batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:9442] Modules linked in: irq event stamp: 4343681 hardirqs last enabled at (4343680): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (4343681): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (2052): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (2873): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (2873): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 0 PID: 9442 Comm: syz-executor.3 Not tainted 4.14.264-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809dd80380 task.stack: ffff8880b3070000 RIP: 0010:__read_once_size_nocheck.constprop.0+0x0/0x10 include/linux/compiler.h:203 RSP: 0018:ffff8880ba4070d0 EFLAGS: 00000283 ORIG_RAX: ffffffffffffff10 RAX: ffff8880b3078000 RBX: 1ffff11017480e1c RCX: ffffffff8a719a3e RDX: ffff8880ba407258 RSI: ffff8880ba407100 RDI: ffff8880b30777b8 RBP: ffff8880b30777b8 R08: ffffffff8a719a42 R09: ffffffff8a719a43 R10: 000000000001c0d5 R11: 0000000000000001 R12: ffff8880ba407210 R13: ffff8880ba407258 R14: ffff8880b3070000 R15: ffff8880ba407210 FS: 00007fa8b6880700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff4d7004000 CR3: 00000000b2d59000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: deref_stack_reg arch/x86/kernel/unwind_orc.c:289 [inline] deref_stack_reg+0x124/0x1a0 arch/x86/kernel/unwind_orc.c:283 Bluetooth: hci0 command 0x0419 tx timeout unwind_next_frame+0xc98/0x17d0 arch/x86/kernel/unwind_orc.c:425 Bluetooth: hci5 command 0x0419 tx timeout __save_stack_trace+0x90/0x160 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! kmem_cache_alloc_node+0x146/0x410 mm/slab.c:3642 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 __alloc_skb+0x5c/0x510 net/core/skbuff.c:193 __pskb_copy_fclone+0x100/0xc90 net/core/skbuff.c:1395 __pskb_copy include/linux/skbuff.h:1034 [inline] create_tagged_skb net/hsr/hsr_forward.c:166 [inline] frame_get_tagged_skb net/hsr/hsr_forward.c:202 [inline] hsr_forward_do net/hsr/hsr_forward.c:283 [inline] hsr_forward_skb+0x766/0x19c0 net/hsr/hsr_forward.c:373 hsr_dev_xmit+0x6b/0xa0 net/hsr/hsr_device.c:242 __netdev_start_xmit include/linux/netdevice.h:4051 [inline] netdev_start_xmit include/linux/netdevice.h:4060 [inline] xmit_one net/core/dev.c:3005 [inline] dev_hard_start_xmit+0x188/0x890 net/core/dev.c:3021 __dev_queue_xmit+0x1d7f/0x2480 net/core/dev.c:3521 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! neigh_connected_output+0x39c/0x580 net/core/neighbour.c:1398 neigh_output include/net/neighbour.h:500 [inline] ip6_finish_output2+0xf48/0x1f10 net/ipv6/ip6_output.c:120 IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready batman_adv: batadv0: Interface activated: batadv_slave_0 ip6_finish_output+0x5c6/0xd50 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c5/0x660 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:470 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0x82a/0x1390 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x2bb/0x5a0 net/ipv6/addrconf.c:3769 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:hash_64_generic include/linux/hash.h:81 [inline] RIP: 0010:get_bucket lib/debugobjects.c:274 [inline] RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:734 [inline] RIP: 0010:debug_check_no_obj_freed+0xf0/0x680 lib/debugobjects.c:776 RSP: 0018:ffff8880b3077580 EFLAGS: 00000a87 ORIG_RAX: ffffffffffffff10 RAX: ba3b0e4ea57e0f90 RBX: dffffc0000000000 RCX: 61c8864680b583eb RDX: 0000000000000004 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff8880b3077628 R08: 1ffff110470e16ff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888089a00000 R13: 0000000000000004 R14: ffffffff8c00c588 R15: 0000000000000000 free_pages_prepare mm/page_alloc.c:1064 [inline] __free_pages_ok+0x215/0xeb0 mm/page_alloc.c:1262 release_pages+0x779/0xbf0 mm/swap.c:788 tlb_flush_mmu_free+0xc1/0x1a0 mm/memory.c:272 zap_pte_range mm/memory.c:1431 [inline] zap_pmd_range mm/memory.c:1466 [inline] zap_pud_range mm/memory.c:1495 [inline] zap_p4d_range mm/memory.c:1516 [inline] unmap_page_range+0x1533/0x1ce0 mm/memory.c:1537 unmap_single_vma+0x147/0x2b0 mm/memory.c:1582 unmap_vmas+0x9d/0x160 mm/memory.c:1612 exit_mmap+0x270/0x4d0 mm/mmap.c:3058 __mmput kernel/fork.c:931 [inline] mmput kernel/fork.c:952 [inline] mmput+0xfa/0x420 kernel/fork.c:947 exit_mm kernel/exit.c:548 [inline] do_exit+0x984/0x2850 kernel/exit.c:855 do_group_exit+0x100/0x2e0 kernel/exit.c:965 get_signal+0x38d/0x1ca0 kernel/signal.c:2412 do_signal+0x7c/0x1550 arch/x86/kernel/signal.c:792 exit_to_usermode_loop+0x160/0x200 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fa8b710b059 RSP: 002b:00007fa8b6880218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fa8b721df68 RCX: 00007fa8b710b059 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa8b721df68 RBP: 00007fa8b721df60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa8b721df6c R13: 00007ffe44979fcf R14: 00007fa8b6880300 R15: 0000000000022000 Code: 03 80 3c 02 00 75 18 48 8b 43 48 5b 5d c3 e8 28 7e 5b 00 eb a8 48 89 ef e8 8e 7e 5b 00 eb c4 48 89 ef e8 84 7e 5b 00 eb de 66 90 <48> 8b 07 48 89 06 c3 66 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7990 Comm: syz-executor.3 Not tainted 4.14.264-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880b2c90240 task.stack: ffff88809bf88000 RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x185/0x370 kernel/smp.c:302 RSP: 0000:ffff88809bf8f980 EFLAGS: 00000297 RAX: 0000000000000003 RBX: 1ffff110137f1f34 RCX: 1ffff11016592162 RDX: 0000000000000000 RSI: ffff8880b2c90af0 RDI: 0000000000000286 RBP: ffff88809bf8fa30 R08: ffffffff8b9cf618 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88809bf8fae8 R14: 0000000000000001 R15: 0000000000000001 FS: 0000555555d91400(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555d9a848 CR3: 00000000b2d59000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many+0x60f/0x7a0 kernel/smp.c:434 flush_tlb_others arch/x86/include/asm/paravirt.h:309 [inline] flush_tlb_mm_range+0x158/0x2f0 arch/x86/mm/tlb.c:709 flush_tlb_page arch/x86/include/asm/tlbflush.h:573 [inline] ptep_clear_flush+0xde/0x110 mm/pgtable-generic.c:87 wp_page_copy+0xa09/0x25c0 mm/memory.c:2642 do_wp_page+0x245/0x1db0 mm/memory.c:2887 handle_pte_fault mm/memory.c:4108 [inline] __handle_mm_fault+0x234f/0x4620 mm/memory.c:4216 handle_mm_fault+0x455/0x9c0 mm/memory.c:4253 __do_page_fault+0x549/0xad0 arch/x86/mm/fault.c:1442 page_fault+0x45/0x50 arch/x86/entry/entry_64.S:1123 RIP: 8040:0x804 RSP: b71f15e0:0000000000008030 EFLAGS: 00000802 Code: 8b 54 24 10 4c 89 e9 8b 7c 24 1c 48 8d 74 24 40 e8 71 fa ff ff 41 89 c4 8b 44 24 58 a8 01 74 0f e8 a1 c6 08 00 f3 90 8b 44 24 58 01 75 f1 e8 92 c6 08 00 e8 8d c6 08 00 bf 01 00 00 00 e8 23 ---------------- Code disassembly (best guess): 0: 03 80 3c 02 00 75 add 0x7500023c(%rax),%eax 6: 18 48 8b sbb %cl,-0x75(%rax) 9: 43 rex.XB a: 48 5b rex.W pop %rbx c: 5d pop %rbp d: c3 retq e: e8 28 7e 5b 00 callq 0x5b7e3b 13: eb a8 jmp 0xffffffbd 15: 48 89 ef mov %rbp,%rdi 18: e8 8e 7e 5b 00 callq 0x5b7eab 1d: eb c4 jmp 0xffffffe3 1f: 48 89 ef mov %rbp,%rdi 22: e8 84 7e 5b 00 callq 0x5b7eab 27: eb de jmp 0x7 29: 66 90 xchg %ax,%ax * 2b: 48 8b 07 mov (%rdi),%rax <-- trapping instruction 2e: 48 89 06 mov %rax,(%rsi) 31: c3 retq 32: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 39: 00 00 3b: 48 rex.W 3c: b8 .byte 0xb8 3d: 00 00 add %al,(%rax)