watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.5:5626] Modules linked in: irq event stamp: 6236665 hardirqs last enabled at (6236664): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (6236665): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1094 softirqs last enabled at (6217672): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (6217675): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 5626 Comm: syz-executor.5 Not tainted 5.10.224 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:84 [inline] RIP: 0010:lock_release+0xc2/0x680 kernel/locking/lockdep.c:5579 Code: 48 0f a3 1d 68 2c 40 04 0f 82 26 04 00 00 48 c7 c3 bc 6f 67 85 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 0f b6 14 02 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 cc 04 00 00 44 RSP: 0018:ffff88806ce09608 EFLAGS: 00000213 RAX: dffffc0000000000 RBX: ffffffff85676fbc RCX: ffffffff81273318 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88806ce3c128 RBP: 1ffff1100d9c12c3 R08: 0000000000000000 R09: ffffffff85675f8f R10: fffffbfff0acebf1 R11: 0000000000000001 R12: ffffffff84ff8c20 R13: dffffc0000000000 R14: ffffffff85035cc8 R15: 0000000000000200 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c08c266678 CR3: 0000000016f10000 CR4: 0000000000350ef0 Call Trace: rcu_lock_release include/linux/rcupdate.h:308 [inline] rcu_read_unlock include/linux/rcupdate.h:771 [inline] __is_insn_slot_addr+0x14c/0x290 kernel/kprobes.c:307 is_kprobe_insn_slot include/linux/kprobes.h:309 [inline] kernel_text_address kernel/extable.c:149 [inline] kernel_text_address+0xf2/0x120 kernel/extable.c:120 __kernel_text_address+0x9/0x40 kernel/extable.c:105 unwind_get_return_address arch/x86/kernel/unwind_orc.c:323 [inline] unwind_get_return_address+0x55/0xa0 arch/x86/kernel/unwind_orc.c:318 arch_stack_walk+0x99/0xf0 arch/x86/kernel/stacktrace.c:26 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] __kmalloc_node_track_caller+0x189/0x3b0 mm/slub.c:4496 __kmalloc_reserve net/core/skbuff.c:143 [inline] __alloc_skb+0xb1/0x5b0 net/core/skbuff.c:211 skb_copy+0x183/0x350 net/core/skbuff.c:1529 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb1d/0x13d0 drivers/net/wireless/mac80211_hwsim.c:1499 mac80211_hwsim_tx_frame+0x152/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1716 mac80211_hwsim_beacon_tx+0x494/0x940 drivers/net/wireless/mac80211_hwsim.c:1770 __iterate_interfaces+0x1f0/0x550 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x71/0x1c0 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1793 __run_hrtimer kernel/time/hrtimer.c:1584 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1648 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1665 __do_softirq+0x1b8/0x7c9 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:1094 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:193 Code: ff ff b9 ff ff ff ff b8 08 00 00 00 4d 8b 17 49 8b 16 48 0f bd c8 48 63 c9 e9 5e ff ff ff 4c 01 d2 49 89 17 e9 cd fd ff ff 90 <48> 8b 34 24 65 48 8b 14 25 80 6f 02 00 65 8b 05 cc c9 c1 7e a9 00 RSP: 0018:ffff88804784f628 EFLAGS: 00000296 RAX: 1ffff1100a24e209 RBX: 00000000000001fe RCX: ffffffff8156d8f0 RDX: ffff888049241a40 RSI: ffffffff8156d8fd RDI: 0000000000000004 RBP: 0000000000000007 R08: 0000000000000001 R09: ffffea0001065a77 R10: 00000000000001fe R11: 0000000000000001 R12: ffffea0001065a00 R13: dffffc0000000000 R14: ffff888051271050 R15: ffffea0001065a80 compound_head include/linux/page-flags.h:185 [inline] release_pages+0xcc/0xc20 mm/swap.c:892 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:240 [inline] tlb_flush_mmu+0xe9/0x6e0 mm/mmu_gather.c:247 zap_pte_range mm/memory.c:1355 [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+0x17d9/0x1fe0 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:1101 [inline] mmput+0xca/0x340 kernel/fork.c:1122 exit_mm kernel/exit.c:536 [inline] do_exit+0xa96/0x2600 kernel/exit.c:847 do_group_exit+0x125/0x310 kernel/exit.c:982 get_signal+0x4bc/0x2350 kernel/signal.c:2759 arch_do_signal_or_restart+0x2b7/0x1990 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x10f/0x190 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x38/0x1d0 kernel/entry/common.c:274 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f62f770cb19 Code: Unable to access opcode bytes at RIP 0x7f62f770caef. RSP: 002b:00007f62f4c82188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007f62f781ff60 RCX: 00007f62f770cb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0 RBP: 00007f62f7766f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcf6f637bf R14: 00007f62f4c82300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5623 Comm: syz-executor.2 Not tainted 5.10.224 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20 arch/x86/include/asm/idtentry.h:634 Code: 00 66 0f 1f 84 00 00 00 00 00 0f 01 ca 6a ff e8 16 05 00 00 48 89 e7 e8 fe d6 e5 ff e9 39 06 00 00 66 0f 1f 84 00 00 00 00 00 <0f> 01 ca 6a ff e8 f6 04 00 00 48 89 e7 e8 7e d5 e5 ff e9 19 06 00 RSP: 0018:ffff88806cf09a08 EFLAGS: 00000002 RAX: 0000000000000000 RBX: ffffffff87a04180 RCX: ffffffff81279b37 RDX: fffffbfff0f40831 RSI: 0000000000000004 RDI: ffffffff87a04180 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff87a04183 R10: fffffbfff0f40830 R11: 0000000000000001 R12: 0000000000000003 R13: fffffbfff0f40830 R14: 0000000000000001 R15: 1ffff1100d9e1348 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c08c284620 CR3: 0000000016f10000 CR4: 0000000000350ee0 Call Trace: RIP: 0010:cpu_relax arch/x86/include/asm/vdso/processor.h:19 [inline] RIP: 0010:virt_spin_lock arch/x86/include/asm/qspinlock.h:100 [inline] RIP: 0010:queued_spin_lock_slowpath+0x122/0x8c0 kernel/locking/qspinlock.c:326 Code: 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 09 07 00 00 48 81 c4 88 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 10 a4 f8 02 f3 90 73 ff ff ff 44 8b 74 24 48 41 81 fe 00 01 00 00 0f 84 e1 00 00 ---------------- Code disassembly (best guess): 0: 48 0f a3 1d 68 2c 40 bt %rbx,0x4402c68(%rip) # 0x4402c70 7: 04 8: 0f 82 26 04 00 00 jb 0x434 e: 48 c7 c3 bc 6f 67 85 mov $0xffffffff85676fbc,%rbx 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 48 89 da mov %rbx,%rdx 22: 48 c1 ea 03 shr $0x3,%rdx 26: 0f b6 14 02 movzbl (%rdx,%rax,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 08 jl 0x3f 37: 84 d2 test %dl,%dl 39: 0f 85 cc 04 00 00 jne 0x50b 3f: 44 rex.R