watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.5:4131] Modules linked in: irq event stamp: 9817473 hardirqs last enabled at (9817472): [] asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:661 hardirqs last disabled at (9817473): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1094 softirqs last enabled at (9801590): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (9801593): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 4131 Comm: syz-executor.5 Not tainted 5.10.186 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_get_return_address+0xd/0xa0 arch/x86/kernel/unwind_orc.c:319 Code: e8 f8 be 5b 00 eb ac e8 f1 be 5b 00 e9 75 ff ff ff 66 66 2e 0f 1f 84 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 RSP: 0018:ffff88806cf09738 EFLAGS: 00000202 RAX: dffffc0000000000 RBX: ffffffff812fd960 RCX: 1ffff1100d9e1201 RDX: ffff88806cf09740 RSI: ffff88806cf09db8 RDI: ffff88806cf09740 RBP: ffff88806cf097c8 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032041 R11: 1ffff1100d9e12d5 R12: ffff88806cf097f8 R13: 0000000000000000 R14: ffff88804754cec0 R15: 00000000000000e8 FS: 00007f1069ef8700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5870d9b344 CR3: 0000000018158000 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/0x330 mm/slub.c:2932 __alloc_skb+0x6d/0x5b0 net/core/skbuff.c:198 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:446 netdev_alloc_skb include/linux/skbuff.h:2842 [inline] dev_alloc_skb include/linux/skbuff.h:2855 [inline] __ieee80211_beacon_get+0x3af/0x1440 net/mac80211/tx.c:4874 ieee80211_beacon_get_tim+0x88/0x9f0 net/mac80211/tx.c:4988 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:1583 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1647 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1664 __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:refill_obj_stock+0x18c/0x320 mm/memcontrol.c:3227 Code: f4 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 45 01 00 00 44 89 65 18 41 81 fc 00 10 00 00 77 56 4d 85 f6 75 4a 41 55 9d <48> 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f e9 c1 6d b2 02 48 b8 00 RSP: 0018:ffff88801df770c0 EFLAGS: 00000286 RAX: 000000000094d3ad RBX: ffff88806cf38d38 RCX: 1ffffffff0d0d022 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff816dd1b8 RBP: ffff88806cf38d20 R08: 0000000000000001 R09: ffffffff8685d6ff R10: fffffbfff0d0badf R11: 0000000000000001 R12: 0000000000000578 R13: 0000000000000286 R14: 0000000000000200 R15: 00000000000002f0 memcg_slab_free_hook mm/slab.h:382 [inline] memcg_slab_free_hook mm/slab.h:351 [inline] do_slab_free mm/slub.c:3105 [inline] ___cache_free+0x101/0x360 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] kmem_cache_alloc+0x13b/0x310 mm/slub.c:2909 kmem_cache_zalloc include/linux/slab.h:654 [inline] __kernfs_new_node+0xd4/0x850 fs/kernfs/dir.c:635 kernfs_new_node+0x93/0x120 fs/kernfs/dir.c:697 __kernfs_create_file+0x51/0x350 fs/kernfs/file.c:985 sysfs_add_file_mode_ns+0x221/0x560 fs/sysfs/file.c:306 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x324/0xb30 fs/sysfs/group.c:149 internal_create_groups.part.0+0x90/0x140 fs/sysfs/group.c:189 internal_create_groups fs/sysfs/group.c:185 [inline] sysfs_create_groups+0x25/0x50 fs/sysfs/group.c:215 create_dir lib/kobject.c:100 [inline] kobject_add_internal+0x550/0xa30 lib/kobject.c:255 kobject_add_varg lib/kobject.c:390 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:473 netdev_queue_add_kobject net/core/net-sysfs.c:1649 [inline] netdev_queue_update_kobjects+0x13b/0x3e0 net/core/net-sysfs.c:1694 register_queue_kobjects net/core/net-sysfs.c:1755 [inline] netdev_register_kobject+0x2ee/0x3b0 net/core/net-sysfs.c:2001 register_netdevice+0xd6e/0x1480 net/core/dev.c:10021 register_netdev+0x2d/0x50 net/core/dev.c:10145 sit_init_net+0x264/0x500 net/ipv6/sit.c:1916 ops_init+0xbb/0x6b0 net/core/net_namespace.c:153 setup_net+0x2d8/0x810 net/core/net_namespace.c:351 copy_net_ns+0x2cf/0x5e0 net/core/net_namespace.c:492 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x3fb/0x4f0 kernel/nsproxy.c:179 copy_process+0x2549/0x6740 kernel/fork.c:2121 kernel_clone+0xe7/0x980 kernel/fork.c:2503 __do_sys_clone3+0x1e5/0x320 kernel/fork.c:2778 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f106c982b19 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:00007f1069ef8188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f106ca95f60 RCX: 00007f106c982b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00000000200001c0 RBP: 00007f106c9dcf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffec3a1a16f R14: 00007f1069ef8300 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: e8 f8 be 5b 00 callq 0x5bbefd 5: eb ac jmp 0xffffffb3 7: e8 f1 be 5b 00 callq 0x5bbefd c: e9 75 ff ff ff jmpq 0xffffff86 11: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 18: 00 00 00 00 1c: 90 nop 1d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 24: fc ff df 27: 48 89 fa mov %rdi,%rdx * 2a: 55 push %rbp <-- trapping instruction 2b: 48 c1 ea 03 shr $0x3,%rdx 2f: 53 push %rbx 30: 48 89 fb mov %rdi,%rbx 33: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 37: 84 c0 test %al,%al 39: 74 04 je 0x3f 3b: 3c 03 cmp $0x3,%al 3d: 7e 59 jle 0x98 3f: 8b .byte 0x8b