rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10474 ticks this GP) idle=d7e/1/0x4000000000000000 softirq=89865/89893 fqs=7 
	(t=10500 jiffies g=163257 q=238)
rcu: rcu_preempt kthread starved for 10183 jiffies! g163257 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:28672 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x93a/0x26f0 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1878
 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: 15657 Comm: syz-executor.5 Tainted: G        W         5.14.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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:ffffc90000dc0a30 EFLAGS: 00000206
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 1ffffffff18ef508
RDX: 0000000000000001 RSI: ffffffff817bab31 RDI: ffffffff81330591
RBP: ffffffff8c77a840 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff817baaf9 R11: 0000000000000080 R12: 0000000000004bfb
R13: fffffbfff18ef508 R14: 0000000000000001 R15: ffff8880b9d52880
FS:  00007ff788494700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558756e2d620 CR3: 0000000088fb6000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 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]
 mac80211_hwsim_tx_frame_no_nl.isra.0+0x68f/0x1330 drivers/net/wireless/mac80211_hwsim.c:1516
 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
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:schedule_debug kernel/sched/core.c:5236 [inline]
RIP: 0010:__schedule+0x129/0x26f0 kernel/sched/core.c:5831
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e4 1e 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 7d 20 4c 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 0f 1f 00 00 49 81 3f 9d 6e ac 57 0f 85 91 25 00 00 49 8d 45
RSP: 0018:ffffc90001f3edd0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 1ffff920003e7dc2
RDX: 1ffff920003e7000 RSI: 0000000000000001 RDI: ffff88807e50b8a0
RBP: ffffc90001f3ee98 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff817bab18 R11: 0000000000000001 R12: ffff8880b9d51a80
R13: ffff88807e50b880 R14: 0000000000051a80 R15: ffffc90001f38000
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6328
 irqentry_exit+0x31/0x80 kernel/entry/common.c:427
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:cfg80211_rdev_by_wiphy_idx+0x91/0x140 net/wireless/core.c:64
Code: 00 49 8b 44 24 08 4c 8d 60 f8 48 3d c0 65 3c 8d 74 53 e8 52 72 17 f9 49 8d bc 24 8c 00 00 00 48 89 f8 48 c1 e8 03 0f b6 14 28 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 81 00 00 00 45
RSP: 0018:ffffc90001f3ef78 EFLAGS: 00000a07
RAX: 1ffff1100c0a5011 RBX: 0000000000000000 RCX: ffffc900149b6000
RDX: 0000000000000000 RSI: ffffffff885e156e RDI: ffff88806052808c
RBP: dffffc0000000000 R08: 000000000000046a R09: ffffffff8d0c9347
R10: ffffffff885e15a8 R11: 0000000000000000 R12: ffff888060528000
R13: 000000000000046a R14: ffff88808b073c14 R15: 0000000000565d60
 wiphy_idx_to_wiphy+0x2c/0x90 net/wireless/core.c:86
 handle_channel net/wireless/reg.c:1945 [inline]
 handle_band net/wireless/reg.c:2033 [inline]
 wiphy_update_regulatory+0x441/0x29d0 net/wireless/reg.c:2460
 wiphy_regulatory_register+0xa7/0x1c0 net/wireless/reg.c:4052
 wiphy_register+0x1ffe/0x29b0 net/wireless/core.c:942
 ieee80211_register_hw+0x1f3c/0x3ef0 net/mac80211/main.c:1300
 mac80211_hwsim_new_radio+0x20ce/0x4990 drivers/net/wireless/mac80211_hwsim.c:3358
 hwsim_new_radio_nl+0x9bc/0x1080 drivers/net/wireless/mac80211_hwsim.c:3924
 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739
 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
 genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:703 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:723
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2392
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2446
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2475
 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:00007ff788494188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fffb6fedf7f R14: 00007ff788494300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 15675 Comm: syz-executor.4 Tainted: G        W         5.14.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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:1782
 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+0x78f/0x1330 drivers/net/wireless/mac80211_hwsim.c:1527
Code: 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 44 89 fe e8 77 b7 43 fc 45 84 ff 0f 84 77 ff ff ff e8 29 b1
RSP: 0018:ffffc90000007ba0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88807c683260 RCX: 0000000000000100
RDX: 0000000000000004 RSI: ffffffff8531d653 RDI: ffff88807c686f0c
RBP: dffffc0000000000 R08: 0000000000000004 R09: 0000000000000000
R10: ffffffff8531d689 R11: 0000000000000000 R12: ffff8880880fbdc0
R13: ffff88807f61b490 R14: ffff88807f61b260 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
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:schedule_debug kernel/sched/core.c:5256 [inline]
RIP: 0010:__schedule+0x134a/0x26f0 kernel/sched/core.c:5831
Code: 7b 08 4c 89 f9 4c 89 ea 8b b5 4c ff ff ff e8 ad 86 50 f8 65 ff 0d f6 e0 d6 76 0f 85 52 f1 ff ff e8 6a 36 d5 f7 e9 48 f1 ff ff <e8> 31 92 fe ff 85 c0 0f 84 68 ee ff ff 80 3d 0e 9c 2c 04 00 0f 85
RSP: 0018:ffffc900024ef5a0 EFLAGS: 00000286
RAX: 00000000ffffffff RBX: 0000000000000001 RCX: 0000000000000000
RDX: 1ffff9200049d000 RSI: 00000000ffffffff RDI: ffffffff8b97b840
RBP: ffffc900024ef668 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff817bab18 R11: 0000000000000001 R12: ffff8880b9c51a80
R13: ffff88806a6e3880 R14: 0000000000051a80 R15: ffffc900024e8000
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6328
 irqentry_exit+0x31/0x80 kernel/entry/common.c:427
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__should_fail_alloc_page mm/page_alloc.c:3778 [inline]
RIP: 0010:should_fail_alloc_page+0x6/0x60 mm/page_alloc.c:3825
Code: e8 8f 8d 0a 00 e9 26 ff ff ff 4c 89 ef e8 82 8d 0a 00 e9 9d fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 3b 35 ee ad f8 09 <72> 51 f7 c7 00 80 00 00 75 49 80 3d d9 ad f8 09 00 89 f1 74 06 40
RSP: 0018:ffffc900024ef740 EFLAGS: 00000206
RAX: 0000000000404140 RBX: ffffc900024ef800 RCX: 1ffff9200049df03
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 00000000000528c0
RBP: 0000000000000003 R08: ffffc900024ef800 R09: ffffc900024ef7f0
R10: ffffffff81b864f6 R11: 0000000000000001 R12: 0000000000000000
R13: 00000000000528c0 R14: ffffc900024ef808 R15: 0000000000000000
 prepare_alloc_pages+0x17b/0x580 mm/page_alloc.c:5169
 __alloc_pages+0x12f/0x500 mm/page_alloc.c:5363
 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2244
 skb_page_frag_refill net/core/sock.c:2592 [inline]
 skb_page_frag_refill+0x262/0x570 net/core/sock.c:2576
 sk_page_frag_refill+0x4a/0x1d0 net/core/sock.c:2612
 tcp_sendmsg_locked+0xf9d/0x2f10 net/ipv4/tcp.c:1344
 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1461
 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:821
 sock_sendmsg_nosec net/socket.c:703 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:723
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2392
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2446
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2475
 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:00007fce81eec188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 000000000007ffff RSI: 0000000020000680 RDI: 0000000000000004
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffcf2f73adf R14: 00007fce81eec300 R15: 0000000000022000