watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.3:4679] Modules linked in: irq event stamp: 5312399 hardirqs last enabled at (5312398): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (5312399): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (5277682): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (5277685): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 4679 Comm: syz-executor.3 Not tainted 5.10.228 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:50 [inline] RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:347 [inline] RIP: 0010:deref_stack_reg+0x38/0x160 arch/x86/kernel/unwind_orc.c:357 Code: 49 89 fc 55 48 89 f5 53 48 89 d3 48 89 fa 48 c1 ea 03 48 83 ec 08 0f b6 04 02 84 c0 74 08 3c 03 0f 8e df 00 00 00 41 8b 04 24 <85> c0 74 62 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 08 48 89 fa RSP: 0018:ffff88806cf095a0 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88806cf096e8 RCX: ffffffff85a1a97e RDX: 1ffff1100d9e12d5 RSI: ffff88801ae17a00 RDI: ffff88806cf096a8 RBP: ffff88801ae17a00 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032042 R11: 1ffff1100d9e12c2 R12: ffff88806cf096a8 R13: ffff88806cf096a8 R14: 1ffff1100d9e12c2 R15: ffffffff85a1a982 FS: 00007fb409d6b700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9f1d709718 CR3: 000000000da34000 CR4: 0000000000350ee0 Call Trace: unwind_next_frame+0x1289/0x1a90 arch/x86/kernel/unwind_orc.c:589 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] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x13b/0x310 mm/slub.c:2909 mem_pool_alloc mm/kmemleak.c:423 [inline] create_object.isra.0+0x3a/0xa20 mm/kmemleak.c:578 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+0x169/0x330 mm/slub.c:2932 __alloc_skb+0x6d/0x5b0 net/core/skbuff.c:199 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:447 netdev_alloc_skb include/linux/skbuff.h:2854 [inline] dev_alloc_skb include/linux/skbuff.h:2867 [inline] __ieee80211_beacon_get+0x3af/0x1440 net/mac80211/tx.c:4876 ieee80211_beacon_get_tim+0x88/0x9f0 net/mac80211/tx.c:4990 ieee80211_beacon_get include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x111/0x940 drivers/net/wireless/mac80211_hwsim.c:1740 __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:1586 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1650 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1667 __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:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:__unwind_start+0x37e/0x7e0 arch/x86/kernel/unwind_orc.c:654 Code: 00 00 49 8b 77 28 4c 89 e1 4c 89 fa 48 89 ef e8 78 84 f6 ff 85 c0 0f 85 5a ff ff ff e9 e7 fe ff ff 65 48 8b 04 25 80 6f 02 00 <48> 39 c5 0f 84 10 02 00 00 48 8d bd 18 15 00 00 48 b8 00 00 00 00 RSP: 0018:ffff88801ae17870 EFLAGS: 00000246 RAX: ffff888047f59a40 RBX: ffff88801ae17948 RCX: 0000000000000000 RDX: 1ffff110035c2f1d RSI: 0000000000000000 RDI: ffff88801ae17920 RBP: ffff888047f59a40 R08: 0000000000000001 R09: ffff88801ae178c0 R10: ffffed10035c2f23 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88801ae178e8 R14: ffff888047f59a40 R15: ffff88801ae178c0 unwind_start arch/x86/include/asm/unwind.h:60 [inline] arch_stack_walk+0x5f/0xf0 arch/x86/kernel/stacktrace.c:24 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] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x159/0x310 mm/slub.c:2909 anon_vma_chain_alloc mm/rmap.c:137 [inline] anon_vma_clone+0xdc/0x590 mm/rmap.c:283 anon_vma_fork+0x82/0x640 mm/rmap.c:346 dup_mmap kernel/fork.c:552 [inline] dup_mm kernel/fork.c:1380 [inline] copy_mm kernel/fork.c:1436 [inline] copy_process+0x7218/0x7800 kernel/fork.c:2126 kernel_clone+0xe7/0x980 kernel/fork.c:2506 __do_sys_fork+0x8a/0xc0 kernel/fork.c:2569 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7fb40c7f5b19 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:00007fb409d6b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000039 RAX: ffffffffffffffda RBX: 00007fb40c908f60 RCX: 00007fb40c7f5b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fb40c84ff6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcf836da5f R14: 00007fb409d6b300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:706 ---------------- Code disassembly (best guess): 0: 49 89 fc mov %rdi,%r12 3: 55 push %rbp 4: 48 89 f5 mov %rsi,%rbp 7: 53 push %rbx 8: 48 89 d3 mov %rdx,%rbx b: 48 89 fa mov %rdi,%rdx e: 48 c1 ea 03 shr $0x3,%rdx 12: 48 83 ec 08 sub $0x8,%rsp 16: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 1a: 84 c0 test %al,%al 1c: 74 08 je 0x26 1e: 3c 03 cmp $0x3,%al 20: 0f 8e df 00 00 00 jle 0x105 26: 41 8b 04 24 mov (%r12),%eax * 2a: 85 c0 test %eax,%eax <-- trapping instruction 2c: 74 62 je 0x90 2e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 35: fc ff df 38: 49 8d 7c 24 08 lea 0x8(%r12),%rdi 3d: 48 89 fa mov %rdi,%rdx