rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (9015 ticks this GP) idle=f1a/1/0x4000000000000000 softirq=10983/10983 fqs=4676 (t=10500 jiffies g=9661 q=585) NMI backtrace for cpu 0 CPU: 0 PID: 9407 Comm: syz-executor645 Not tainted 5.10.0-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:unwind_next_frame+0x190/0x1f90 arch/x86/kernel/unwind_orc.c:443 Code: 15 00 00 41 f6 85 88 00 00 00 03 0f 85 71 02 00 00 4d 8d 6f 35 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 0f b6 04 02 <4c> 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 39 0a 00 00 4c 89 e1 41 RSP: 0018:ffffc90000007670 EFLAGS: 00000213 RAX: 0000000000000000 RBX: 1ffff92000000ed6 RCX: 1ffffffff1de7b24 RDX: 1ffff92000000eef RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000002 R08: ffffffff8d6db4aa R09: 0000000000000001 R10: 0000000000082081 R11: 0000000000000001 R12: ffffc90000007790 R13: ffffc9000000777d R14: ffffc90000007798 R15: ffffc90000007748 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:535 [inline] slab_alloc_node mm/slub.c:2891 [inline] kmem_cache_alloc_node+0x1e0/0x470 mm/slub.c:2927 __alloc_skb+0x71/0x550 net/core/skbuff.c:198 skb_copy+0x137/0x2f0 net/core/skbuff.c:1507 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb17/0x1330 drivers/net/wireless/mac80211_hwsim.c:1493 mac80211_hwsim_tx_frame+0x14f/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1705 mac80211_hwsim_beacon_tx+0x4ba/0x910 drivers/net/wireless/mac80211_hwsim.c:1759 __iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1782 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x693/0xea0 kernel/time/hrtimer.c:1583 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1600 __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:__sanitizer_cov_trace_const_cmp8+0x4/0x20 kernel/kcov.c:290 Code: 84 00 00 00 00 00 48 8b 0c 24 89 f2 89 fe bf 05 00 00 00 e9 ae fe ff ff 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 48 8b 0c 24 <48> 89 f2 48 89 fe bf 07 00 00 00 e9 8c fe ff ff 66 90 66 2e 0f 1f RSP: 0018:ffffc90001b579a8 EFLAGS: 00000256 RAX: 0000000000000005 RBX: 0000000000000000 RCX: ffffffff8130c470 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8880a9005e80 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880a9005e80 R11: 0000000000000000 R12: 0000000029005e80 R13: ffff8880101c3640 R14: ffff888029005e80 R15: 0000000000000246 __phys_addr+0x90/0x110 arch/x86/mm/physaddr.c:28 virt_to_head_page include/linux/mm.h:858 [inline] __kasan_slab_free+0x19/0x140 mm/kasan/common.c:399 slab_free_hook mm/slub.c:1544 [inline] slab_free_freelist_hook+0x5d/0x150 mm/slub.c:1577 slab_free mm/slub.c:3142 [inline] kmem_cache_free+0x82/0x350 mm/slub.c:3158 mmdrop include/linux/sched/mm.h:49 [inline] finish_task_switch+0x4ab/0x780 kernel/sched/core.c:3637 context_switch kernel/sched/core.c:3782 [inline] __schedule+0x89b/0x2130 kernel/sched/core.c:4528 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:4789 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:lock_release+0x3d5/0x710 kernel/locking/lockdep.c:5445 Code: 15 02 00 00 48 c7 c7 40 5f 4b 89 e8 95 4d 8f 07 b8 ff ff ff ff 65 0f c1 05 28 d8 ab 7e 83 f8 01 0f 85 67 01 00 00 ff 34 24 9d <48> b8 00 00 00 00 00 fc ff df 48 01 c5 48 c7 45 00 00 00 00 00 c7 RSP: 0018:ffffc90001b57c80 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffffffffffffffff RCX: ffffc90001b57cd0 RDX: 1ffff110044efaf9 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 1ffff9200036af92 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000001 R14: ffff88802277d7d0 R15: ffff88802277cec0 up_write+0x78/0x560 kernel/locking/rwsem.c:1583 inode_unlock include/linux/fs.h:779 [inline] perf_fasync+0x88/0xb0 kernel/events/core.c:6230 setfl fs/fcntl.c:73 [inline] do_fcntl+0x667/0x1070 fs/fcntl.c:347 __do_sys_fcntl fs/fcntl.c:463 [inline] __se_sys_fcntl fs/fcntl.c:448 [inline] __x64_sys_fcntl+0x165/0x1e0 fs/fcntl.c:448 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4429f9 Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 cb 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffe5a3291f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000048 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004429f9 RDX: 0000000000042000 RSI: 0000000000000004 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000002100000000 R09: 0000002100000000 R10: 0000002100000000 R11: 0000000000000246 R12: 00000000000d67d1 R13: 00000000006d3dc8 R14: 00000000006d4440 R15: 0000000000000004