffffffff819ee780 R12: 0000000000000006
R13: 0000000000000006 R14: ffffffff8df41a20 R15: ffff88816b12ba80
 lock_list_lru_of_memcg+0x3f6/0x4c0
 list_lru_add+0x58/0x270
 list_lru_add_obj+0x191/0x270
 d_lru_add+0xd6/0x160
 fast_dput+0x303/0x430
 dput+0xe8/0x1a0
 lookup_one_qstr_excl+0x1ce/0x360
 filename_create+0x209/0x360
 do_mkdirat+0xca/0x4b0
 __x64_sys_mkdir+0x6c/0x80
 do_syscall_64+0xfa/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3a8c58f7c9
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:00007f3a8d444038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f3a8c7e6090 RCX: 00007f3a8c58f7c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000000
RBP: 00007f3a8c5f297f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3a8c7e6128 R14: 00007f3a8c7e6090 R15: 00007ffe14da80d8
 </TASK>
CPU: 1 UID: 0 PID: 10123 Comm: syz.8.1637 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:fixup_red_left+0x4/0x30
Code: 5e 41 5f c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 <48> 89 f0 66 90 e9 02 30 42 09 cc f3 0f 1e fa f6 47 20 02 74 f0 8b
RSP: 0018:ffffc90000a07980 EFLAGS: 00000246
RAX: 0000000000001e00 RBX: ffff888174dede00 RCX: ffffea0005d37b00
RDX: 0000000000000050 RSI: ffff888174dede00 RDI: ffff888103717000
RBP: ffffc90000a07ad0 R08: ffffffff81761328 R09: ffffffff8df41ae0
R10: dffffc0000000000 R11: fffffbfff1f043ef R12: dffffc0000000000
R13: 1ffff92000140f44 R14: ffff888103717000 R15: 0000000000000000
FS:  00007fa4ac5f66c0(0000) GS:ffff8882a9e35000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffffd CR3: 00000001b6056000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 kasan_record_aux_stack+0x9a/0xd0
 call_rcu+0x157/0x9c0
 __dev_queue_xmit+0x4ac/0x3140
 br_dev_queue_push_xmit+0x6c5/0x890
 NF_HOOK+0x320/0x3c0
 br_forward_finish+0xd3/0x130
 NF_HOOK+0x320/0x3c0
 __br_forward+0x41e/0x600
 br_dev_xmit+0x11b3/0x1840
 dev_hard_start_xmit+0x2cd/0x800
 __dev_queue_xmit+0x1493/0x3140
 ip6_finish_output2+0xfb3/0x1480
 ip6_output+0x340/0x550
 ndisc_send_skb+0xbce/0x1510
 addrconf_rs_timer+0x369/0x6a0
 call_timer_fn+0x16e/0x590
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x27d/0x850
 __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:generic_exec_single+0x481/0x500
Code: 75 11 e8 02 a6 0b 00 48 85 db 75 16 e8 f8 a5 0b 00 eb 15 e8 f1 a5 0b 00 e8 ac b5 a5 09 48 85 db 74 ea e8 e2 a5 0b 00 fb 31 c0 <48> c7 44 24 20 0e 36 e0 45 4b c7 04 2c 00 00 00 00 66 43 c7 44 2c
RSP: 0018:ffffc9000836f9e0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc9000b473000 RSI: 000000000000030b RDI: 000000000000030c
RBP: ffffc9000836fab0 R08: ffffffff8f821f77 R09: 1ffffffff1f043ee
R10: dffffc0000000000 R11: fffffbfff1f043ef R12: 1ffff9200106df40
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff9200106df61
 smp_call_function_single+0x351/0x590
 perf_install_in_context+0x593/0x8f0
 __se_sys_perf_event_open+0x1966/0x1d90
 do_syscall_64+0xfa/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa4ae38f7c9
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:00007fa4ac5f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fa4ae5e5fa0 RCX: 00007fa4ae38f7c9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000440
RBP: 00007fa4ae3f297f R08: 0000000000000003 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa4ae5e6038 R14: 00007fa4ae5e5fa0 R15: 00007ffe0a2d6cb8
 </TASK>
