watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz-executor.0:5644] Modules linked in: irq event stamp: 5080327 hardirqs last enabled at (5080326): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (5080327): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1094 softirqs last enabled at (5033596): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (5033599): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 5644 Comm: syz-executor.0 Not tainted 5.10.223 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_get_return_address arch/x86/kernel/unwind_orc.c:323 [inline] RIP: 0010:unwind_get_return_address+0x55/0xa0 arch/x86/kernel/unwind_orc.c:318 Code: 5d e9 cf d0 0f 03 48 b8 00 00 00 00 00 fc ff df 48 8d 6b 48 48 89 ea 48 c1 ea 03 80 3c 02 00 75 36 48 8b 7b 48 e8 4b 64 0b 00 <85> c0 74 cf 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 RSP: 0018:ffff88806ce09878 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffff88806ce09890 RCX: 1ffff1100d9c1301 RDX: 1ffff1100d9c131b RSI: ffff88806ce09f18 RDI: ffffffff81312de8 RBP: ffff88806ce098d8 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032042 R11: 1ffff1100d9c12ff R12: ffff88806ce09948 R13: 0000000000000000 R14: ffff888060283480 R15: ffff88801f2a9500 FS: 00007fc4ac35f700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555571d56d0 CR3: 000000004dc02000 CR4: 0000000000350ef0 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+0x1c/0x30 mm/kasan/common.c:56 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355 __kasan_slab_free+0x110/0x160 mm/kasan/common.c:422 slab_free_hook mm/slub.c:1542 [inline] slab_free_freelist_hook+0xa9/0x180 mm/slub.c:1576 slab_free mm/slub.c:3149 [inline] kmem_cache_free+0xa7/0x2d0 mm/slub.c:3165 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:637 __kfree_skb net/core/skbuff.c:694 [inline] consume_skb net/core/skbuff.c:849 [inline] consume_skb+0x11d/0x2b0 net/core/skbuff.c:843 mac80211_hwsim_tx_frame+0x15a/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1717 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:unwind_next_frame+0x1226/0x1a90 arch/x86/kernel/unwind_orc.c:589 Code: 89 4c 24 20 e8 fb 0e 5c 00 48 8b 4c 24 20 e9 06 fe ff ff 4c 8b 64 24 60 48 8d 79 02 49 8d 55 40 48 be 00 00 00 00 00 fc ff df <48> 89 f8 48 c1 e8 03 44 0f b6 04 30 48 8d 41 03 49 89 c1 49 c1 e9 RSP: 0018:ffff88805f07f460 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff85a06a6e RDX: ffff88805f07f578 RSI: dffffc0000000000 RDI: ffffffff85a06a70 RBP: ffff88805f07f56d R08: 0000000000000003 R09: ffff88805f07f9a8 R10: 0000000000032042 R11: 1ffff1100be0fe94 R12: ffff88805f07f9a8 R13: ffff88805f07f538 R14: 1ffff1100be0fe94 R15: ffffffff85a06a72 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+0x1c/0x30 mm/kasan/common.c:56 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355 __kasan_slab_free+0x110/0x160 mm/kasan/common.c:422 slab_free_hook mm/slub.c:1542 [inline] slab_free_freelist_hook+0xa9/0x180 mm/slub.c:1576 slab_free mm/slub.c:3149 [inline] kmem_cache_free+0xa7/0x2d0 mm/slub.c:3165 anon_vma_chain_free mm/rmap.c:142 [inline] unlink_anon_vmas+0x116/0x710 mm/rmap.c:416 free_pgtables+0x1ab/0x2f0 mm/memory.c:415 exit_mmap+0x28e/0x4f0 mm/mmap.c:3236 __mmput kernel/fork.c:1101 [inline] mmput+0xca/0x340 kernel/fork.c:1122 dup_mm kernel/fork.c:1396 [inline] copy_mm kernel/fork.c:1436 [inline] copy_process+0x6ac9/0x7800 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: 0033:0x7fc4aede9b19 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:00007fc4ac35f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000039 RAX: ffffffffffffffda RBX: 00007fc4aeefcf60 RCX: 00007fc4aede9b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fc4aee43f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcb07ebe4f R14: 00007fc4ac35f300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 945 Comm: kworker/u4:9 Not tainted 5.10.223 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Workqueue: phy6 ieee80211_iface_work RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:171 [inline] RIP: 0010:unwind_next_frame+0x291/0x1a90 arch/x86/kernel/unwind_orc.c:448 Code: 8d 04 7f 4f 8d 84 00 10 c4 95 85 83 c2 01 49 81 f8 e8 8f d6 85 0f 83 14 10 00 00 41 89 d1 4f 8d 0c 49 4f 8d 8c 09 10 c4 95 85 <49> 81 f9 e8 8f d6 85 0f 87 f8 0f 00 00 29 ca 48 8d 3c bd 80 91 6a RSP: 0018:ffff888047456d80 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 000000000000f2e9 RDX: 000000000000f303 RSI: 0000000000003009 RDI: 000000000000f2e9 RBP: ffff888047456e8d R08: ffffffff859b7586 R09: ffffffff859b7622 R10: 0000000000032042 R11: 1ffff11008e8adb8 R12: ffff888047456ea0 R13: ffff888047456e58 R14: 1ffff11008e8adb8 R15: ffffffff8130090b FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055857f8dad98 CR3: 0000000044306000 CR4: 0000000000350ee0 Call Trace: 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] slab_alloc mm/slub.c:2904 [inline] __kmalloc+0x16e/0x390 mm/slub.c:3967 kmalloc include/linux/slab.h:557 [inline] kzalloc include/linux/slab.h:664 [inline] cfg80211_inform_single_bss_frame_data+0x2de/0xf00 net/wireless/scan.c:2454 cfg80211_inform_bss_frame_data+0xbf/0xcc0 net/wireless/scan.c:2515 ieee80211_bss_info_update+0x37e/0xc00 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1130 [inline] ieee80211_rx_mgmt_probe_beacon+0xc96/0x1780 net/mac80211/ibss.c:1619 ieee80211_ibss_rx_queued_mgmt+0xddd/0x1750 net/mac80211/ibss.c:1646 ieee80211_iface_work+0x6e3/0x930 net/mac80211/iface.c:1454 process_one_work+0x9a9/0x14b0 kernel/workqueue.c:2282 worker_thread+0x61d/0x1310 kernel/workqueue.c:2428 kthread+0x38f/0x470 kernel/kthread.c:328 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:298 hpet_rtc_timer_reinit: 29 callbacks suppressed hpet: Lost 3 RTC interrupts hpet: Lost 2 RTC interrupts ---------------- Code disassembly (best guess): 0: 5d pop %rbp 1: e9 cf d0 0f 03 jmpq 0x30fd0d5 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 48 8d 6b 48 lea 0x48(%rbx),%rbp 14: 48 89 ea mov %rbp,%rdx 17: 48 c1 ea 03 shr $0x3,%rdx 1b: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 1f: 75 36 jne 0x57 21: 48 8b 7b 48 mov 0x48(%rbx),%rdi 25: e8 4b 64 0b 00 callq 0xb6475 * 2a: 85 c0 test %eax,%eax <-- trapping instruction 2c: 74 cf je 0xfffffffd 2e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 35: fc ff df 38: 48 89 ea mov %rbp,%rdx 3b: 48 c1 ea 03 shr $0x3,%rdx 3f: 80 .byte 0x80