rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (9713 ticks this GP) idle=54a/1/0x4000000000000000 softirq=21765/21767 fqs=5073 
	(t=10500 jiffies g=28417 q=230)
NMI backtrace for cpu 0
CPU: 0 PID: 13376 Comm: syz-executor.1 Not tainted 5.11.0-rc5-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:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 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+0x1f4/0x230 kernel/rcu/tree_stall.h:337
 print_cpu_stall kernel/rcu/tree_stall.h:569 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:643 [inline]
 rcu_pending kernel/rcu/tree.c:3751 [inline]
 rcu_sched_clock_irq.cold+0x48e/0xedf kernel/rcu/tree.c:2580
 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:1369
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1102
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline]
 sysvec_apic_timer_interrupt+0x48/0x100 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629
RIP: 0010:find_stack lib/stackdepot.c:184 [inline]
RIP: 0010:stack_depot_save+0x10d/0x4e0 lib/stackdepot.c:256
Code: df 41 81 e7 ff ff 0f 00 4e 8b 34 fd 60 a4 32 8f 4d 85 f6 75 11 e9 b2 00 00 00 4d 8b 36 4d 85 f6 0f 84 a6 00 00 00 41 39 5e 08 <75> ee 45 3b 66 0c 75 e8 31 c0 49 8b 4c c6 18 48 39 4c c5 00 75 da
RSP: 0018:ffffc900000078a8 EFLAGS: 00000246
RAX: 000000007f8dfdab RBX: 00000000240fad6a RCX: 0000000000000001
RDX: 00000000e60006a2 RSI: 0000000000082a20 RDI: 00000000de8ee466
RBP: ffffc90000007918 R08: 00000000718f488b R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 000000000000000b
R13: 000000000000000b R14: ffff88801ffd3270 R15: 00000000000fad6a
 kasan_save_stack+0x32/0x40 mm/kasan/common.c:40
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:401 [inline]
 ____kasan_kmalloc.constprop.0+0x82/0xa0 mm/kasan/common.c:429
 kasan_slab_alloc include/linux/kasan.h:209 [inline]
 slab_post_alloc_hook mm/slab.h:512 [inline]
 slab_alloc_node mm/slub.c:2892 [inline]
 __kmalloc_node_track_caller+0x1e0/0x3f0 mm/slub.c:4496
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0xae/0x5a0 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1099 [inline]
 ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:420
 ndisc_send_rs+0x388/0x700 net/ipv6/ndisc.c:686
 addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3875
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417
 expire_timers kernel/time/timer.c:1462 [inline]
 __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731
 __run_timers kernel/time/timer.c:1712 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744
 __do_softirq+0x2bc/0xa29 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:226 [inline]
 __irq_exit_rcu kernel/softirq.c:420 [inline]
 irq_exit_rcu+0x134/0x200 kernel/softirq.c:432
 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629
RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:5340
Code: 55 53 65 48 8b 1c 25 00 f0 01 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 52 44 52 f8 e8 2d 49 7d f8 fb bf 01 00 00 00 <e8> 02 d1 ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 60 32 52
RSP: 0018:ffffc900077cf868 EFLAGS: 00000202
RAX: 0000000000f287d9 RBX: ffff88802b648000 RCX: ffffffff81584047
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed10056c9000 R08: 0000000000000001 R09: ffffffff8ed31857
R10: fffffbfff1da630a R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 irqentry_exit_cond_resched kernel/entry/common.c:393 [inline]
 irqentry_exit_cond_resched kernel/entry/common.c:385 [inline]
 irqentry_exit+0x7a/0xa0 kernel/entry/common.c:423
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629
RIP: 0010:do_slab_free mm/slub.c:3111 [inline]
RIP: 0010:___cache_free+0xa3/0x4b0 mm/slub.c:3150
Code: a8 01 4c 0f 45 c2 4d 8b 68 38 4d 85 ed 75 60 49 8b 0c 24 65 48 8b 51 08 48 89 c8 65 48 03 05 ac 48 4c 7e 48 8b 70 08 48 39 f2 <75> e7 48 39 68 10 0f 85 c1 03 00 00 48 8b 00 41 8b 4c 24 28 48 89
RSP: 0018:ffffc900077cf930 EFLAGS: 00000246
RAX: ffff8880b9e3c3a0 RBX: ffff888018fb6500 RCX: 000000000003c3a0
RDX: 00000000002e1eb8 RSI: 00000000002e1eb8 RDI: 0000000000000003
RBP: ffffea000063ed80 R08: 0000000000000000 R09: 0000000000000030
R10: ffffffff8132e02a R11: 000000000000003f R12: ffff888010cc4c80
R13: ffffc900077cf9c8 R14: ffffea0000000000 R15: ffff888054236000
 qlink_free mm/kasan/quarantine.c:146 [inline]
 qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165
 quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
 ____kasan_kmalloc.constprop.0+0x98/0xa0 mm/kasan/common.c:412
 kasan_slab_alloc include/linux/kasan.h:209 [inline]
 slab_post_alloc_hook mm/slab.h:512 [inline]
 slab_alloc_node mm/slub.c:2892 [inline]
 __kmalloc_node_track_caller+0x1e0/0x3f0 mm/slub.c:4496
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0xae/0x5a0 net/core/skbuff.c:210
 alloc_skb_fclone include/linux/skbuff.h:1149 [inline]
 sk_stream_alloc_skb+0x109/0xc30 net/ipv4/tcp.c:888
 tcp_sendmsg_locked+0xc00/0x2d90 net/ipv4/tcp.c:1310
 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1459
 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 __sys_sendto+0x21c/0x320 net/socket.c:1975
 __do_sys_sendto net/socket.c:1987 [inline]
 __se_sys_sendto net/socket.c:1983 [inline]
 __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1983
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
Code: 0d b4 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f1b3fda8c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000000045e219
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000005
RBP: 000000000119bfd8 R08: 0000000000000000 R09: 0000000009000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007fffa68b44bf R14: 00007f1b3fda99c0 R15: 000000000119bf8c