mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium loop0: detected capacity change from 0 to 262144 EXT4-fs (loop0): Unrecognized mount option "ÿÿÿÿÿÿÿÿ" or missing value loop0: detected capacity change from 0 to 4096 watchdog: BUG: soft lockup - CPU#0 stuck for 24s! [syz-executor.5:4012] Modules linked in: irq event stamp: 7632647 hardirqs last enabled at (7632646): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (7632647): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (7610146): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (7610149): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 4012 Comm: syz-executor.5 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+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:ffff88806ce095e0 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 1ffff1100d9c12be RCX: 00000000dae8d753 RDX: 1ffff110017b27b8 RSI: 5375d53866b060ea RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8686c6a7 R10: 0000000000000246 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff84ff9220 R15: 0000000000000000 FS: 00007f359b41f700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00070f000 CR3: 00000000171f0000 CR4: 0000000000350ef0 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:insert_entry fs/proc/proc_sysctl.c:161 [inline] RIP: 0010:insert_header+0x362/0xfc0 fs/proc/proc_sysctl.c:240 Code: c0 0f 84 c6 00 00 00 49 89 c4 e8 79 96 b0 ff 49 8d 7c 24 18 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 2b 09 00 00 49 8b 44 24 18 <48> 89 c2 48 c1 ea 03 80 3c 2a 00 0f 85 40 09 00 00 48 8d 78 40 4c RSP: 0018:ffff888009dcf2f0 EFLAGS: 00000246 RAX: ffff888046b2a000 RBX: ffff888046b2a2d8 RCX: ffffc90004606000 RDX: 0000000000040000 RSI: ffffffff81902667 RDI: ffff888046b2a308 RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888046b2a2f0 R13: 000000000000000c R14: ffffffff84910100 R15: 000000000000000f __register_sysctl_table+0x85e/0x1090 fs/proc/proc_sysctl.c:1354 __addrconf_sysctl_register+0x1db/0x3e0 net/ipv6/addrconf.c:7013 addrconf_sysctl_register net/ipv6/addrconf.c:7060 [inline] addrconf_sysctl_register+0x151/0x1e0 net/ipv6/addrconf.c:7049 ipv6_add_dev+0x92f/0x1150 net/ipv6/addrconf.c:444 addrconf_notify+0xb4f/0x2390 net/ipv6/addrconf.c:3538 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xb3/0x110 kernel/notifier.c:410 call_netdevice_notifiers_info+0xba/0x130 net/core/dev.c:2047 call_netdevice_notifiers_extack net/core/dev.c:2059 [inline] call_netdevice_notifiers net/core/dev.c:2073 [inline] register_netdevice+0x1068/0x1480 net/core/dev.c:10080 register_netdev+0x2d/0x50 net/core/dev.c:10173 sit_init_net+0x27f/0x520 net/ipv6/sit.c:1916 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: 0033:0x7f359decab19 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:00007f359b41f188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f359dfde020 RCX: 00007f359decab19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00000000200001c0 RBP: 00007f359df24f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcbcda734f R14: 00007f359b41f300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 1 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:711 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: e8 39 91 ff ff callq 0xffff913e 5: b8 ff ff ff ff mov $0xffffffff,%eax a: 48 83 c4 20 add $0x20,%rsp e: 65 0f c1 05 28 35 db xadd %eax,%gs:0x7edb3528(%rip) # 0x7edb353e 15: 7e 16: 83 f8 01 cmp $0x1,%eax 19: 4c 8b 54 24 08 mov 0x8(%rsp),%r10 1e: 0f 85 48 02 00 00 jne 0x26c 24: 41 52 push %r10 26: 9d popfq * 27: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction 2e: fc ff df 31: 48 01 c3 add %rax,%rbx 34: 48 c7 03 00 00 00 00 movq $0x0,(%rbx) 3b: 48 rex.W 3c: c7 .byte 0xc7