rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10499 ticks this GP) idle=bde/1/0x4000000000000000 softirq=233837/233838 fqs=1 
	(t=10500 jiffies g=481481 q=89)
rcu: rcu_preempt kthread starved for 10498 jiffies! g481481 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:29584 pid:   10 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:3778 [inline]
 __schedule+0xec9/0x2280 kernel/sched/core.c:4527
 schedule+0xd0/0x2a0 kernel/sched/core.c:4602
 schedule_timeout+0x148/0x250 kernel/time/timer.c:1879
 rcu_gp_fqs_loop kernel/rcu/tree.c:1888 [inline]
 rcu_gp_kthread+0xb2c/0x1ca0 kernel/rcu/tree.c:2058
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
NMI backtrace for cpu 0
CPU: 0 PID: 9258 Comm: syz-executor.0 Not tainted 5.9.0-rc3-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:77 [inline]
 dump_stack+0x198/0x1fd lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x1e3/0x21e kernel/rcu/tree_stall.h:318
 print_cpu_stall kernel/rcu/tree_stall.h:551 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
 rcu_pending kernel/rcu/tree.c:3637 [inline]
 rcu_sched_clock_irq.cold+0x4db/0xdfd kernel/rcu/tree.c:2519
 update_process_times+0x25/0xa0 kernel/time/timer.c:1710
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
 tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328
 __run_hrtimer kernel/time/hrtimer.c:1524 [inline]
 __hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1588
 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1650
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x147/0x5f0 arch/x86/kernel/apic/apic.c:1097
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline]
 sysvec_apic_timer_interrupt+0x4c/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:deref_stack_regs arch/x86/kernel/unwind_orc.c:373 [inline]
RIP: 0010:unwind_next_frame+0x10ea/0x1f90 arch/x86/kernel/unwind_orc.c:550
Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 44 07 00 00 4d 89 67 40 e9 2a fd ff ff 48 8b 4c 24 60 ba a8 00 00 00 4c 89 ff <4c> 89 44 24 20 48 89 ce 48 89 4c 24 18 e8 94 ec ff ff 84 c0 0f 84
RSP: 0018:ffffc90000007640 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff92000000ed0 RCX: ffffc9000521f108
RDX: 00000000000000a8 RSI: 0000000000000000 RDI: ffffc90000007718
RBP: 0000000000000001 R08: ffffffff8c464984 R09: ffffffff8c464988
R10: 000000000007601f R11: 0000000000000001 R12: ffffc90000007760
R13: ffffc9000000774d R14: ffffc90000007768 R15: ffffc90000007718
 arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461
 slab_post_alloc_hook mm/slab.h:518 [inline]
 slab_alloc mm/slab.c:3312 [inline]
 kmem_cache_alloc+0x13a/0x3f0 mm/slab.c:3482
 __build_skb+0x21/0x60 net/core/skbuff.c:311
 __netdev_alloc_skb+0x244/0x450 net/core/skbuff.c:464
 netdev_alloc_skb include/linux/skbuff.h:2821 [inline]
 dev_alloc_skb include/linux/skbuff.h:2834 [inline]
 __ieee80211_beacon_get+0xebe/0x1af0 net/mac80211/tx.c:4819
 ieee80211_beacon_get_tim+0x88/0x910 net/mac80211/tx.c:4933
 ieee80211_beacon_get include/net/mac80211.h:4845 [inline]
 mac80211_hwsim_beacon_tx+0x111/0x810 drivers/net/wireless/mac80211_hwsim.c:1676
 __iterate_interfaces+0x124/0x4d0 net/mac80211/util.c:737
 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:773
 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1717
 __run_hrtimer kernel/time/hrtimer.c:1524 [inline]
 __hrtimer_run_queues+0x6a9/0xfc0 kernel/time/hrtimer.c:1588
 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1605
 __do_softirq+0x1f8/0xb23 kernel/softirq.c:298
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0x235/0x280 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:preempt_schedule_irq+0xba/0x1b0 kernel/sched/core.c:4785
Code: 89 f0 48 c1 e8 03 80 3c 18 00 0f 85 b9 00 00 00 48 83 3d a0 be d6 01 00 0f 84 a5 00 00 00 fb 66 0f 1f 44 00 00 bf 01 00 00 00 <e8> 21 ce ff ff 4c 89 e8 48 c1 e8 03 80 3c 18 00 0f 85 9a 00 00 00
RSP: 0018:ffffc9000521f0c8 EFLAGS: 00000286
RAX: 1ffffffff13f8d77 RBX: dffffc0000000000 RCX: 0000000000000006
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed10087e4c90 R08: 0000000000000001 R09: ffffffff8d0b6a9f
R10: fffffbfff1a16d53 R11: 0000000000000001 R12: ffff888043f26480
R13: ffffffff89fc6ba0 R14: ffffffff89fc6bb8 R15: 0000000000000000
 irqentry_exit_cond_resched kernel/entry/common.c:333 [inline]
 irqentry_exit_cond_resched kernel/entry/common.c:325 [inline]
 irqentry_exit+0x65/0x90 kernel/entry/common.c:363
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:lock_acquire+0x280/0xae0 kernel/locking/lockdep.c:4977
Code: 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 04 07 00 00 48 83 3d f8 6f a0 08 00 0f 84 5a 05 00 00 4c 89 ff 57 9d 0f 1f 44 00 00 <48> b8 00 00 00 00 00 fc ff df 48 03 44 24 08 48 c7 00 00 00 00 00
RSP: 0018:ffffc9000521f1b8 EFLAGS: 00000286
RAX: 1ffffffff13f8d75 RBX: ffff888043f26480 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 4f598863ac3f63df RDI: 0000000000000286
RBP: ffffffff8a067f40 R08: 0000000000000000 R09: ffffffff8d0b69e7
R10: fffffbfff1a16d3c R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000286
 rcu_lock_acquire include/linux/rcupdate.h:241 [inline]
 rcu_read_lock include/linux/rcupdate.h:634 [inline]
 is_bpf_text_address+0x36/0x160 kernel/bpf/core.c:704
 kernel_text_address kernel/extable.c:151 [inline]
 kernel_text_address+0xbd/0xf0 kernel/extable.c:120
 __kernel_text_address+0x9/0x30 kernel/extable.c:105
 unwind_get_return_address arch/x86/kernel/unwind_orc.c:317 [inline]
 unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:312
 arch_stack_walk+0x97/0xf0 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461
 slab_post_alloc_hook mm/slab.h:518 [inline]
 slab_alloc mm/slab.c:3312 [inline]
 kmem_cache_alloc_trace+0x13d/0x300 mm/slab.c:3548
 kmalloc include/linux/slab.h:554 [inline]
 kzalloc include/linux/slab.h:666 [inline]
 sctp_add_bind_addr+0x96/0x390 net/sctp/bind_addr.c:144
 sctp_copy_local_addr_list+0x33e/0x4e0 net/sctp/protocol.c:165
 sctp_copy_one_addr net/sctp/bind_addr.c:457 [inline]
 sctp_bind_addr_copy+0xde/0x460 net/sctp/bind_addr.c:56
 sctp_connect_new_asoc+0x1cd/0x770 net/sctp/socket.c:1078
 sctp_sendmsg_new_asoc net/sctp/socket.c:1676 [inline]
 sctp_sendmsg+0x1377/0x1cf0 net/sctp/socket.c:1986
 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:671
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2353
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2407
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2440
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e179
Code: 3d b2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 0b b2 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f129cbb9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000027c80 RCX: 000000000045e179
RDX: 0000000000000000 RSI: 00000000200006c0 RDI: 0000000000000007
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffd0c55e1cf R14: 00007f129cbba9c0 R15: 000000000118cf4c