rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10354 ticks this GP) idle=032/1/0x4000000000000000 softirq=19463/19465 fqs=5228 (t=10502 jiffies g=24189 q=405) NMI backtrace for cpu 0 CPU: 0 PID: 13202 Comm: syz-executor.5 Not tainted 5.10.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 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+0x1e3/0x21e kernel/rcu/tree_stall.h:331 print_cpu_stall kernel/rcu/tree_stall.h:563 [inline] check_cpu_stall kernel/rcu/tree_stall.h:637 [inline] rcu_pending kernel/rcu/tree.c:3694 [inline] rcu_sched_clock_irq.cold+0x472/0xee8 kernel/rcu/tree.c:2567 update_process_times+0x77/0xd0 kernel/time/timer.c:1709 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:1519 [inline] __hrtimer_run_queues+0x1ce/0xea0 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1097 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:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631 RIP: 0010:__rhashtable_lookup+0x2/0x780 include/linux/rhashtable.h:584 Code: 08 48 83 c4 08 44 89 e2 48 89 ef 5b 5d 41 5c ff e1 48 89 0c 24 e8 2e af 6d f9 48 8b 0c 24 eb de e8 33 af 6d f9 eb b2 90 41 57 <41> 56 41 55 41 54 55 53 48 bb 00 00 00 00 00 fc ff df 48 81 ec 50 RSP: 0018:ffffc90000007bc0 EFLAGS: 00000246 RAX: 0030004000060003 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0001000000000000 RSI: ffff8880231b485a RDI: ffff8880713615c8 RBP: ffff888029850c00 R08: 0000000000000000 R09: ffffffff8ebad667 R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000 R13: ffff888071360c80 R14: 1ffff92000000f80 R15: ffffc90000007d48 rhltable_lookup include/linux/rhashtable.h:688 [inline] sta_info_hash_lookup net/mac80211/sta_info.c:162 [inline] sta_info_get_bss+0x144/0x3f0 net/mac80211/sta_info.c:199 __ieee80211_rx_handle_packet net/mac80211/rx.c:4638 [inline] ieee80211_rx_list+0xdd3/0x23d0 net/mac80211/rx.c:4759 ieee80211_rx_napi+0xf7/0x3d0 net/mac80211/rx.c:4780 ieee80211_rx include/net/mac80211.h:4502 [inline] ieee80211_tasklet_handler+0xd3/0x130 net/mac80211/main.c:235 tasklet_action_common.constprop.0+0x22f/0x2d0 kernel/softirq.c:560 __do_softirq+0x2a0/0x9f6 kernel/softirq.c:298 asm_call_irq_on_stack+0xf/0x20 __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:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x132/0x200 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631 RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:4789 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 12 6d 64 f8 e8 ed d2 8e f8 fb bf 01 00 00 00 82 d1 ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 80 55 64 RSP: 0018:ffffc90016b9f8d8 EFLAGS: 00000206 RAX: 00000000007aa177 RBX: ffff8880299c1a40 RCX: ffffffff8155a947 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffed1005338348 R08: 0000000000000001 R09: ffffffff8ebad70f R10: fffffbfff1d75ae1 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 irqentry_exit_cond_resched kernel/entry/common.c:357 [inline] irqentry_exit_cond_resched kernel/entry/common.c:349 [inline] irqentry_exit+0x7a/0xa0 kernel/entry/common.c:387 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631 RIP: 0010:qlink_to_object mm/kasan/quarantine.c:137 [inline] RIP: 0010:qlink_free mm/kasan/quarantine.c:142 [inline] RIP: 0010:qlist_free_all+0x46/0xc0 mm/kasan/quarantine.c:168 Code: 49 be 00 00 00 00 00 ea ff ff 49 89 fd 49 bc 00 00 00 00 00 fc ff df eb 2d 48 63 87 c0 00 00 00 48 c7 c2 75 85 b1 81 4c 8b 3e <48> 29 c6 48 89 f0 48 c1 e8 03 42 c6 04 20 fb e8 f6 c6 ff ff 4d 85 RSP: 0018:ffffc90016b9f9a0 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000cc0 RCX: ffffea0001cd7400 RDX: ffffffff81b18575 RSI: ffff8880735d4000 RDI: ffff888010042140 RBP: 0000000000000000 R08: 0000000080070002 R09: ffffffff81b18575 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffc90016b9f9d8 R14: ffffea0000000000 R15: ffff8881450584c0 quarantine_reduce+0x17e/0x200 mm/kasan/quarantine.c:261 __kasan_kmalloc.constprop.0+0x9e/0xd0 mm/kasan/common.c:442 slab_post_alloc_hook mm/slab.h:526 [inline] slab_alloc_node mm/slub.c:2891 [inline] kmem_cache_alloc_node+0x13b/0x490 mm/slub.c:2927 __alloc_skb+0x71/0x550 net/core/skbuff.c:198 alloc_skb_fclone include/linux/skbuff.h:1144 [inline] sk_stream_alloc_skb+0x109/0xc30 net/ipv4/tcp.c:888 tcp_sendmsg_locked+0xbb7/0x2d20 net/ipv4/tcp.c:1295 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1444 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_sendto+0x21c/0x320 net/socket.c:1992 __do_sys_sendto net/socket.c:2004 [inline] __se_sys_sendto net/socket.c:2000 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2000 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45deb9 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:00007f44cf8b2c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000000000002e940 RCX: 000000000045deb9 RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000005 RBP: 000000000118bf78 R08: 0000000000000000 R09: 0000000009000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007fff72711a8f R14: 00007f44cf8b39c0 R15: 000000000118bf2c