watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:21373] Modules linked in: irq event stamp: 4810767 hardirqs last enabled at (4810766): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (4810767): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (0): [] copy_process.part.0+0x15b9/0x8260 kernel/fork.c:1855 softirqs last disabled at (339): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (339): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 21373 Comm: syz-executor.4 Not tainted 4.19.190-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa3/0xe0 kernel/locking/spinlock.c:184 Code: 48 c7 c0 48 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 2f 48 83 3d 0c 88 d9 01 00 74 15 48 89 df 57 9d <0f> 1f 44 00 00 eb b2 e8 cb 42 e8 f8 eb c0 0f 0b 0f 0b 48 c7 c7 48 RSP: 0018:ffff8880ba007cb0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3049 RBX: 0000000000000282 RCX: 1ffff1100294b19d RDX: dffffc0000000000 RSI: ffff888014a58cc8 RDI: 0000000000000282 RBP: ffff88801b104130 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88801b104130 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f1cdfba8700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000022d75f000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:384 [inline] skb_dequeue+0x125/0x180 net/core/skbuff.c:2836 mrp_queue_xmit net/802/mrp.c:353 [inline] mrp_join_timer+0x97/0xc0 net/802/mrp.c:598 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:535 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:get_lock_parent_ip include/linux/ftrace.h:696 [inline] RIP: 0010:preempt_latency_start kernel/sched/core.c:3216 [inline] RIP: 0010:preempt_count_add+0xaf/0x190 kernel/sched/core.c:3241 Code: 0f b6 c0 3d f4 00 00 00 7f 64 65 8b 05 8a 73 c0 7e 25 ff ff ff 7f 39 c5 74 03 5b 5d c3 48 8b 5c 24 10 48 89 df e8 d1 f7 09 00 <85> c0 75 35 65 48 8b 2c 25 80 df 01 00 48 8d bd 38 12 00 00 48 b8 RSP: 0018:ffff8882225978f0 EFLAGS: 00000283 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffffffff81298225 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 1ffff110444b2f60 RDI: ffffffff81298225 RBP: 0000000000000001 R08: 0000000000000000 R09: ffff888222597b18 R10: ffff888222597b4f R11: 0000000048372899 R12: ffff888222597b38 R13: ffffed10444b2f60 R14: ffff888222597af0 R15: ffff888222597af0 unwind_next_frame+0x135/0x1400 arch/x86/kernel/unwind_orc.c:407 __unwind_start+0x5b8/0x960 arch/x86/kernel/unwind_orc.c:667 unwind_start arch/x86/include/asm/unwind.h:60 [inline] __save_stack_trace+0x72/0x190 arch/x86/kernel/stacktrace.c:43 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 kmem_cache_alloc+0x122/0x370 mm/slab.c:3559 getname_flags+0xce/0x590 fs/namei.c:140 do_sys_open+0x26c/0x520 fs/open.c:1079 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 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:00007f1cdfba8188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 0000000020000100 RDI: ffffffffffffff9c RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffc5a6a155f R14: 00007f1cdfba8300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 21340 Comm: syz-executor.4 Not tainted 4.19.190-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1076 [inline] RIP: 0010:rcu_lockdep_current_cpu_online+0x20/0x1b0 kernel/rcu/tree.c:1068 Code: 8b e8 c4 03 47 00 eb cd 66 90 65 8b 05 59 c1 b0 7e a9 00 00 10 00 75 0a 8b 05 b0 c9 d5 09 85 c0 75 06 b8 01 00 00 00 c3 41 55 01 00 00 00 41 54 55 53 48 83 ec 08 e8 0e 4d f0 ff 48 8b 05 f7 RSP: 0000:ffff8880ba107710 EFLAGS: 00000002 RAX: 0000000000000001 RBX: ffffffff8a45ea40 RCX: ffffffff81516bc3 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880ba122a90 RBP: ffff888010d6e380 R08: 0000000000000000 R09: ffffed1017424552 R10: ffff8880ba122a93 R11: ffffffff8c66305b R12: ffff88821b44ff58 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f1cdfbc9700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000022d75f000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock_sched_held+0xd3/0x1d0 kernel/rcu/update.c:115 trace_local_timer_entry arch/x86/include/asm/trace/irq_vectors.h:56 [inline] smp_apic_timer_interrupt+0x3fb/0x550 arch/x86/kernel/apic/apic.c:1095 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__save_stack_trace+0xb2/0x190 arch/x86/kernel/stacktrace.c:45 Code: 54 24 08 8d 48 01 41 89 0c 24 48 89 1c c2 48 8d 7d 80 e8 81 9b 06 00 8b 45 80 85 c0 74 37 48 8d 7d 80 e8 11 97 06 00 48 85 c0 <48> 89 c3 74 26 45 84 ed 75 5a 41 8b 44 24 10 85 c0 7e b6 48 8d 7d RSP: 0000:ffff8880ba107828 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffffffff8820145f RCX: 1ffff110021add8b RDX: dffffc0000000000 RSI: 0000000000000003 RDI: 0000000000000282 RBP: ffff8880ba1078b8 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000074071 R12: ffff8880ba1078d0 R13: 0000000000000000 R14: ffff88813bff0940 R15: 0000000000000200 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc_node mm/slab.c:3340 [inline] kmem_cache_alloc_node_trace+0x13c/0x3b0 mm/slab.c:3666 __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 __netdev_alloc_skb+0x76/0x460 net/core/skbuff.c:407 netdev_alloc_skb include/linux/skbuff.h:2680 [inline] dev_alloc_skb include/linux/skbuff.h:2693 [inline] __ieee80211_beacon_get+0xc7d/0x1a30 net/mac80211/tx.c:4332 ieee80211_beacon_get_tim+0x88/0x890 net/mac80211/tx.c:4443 ieee80211_beacon_get include/net/mac80211.h:4484 [inline] mac80211_hwsim_beacon_tx+0xff/0x680 drivers/net/wireless/mac80211_hwsim.c:1577 __iterate_interfaces+0x2e1/0x4a0 net/mac80211/util.c:614 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:650 mac80211_hwsim_beacon+0xc9/0x190 drivers/net/wireless/mac80211_hwsim.c:1615 __tasklet_hrtimer_trampoline+0x29/0xa0 kernel/softirq.c:601 tasklet_action_common.constprop.0+0x265/0x360 kernel/softirq.c:522 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:535 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0033:0x4665f9 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:00007f1cdfbc9218 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: 000000000056bf68 RCX: 00000000004665f9 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 000000000056bf6c RBP: 000000000056bf60 R08: 000000000000000e R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056bf6c R13: 00007ffc5a6a155f R14: 00007f1cdfbc9300 R15: 0000000000022000