watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [syz-executor.0:9558] Modules linked in: irq event stamp: 6214127 hardirqs last enabled at (6214126): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (6214127): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (6202924): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (6202927): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 9558 Comm: syz-executor.0 Not tainted 5.10.159 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:30 [inline] RIP: 0010:__orc_find+0x6f/0xf0 arch/x86/kernel/unwind_orc.c:52 Code: 72 4d 4c 89 e0 48 29 e8 48 89 c2 48 c1 e8 3f 48 c1 fa 02 48 01 d0 48 d1 f8 48 8d 5c 85 00 48 89 d8 48 c1 e8 03 42 0f b6 14 38 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 50 48 63 03 48 01 RSP: 0018:ffff88806cf09828 EFLAGS: 00000213 RAX: 1ffffffff0b262d9 RBX: ffffffff859316cc RCX: ffffffff83e078d2 RDX: 0000000000000000 RSI: ffffffff85d2b404 RDI: ffffffff859316b8 RBP: ffffffff859316b8 R08: ffffffff85d2b404 R09: ffffffff85d2b446 R10: 0000000000032042 R11: 1ffff1100d9e1316 R12: ffffffff859316e0 R13: ffffffff859316b8 R14: ffffffff859316b8 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556107c58 CR3: 000000000d9ac000 CR4: 0000000000350ee0 Call Trace: orc_find arch/x86/kernel/unwind_orc.c:178 [inline] unwind_next_frame+0x2b3/0x1a90 arch/x86/kernel/unwind_orc.c:448 arch_stack_walk+0x83/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 __save_stack_trace mm/kmemleak.c:563 [inline] create_object.isra.0+0x372/0xa20 mm/kmemleak.c:618 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] slab_post_alloc_hook mm/slab.h:534 [inline] slab_alloc_node mm/slub.c:2896 [inline] kmem_cache_alloc_node+0x169/0x370 mm/slub.c:2932 __alloc_skb+0x6d/0x620 net/core/skbuff.c:198 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:446 netdev_alloc_skb include/linux/skbuff.h:2836 [inline] dev_alloc_skb include/linux/skbuff.h:2849 [inline] __ieee80211_beacon_get+0x3af/0x13a0 net/mac80211/tx.c:4874 ieee80211_beacon_get_tim+0x88/0x910 net/mac80211/tx.c:4988 ieee80211_beacon_get include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x111/0x8f0 drivers/net/wireless/mac80211_hwsim.c:1740 __iterate_interfaces+0x1f0/0x530 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x72/0x180 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1793 __run_hrtimer kernel/time/hrtimer.c:1583 [inline] __hrtimer_run_queues+0x5e8/0xb50 kernel/time/hrtimer.c:1647 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1664 __do_softirq+0x1b8/0x86b kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __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+0x80/0xa0 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+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:lock_page_memcg+0x97/0x260 mm/memcontrol.c:2153 Code: 0f 84 e4 00 00 00 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 7b 38 4c 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 97 01 00 00 <4d> 89 fd 4c 8b 63 38 49 be 00 00 00 00 00 fc ff df 49 c1 ed 03 4d RSP: 0018:ffff888046c5f6f0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffea0000d35640 RCX: 000000005eb62b4a RDX: 1ffffd40001a6acf RSI: 1c55405fd88a67ed RDI: ffff88806cf3c128 RBP: ffffea0000d35640 R08: 0000000000000000 R09: ffffffff86795667 R10: 0000000000000246 R11: 0000000000000001 R12: 0000000000000000 R13: ffffea0000d35648 R14: dffffc0000000000 R15: ffffea0000d35678 page_remove_rmap+0x21/0x7c0 mm/rmap.c:1328 zap_pte_range mm/memory.c:1287 [inline] zap_pmd_range mm/memory.c:1404 [inline] zap_pud_range mm/memory.c:1433 [inline] zap_p4d_range mm/memory.c:1454 [inline] unmap_page_range+0x1119/0x1ea0 mm/memory.c:1475 unmap_single_vma+0x198/0x300 mm/memory.c:1520 unmap_vmas+0x16d/0x300 mm/memory.c:1552 exit_mmap+0x27f/0x4f0 mm/mmap.c:3235 __mmput kernel/fork.c:1089 [inline] mmput+0xca/0x340 kernel/fork.c:1110 exit_mm kernel/exit.c:487 [inline] do_exit+0xb21/0x2740 kernel/exit.c:798 do_group_exit+0x125/0x310 kernel/exit.c:908 get_signal+0x469/0x2210 kernel/signal.c:2748 arch_do_signal+0x8c/0x1c60 arch/x86/kernel/signal.c:805 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0xf7/0x160 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f11cb4abb19 Code: Unable to access opcode bytes at RIP 0x7f11cb4abaef. RSP: 002b:00007f11c8a21218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f11cb5bef68 RCX: 00007f11cb4abb19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f11cb5bef68 RBP: 00007f11cb5bef60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f11cb5bef6c R13: 00007ffcdf682e0f R14: 00007f11c8a21300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 9584 Comm: syz-executor.1 Not tainted 5.10.159 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:hlock_class kernel/locking/lockdep.c:191 [inline] RIP: 0010:mark_lock+0xb0/0x2df0 kernel/locking/lockdep.c:4510 Code: fd 09 0f 87 53 01 00 00 49 89 f4 83 fd 08 0f 84 ff 00 00 00 ba 01 00 00 00 89 e9 d3 e2 4c 63 fa 48 b8 00 00 00 00 00 fc ff df <4d> 8d 74 24 20 4c 89 f1 48 c1 e9 03 0f b6 04 01 84 c0 74 08 3c 03 RSP: 0018:ffff88806ce08ff0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 1ffff1100d9c1205 RCX: 1ffffffff0cf330a RDX: 0000000000000002 RSI: ffff88804557a2d0 RDI: ffff88804557a2f2 RBP: 0000000000000008 R08: 0000000000000000 R09: ffffffff8679566f R10: fffffbfff0cf2acd R11: 0000000000000001 R12: ffff88804557a2d0 R13: ffff88804557a2d0 R14: 0000000000000004 R15: 0000000000000100 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1e2e3d9423 CR3: 00000000457aa000 CR4: 0000000000350ef0 Call Trace: mark_usage kernel/locking/lockdep.c:4453 [inline] __lock_acquire+0x890/0x5b00 kernel/locking/lockdep.c:4908 lock_acquire kernel/locking/lockdep.c:5565 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5530 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x2f/0x40 kernel/locking/spinlock.c:167 __run_hrtimer kernel/time/hrtimer.c:1587 [inline] __hrtimer_run_queues+0x230/0xb50 kernel/time/hrtimer.c:1647 hrtimer_interrupt+0x2fd/0x9b0 kernel/time/hrtimer.c:1709 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1084 [inline] __sysvec_apic_timer_interrupt+0xfb/0x400 arch/x86/kernel/apic/apic.c:1101 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline] sysvec_apic_timer_interrupt+0x3e/0xa0 arch/x86/kernel/apic/apic.c:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:deref_stack_regs arch/x86/kernel/unwind_orc.c:375 [inline] RIP: 0010:unwind_next_frame+0x10f7/0x1a90 arch/x86/kernel/unwind_orc.c:549 Code: b8 00 00 00 00 00 fc ff df 49 8d 7d 40 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 06 00 00 49 89 6d 40 e9 d1 fc ff ff 4c 89 e6 <49> 8d bf 80 00 00 00 48 ba 00 00 00 00 00 fc ff df e8 63 e7 ff ff RSP: 0018:ffff88806ce09668 EFLAGS: 00000202 RAX: ffff8880475e0001 RBX: 0000000000000001 RCX: 1ffff1100d9c12ea RDX: ffff8880475df501 RSI: ffff88806ce09788 RDI: ffff88806ce09750 RBP: ffff88806ce09775 R08: ffffffff85d2fc21 R09: ffff8880475df4e8 R10: 0000000000032042 R11: 1ffff1100d9c12d5 R12: ffff88806ce09788 R13: ffff88806ce09740 R14: 1ffff1100d9c12d5 R15: ffff8880475df4e8 arch_stack_walk+0x83/0xf0 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+0xc9/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] kmem_cache_alloc_node+0x14b/0x370 mm/slub.c:2932 __alloc_skb+0x6d/0x620 net/core/skbuff.c:198 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:446 netdev_alloc_skb include/linux/skbuff.h:2836 [inline] dev_alloc_skb include/linux/skbuff.h:2849 [inline] __ieee80211_beacon_get+0x3af/0x13a0 net/mac80211/tx.c:4874 ieee80211_beacon_get_tim+0x88/0x910 net/mac80211/tx.c:4988 ieee80211_beacon_get include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x111/0x8f0 drivers/net/wireless/mac80211_hwsim.c:1740 __iterate_interfaces+0x1f0/0x530 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x72/0x180 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1793 __run_hrtimer kernel/time/hrtimer.c:1583 [inline] __hrtimer_run_queues+0x5e8/0xb50 kernel/time/hrtimer.c:1647 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1664 __do_softirq+0x1b8/0x86b kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __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+0x80/0xa0 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+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:strlen+0x5f/0xa0 lib/string.c:568 Code: 00 00 00 00 fc ff df 48 89 e8 48 83 c0 01 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 0f b6 14 1a 38 ca 7f 04 84 d2 75 27 80 38 00 <75> de 48 83 c4 08 48 29 e8 5b 5d e9 11 02 22 02 48 83 c4 08 31 c0 RSP: 0018:ffff8880475df598 EFLAGS: 00000202 RAX: ffffffff8447c887 RBX: dffffc0000000000 RCX: 0000000000000007 RDX: 0000000000000000 RSI: ffffffff84ff82e0 RDI: ffffffff8447c880 RBP: ffffffff8447c880 R08: 0000000000000000 R09: ffffffff85670a8f R10: fffffbfff0ace151 R11: 0000000000000001 R12: ffffffff84ff82e0 R13: ffff88804362d378 R14: ffffffff84efe540 R15: ffff8880475df668 strlen include/linux/string.h:321 [inline] trace_event_get_offsets_lock include/trace/events/lock.h:39 [inline] perf_trace_lock+0xac/0x490 include/trace/events/lock.h:39 trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x470/0x6b0 kernel/locking/lockdep.c:5576 zap_pte_range mm/memory.c:1287 [inline] zap_pmd_range mm/memory.c:1404 [inline] zap_pud_range mm/memory.c:1433 [inline] zap_p4d_range mm/memory.c:1454 [inline] unmap_page_range+0x1119/0x1ea0 mm/memory.c:1475 unmap_single_vma+0x198/0x300 mm/memory.c:1520 unmap_vmas+0x16d/0x300 mm/memory.c:1552 exit_mmap+0x27f/0x4f0 mm/mmap.c:3235 __mmput kernel/fork.c:1089 [inline] mmput+0xca/0x340 kernel/fork.c:1110 exit_mm kernel/exit.c:487 [inline] do_exit+0xb21/0x2740 kernel/exit.c:798 do_group_exit+0x125/0x310 kernel/exit.c:908 get_signal+0x469/0x2210 kernel/signal.c:2748 arch_do_signal+0x8c/0x1c60 arch/x86/kernel/signal.c:805 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0xf7/0x160 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fc952430b19 Code: Unable to access opcode bytes at RIP 0x7fc952430aef. RSP: 002b:00007fc94f9a6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: fffffffffffffffe RBX: 00007fc952543f60 RCX: 00007fc952430b19 RDX: 0000000000000000 RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00007fc95248af6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffc334353f R14: 00007fc94f9a6300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 72 4d jb 0x4f 2: 4c 89 e0 mov %r12,%rax 5: 48 29 e8 sub %rbp,%rax 8: 48 89 c2 mov %rax,%rdx b: 48 c1 e8 3f shr $0x3f,%rax f: 48 c1 fa 02 sar $0x2,%rdx 13: 48 01 d0 add %rdx,%rax 16: 48 d1 f8 sar %rax 19: 48 8d 5c 85 00 lea 0x0(%rbp,%rax,4),%rbx 1e: 48 89 d8 mov %rbx,%rax 21: 48 c1 e8 03 shr $0x3,%rax 25: 42 0f b6 14 38 movzbl (%rax,%r15,1),%edx * 2a: 48 89 d8 mov %rbx,%rax <-- trapping instruction 2d: 83 e0 07 and $0x7,%eax 30: 83 c0 03 add $0x3,%eax 33: 38 d0 cmp %dl,%al 35: 7c 04 jl 0x3b 37: 84 d2 test %dl,%dl 39: 75 50 jne 0x8b 3b: 48 63 03 movslq (%rbx),%rax 3e: 48 rex.W 3f: 01 .byte 0x1