audit: type=1400 audit(1748959867.373:12): avc: denied { create } for pid=4589 comm="syz-executor.7" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1 watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [syz-executor.1:4539] Modules linked in: irq event stamp: 6427729 hardirqs last enabled at (6427728): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (6427729): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (6399728): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (6399735): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 4539 Comm: syz-executor.1 Not tainted 5.10.237 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:lock_acquire+0x1cd/0x470 kernel/locking/lockdep.c:5534 Code: 05 28 35 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 43 08 00 00 00 00 48 8b 84 24 a8 00 00 00 65 48 2b 04 25 28 RSP: 0018:ffff88806cf095e0 EFLAGS: 00000286 RAX: dffffc0000000000 RBX: ffffed100d9e12be RCX: 00000000dae8d753 RDX: 1ffff11008c91b00 RSI: 5375d53866b060ea RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8686c6a7 R10: 0000000000000246 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff84ff9220 R15: 0000000000000000 FS: 00007f8d0f1f3700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c8fd4a3b28 CR3: 0000000017624000 CR4: 0000000000350ee0 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] rcu_read_lock include/linux/rcupdate.h:717 [inline] __is_insn_slot_addr+0x3f/0x290 kernel/kprobes.c:299 is_kprobe_insn_slot include/linux/kprobes.h:309 [inline] kernel_text_address kernel/extable.c:149 [inline] kernel_text_address+0xf2/0x120 kernel/extable.c:120 __kernel_text_address+0x9/0x40 kernel/extable.c:105 unwind_get_return_address arch/x86/kernel/unwind_orc.c:323 [inline] unwind_get_return_address+0x55/0xa0 arch/x86/kernel/unwind_orc.c:318 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: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: 35 db 7e e8 39 91 ff ff b8 ff ff ff ff 48 83 c4 20 65 0f c1 05 28 35 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:ffff88801caf7598 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 1ffff1100395eeb5 RCX: 000000007d4b7573 RDX: 1ffff11008c91b00 RSI: a0d010d71bf379d5 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8686c6a7 R10: 0000000000000246 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff84ff9220 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:303 [inline] rcu_read_lock include/linux/rcupdate.h:717 [inline] percpu_ref_put_many.constprop.0+0x2b/0x110 include/linux/percpu-refcount.h:317 percpu_ref_put include/linux/percpu-refcount.h:338 [inline] obj_cgroup_put include/linux/memcontrol.h:518 [inline] memcg_slab_free_hook mm/slab.h:385 [inline] memcg_slab_free_hook mm/slab.h:351 [inline] do_slab_free mm/slub.c:3105 [inline] ___cache_free+0x1de/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_trace+0x133/0x320 mm/slub.c:2921 kmalloc include/linux/slab.h:552 [inline] ip6addrlbl_alloc+0x325/0x3d0 net/ipv6/addrlabel.c:189 ip6addrlbl_add net/ipv6/addrlabel.c:253 [inline] ip6addrlbl_net_init+0x13b/0x360 net/ipv6/addrlabel.c:320 ops_init+0xbb/0x6b0 net/core/net_namespace.c:156 setup_net+0x2f4/0x900 net/core/net_namespace.c:348 copy_net_ns+0x2c0/0x5d0 net/core/net_namespace.c:518 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 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: 0033:0x7f8d11c7db19 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:00007f8d0f1f3188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f8d11d90f60 RCX: 00007f8d11c7db19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000200 RBP: 00007f8d11cd7f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe0cb5d3ff R14: 00007f8d0f1f3300 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: 05 28 35 db 7e add $0x7edb3528,%eax 5: 83 f8 01 cmp $0x1,%eax 8: 4c 8b 54 24 08 mov 0x8(%rsp),%r10 d: 0f 85 48 02 00 00 jne 0x25b 13: 41 52 push %r10 15: 9d popfq 16: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1d: fc ff df 20: 48 01 c3 add %rax,%rbx 23: 48 c7 03 00 00 00 00 movq $0x0,(%rbx) * 2a: 48 c7 43 08 00 00 00 movq $0x0,0x8(%rbx) <-- trapping instruction 31: 00 32: 48 8b 84 24 a8 00 00 mov 0xa8(%rsp),%rax 39: 00 3a: 65 gs 3b: 48 rex.W 3c: 2b .byte 0x2b 3d: 04 25 add $0x25,%al 3f: 28 .byte 0x28