watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.3:4072] Modules linked in: irq event stamp: 4819935 hardirqs last enabled at (4819934): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4819935): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (4816448): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4816453): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 4072 Comm: syz-executor.3 Not tainted 5.10.236 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_next_frame+0x35/0x1a90 arch/x86/kernel/unwind_orc.c:423 Code: 57 41 56 41 55 49 89 fd 41 54 55 53 48 81 ec a0 00 00 00 48 c7 44 24 40 b3 8a b5 41 4c 8d 5c 24 40 48 c7 44 24 48 f0 07 bd 84 <49> c1 eb 03 48 c7 44 24 50 c0 72 10 81 49 8d 14 03 4d 89 de c7 02 RSP: 0018:ffff88806cf095d0 EFLAGS: 00000282 RAX: dffffc0000000000 RBX: ffffffff81301cb0 RCX: 1ffff1100d9e1201 RDX: 1ffff1100d9e12fc RSI: ffffffff816c6f0b RDI: ffff88806cf096a8 RBP: ffff88806cf09730 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032042 R11: ffff88806cf09610 R12: ffff88806cf09760 R13: ffff88806cf096a8 R14: ffff888048c08000 R15: 0000000000000170 FS: 00007fd71250e700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2dc27000 CR3: 000000001d32e000 CR4: 0000000000350ee0 Call Trace: 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:200 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:448 netdev_alloc_skb include/linux/skbuff.h:2855 [inline] dev_alloc_skb include/linux/skbuff.h:2868 [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:1588 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1652 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1669 __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:lock_acquire+0x1b9/0x470 kernel/locking/lockdep.c:5534 Code: 32 db 7e e8 39 91 ff ff b8 ff ff ff ff 48 83 c4 20 65 0f c1 05 18 32 db 7e 83 f8 01 4c 8b 54 24 08 0f 85 48 02 00 00 41 52 9d <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7 RSP: 0018:ffff8880461e75d8 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 1ffff11008c3cebd RCX: 0000000039685971 RDX: 1ffff11009181128 RSI: c96452b86424214b RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8686c6e7 R10: 0000000000000246 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff84ff9a20 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:303 [inline] rcu_read_lock include/linux/rcupdate.h:717 [inline] mod_objcg_state mm/slab.h:310 [inline] memcg_slab_free_hook mm/slab.h:383 [inline] memcg_slab_free_hook mm/slab.h:351 [inline] do_slab_free mm/slub.c:3105 [inline] ___cache_free+0x14d/0x360 mm/slub.c:3156 qlink_free mm/kasan/quarantine.c:151 [inline] qlist_free_all+0x59/0xe0 mm/kasan/quarantine.c:170 quarantine_reduce+0x184/0x210 mm/kasan/quarantine.c:267 __kasan_kmalloc.constprop.0+0xa2/0xd0 mm/kasan/common.c:442 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] __kmalloc_track_caller+0x159/0x370 mm/slub.c:4465 kstrdup+0x36/0x70 mm/util.c:60 kstrdup_const+0x53/0x80 mm/util.c:83 alloc_vfsmnt+0xb5/0x680 fs/namespace.c:186 clone_mnt+0x6c/0xce0 fs/namespace.c:1039 copy_tree+0x3b0/0xa60 fs/namespace.c:1860 copy_mnt_ns+0x144/0xa00 fs/namespace.c:3357 create_new_namespaces+0xd6/0xb20 kernel/nsproxy.c:78 copy_namespaces+0x3fb/0x4f0 kernel/nsproxy.c:179 copy_process+0x385b/0x7800 kernel/fork.c:2129 kernel_clone+0xe7/0x980 kernel/fork.c:2506 __do_sys_clone3+0x1e5/0x320 kernel/fork.c:2781 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7fd714f98b19 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:00007fd71250e188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007fd7150abf60 RCX: 00007fd714f98b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000ac0 RBP: 00007fd714ff2f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe5d2142cf R14: 00007fd71250e300 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:711 ---------------- Code disassembly (best guess): 0: 57 push %rdi 1: 41 56 push %r14 3: 41 55 push %r13 5: 49 89 fd mov %rdi,%r13 8: 41 54 push %r12 a: 55 push %rbp b: 53 push %rbx c: 48 81 ec a0 00 00 00 sub $0xa0,%rsp 13: 48 c7 44 24 40 b3 8a movq $0x41b58ab3,0x40(%rsp) 1a: b5 41 1c: 4c 8d 5c 24 40 lea 0x40(%rsp),%r11 21: 48 c7 44 24 48 f0 07 movq $0xffffffff84bd07f0,0x48(%rsp) 28: bd 84 * 2a: 49 c1 eb 03 shr $0x3,%r11 <-- trapping instruction 2e: 48 c7 44 24 50 c0 72 movq $0xffffffff811072c0,0x50(%rsp) 35: 10 81 37: 49 8d 14 03 lea (%r11,%rax,1),%rdx 3b: 4d 89 de mov %r11,%r14 3e: c7 .byte 0xc7 3f: 02 .byte 0x2