watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.0:5168] Modules linked in: irq event stamp: 4316827 hardirqs last enabled at (4316826): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4316827): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (4298080): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4298083): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 5168 Comm: syz-executor.0 Not tainted 5.10.158 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_get_return_address+0x24/0xa0 arch/x86/kernel/unwind_orc.c:320 Code: 00 00 00 00 00 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 53 48 89 fb 0f b6 04 02 84 c0 74 04 3c 03 7e 59 8b 03 <85> c0 75 09 31 c0 5b 5d e9 df c0 0f 03 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffff88806cf09730 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffff88806cf09748 RCX: ffff88806cf097d8 RDX: 1ffff1100d9e12e9 RSI: ffff88806cf097d0 RDI: ffff88806cf09748 RBP: ffff88806cf097d0 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032042 R11: 1ffff1100d9e12cc R12: ffff88806cf09800 R13: 0000000000000000 R14: ffff88800e510000 R15: 00000000000000e0 FS: 00007fa68857c700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5da1c2d7e0 CR3: 000000004887c000 CR4: 0000000000350ee0 Call Trace: 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] kmem_cache_alloc_node+0x14b/0x370 mm/slub.c:2932 __alloc_skb+0x6d/0x620 net/core/skbuff.c:198 skb_copy+0x137/0x2f0 net/core/skbuff.c:1522 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+0x494/0x8f0 drivers/net/wireless/mac80211_hwsim.c:1770 __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:memset include/linux/string.h:384 [inline] RIP: 0010:pcpu_alloc+0x44b/0x12f0 mm/percpu.c:1839 Code: ea 48 8b 45 38 4c 8d 3c d1 4c 89 f9 48 c1 e9 03 80 3c 19 00 0f 85 cc 0d 00 00 48 8b 0c 24 4c 89 e2 31 f6 48 8d 3c 08 49 03 3f d0 d3 0f 00 e8 4b 4f e4 ff 44 89 ef 48 c7 c6 90 06 67 85 e8 5c RSP: 0018:ffff888045597810 EFLAGS: 00000286 RAX: ffffe8ffffc00000 RBX: dffffc0000000000 RCX: 0000000000019290 RDX: 0000000000000008 RSI: 0000000000000000 RDI: ffffe8ffffc19290 RBP: ffff88800c465900 R08: 0000000000000000 R09: ffff88801922e623 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000008 R13: 0000000000000000 R14: fffffbfff0ace108 R15: ffff88807ffd6500 alloc_vfsmnt+0xfd/0x680 fs/namespace.c:192 clone_mnt+0x6c/0xce0 fs/namespace.c:1039 copy_tree+0x3b0/0xa60 fs/namespace.c:1860 copy_mnt_ns+0x144/0xa00 fs/namespace.c:3339 create_new_namespaces+0xd6/0xb20 kernel/nsproxy.c:78 copy_namespaces+0x39e/0x480 kernel/nsproxy.c:179 copy_process+0x2463/0x66f0 kernel/fork.c:2109 kernel_clone+0xe7/0xa20 kernel/fork.c:2467 __do_sys_clone3+0x1e5/0x320 kernel/fork.c:2742 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fa68b006b19 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:00007fa68857c188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007fa68b119f60 RCX: 00007fa68b006b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000140 RBP: 00007fa68b060f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffca894e9ff R14: 00007fa68857c300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.158 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 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 00 df 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 RSP: 0018:ffff88806ce09a38 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffffffff8792eda0 RCX: ffffffff81276087 RDX: fffffbfff0f25db5 RSI: 0000000000000004 RDI: ffffffff8792eda0 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8792eda3 R10: fffffbfff0f25db4 R11: 0000000000000001 R12: 0000000000000003 R13: fffffbfff0f25db4 R14: 0000000000000001 R15: 1ffff1100d9c1348 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2bf3b93998 CR3: 000000000d020000 CR4: 0000000000350ef0 Call Trace: queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock+0x1dc/0x260 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:354 [inline] mac80211_hwsim_tx_frame_no_nl.isra.0+0x695/0x13d0 drivers/net/wireless/mac80211_hwsim.c:1450 mac80211_hwsim_tx_frame+0x152/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1716 mac80211_hwsim_beacon_tx+0x494/0x8f0 drivers/net/wireless/mac80211_hwsim.c:1770 __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:default_idle+0xe/0x20 arch/x86/kernel/process.c:690 Code: 89 fd e9 4b ff ff ff 4c 89 e7 e8 0d df 89 fd eb 8f 66 66 2e 0f 1f 84 00 00 00 00 00 e9 07 00 00 00 0f 00 2d 64 49 60 00 fb f4 dd 47 3e 00 cc cc cc cc cc cc cc cc cc cc cc cc cc 41 55 41 54 RSP: 0018:ffffffff84e07e40 EFLAGS: 00000206 RAX: ffffffff83e1f810 RBX: ffffffff84e322c0 RCX: ffffffff83e0755c RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e1fbd3 RBP: fffffbfff09c6458 R08: 0000000000000001 R09: ffff88806ce3c12b R10: ffffed100d9c7825 R11: 0000000000000001 R12: 0000000000000000 R13: ffffffff85670688 R14: 0000000000000000 R15: dffffc0000000000 default_idle_call+0x8b/0xd0 kernel/sched/idle.c:112 cpuidle_idle_call kernel/sched/idle.c:194 [inline] do_idle+0x3ad/0x520 kernel/sched/idle.c:300 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:396 start_kernel+0x469/0x48e init/main.c:1055 secondary_startup_64_no_verify+0xc2/0xcb ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 90 nop 5: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax c: fc ff df f: 48 89 fa mov %rdi,%rdx 12: 55 push %rbp 13: 48 c1 ea 03 shr $0x3,%rdx 17: 53 push %rbx 18: 48 89 fb mov %rdi,%rbx 1b: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 1f: 84 c0 test %al,%al 21: 74 04 je 0x27 23: 3c 03 cmp $0x3,%al 25: 7e 59 jle 0x80 27: 8b 03 mov (%rbx),%eax * 29: 85 c0 test %eax,%eax <-- trapping instruction 2b: 75 09 jne 0x36 2d: 31 c0 xor %eax,%eax 2f: 5b pop %rbx 30: 5d pop %rbp 31: e9 df c0 0f 03 jmpq 0x30fc115 36: 48 rex.W 37: b8 00 00 00 00 mov $0x0,%eax 3c: 00 fc add %bh,%ah 3e: ff .byte 0xff