IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
================================================================================
UBSAN: Undefined behaviour in ./arch/x86/include/asm/atomic.h:156:9
signed integer overflow:
-1284631236 + -1347599334 cannot be represented in type 'int'
CPU: 0 PID: 7573 Comm: modprobe Not tainted 4.7.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 ffff88012c007020 ffffffff83778841 1ffffffff1177866
 0000000041b58ab3 ffffffff884c4ca7 ffffffff83778684 0000000000000086
 ffffffff00000028 ffff88012c007048 ffff88012c006ff8 ffff88012c007010
Call Trace:
 <IRQ>  [<ffffffff83778841>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ>  [<ffffffff83778841>] dump_stack+0x1bd/0x29c lib/dump_stack.c:51
 [<ffffffff838a036d>] ubsan_epilogue+0xd/0x8a lib/ubsan.c:164
 [<ffffffff838a1be2>] handle_overflow+0x202/0x23d lib/ubsan.c:195
 [<ffffffff838a1c2b>] __ubsan_handle_add_overflow+0xe/0x10 lib/ubsan.c:203
 [<ffffffff86252ff8>] atomic_add_return arch/x86/include/asm/atomic.h:156 [inline]
 [<ffffffff86252ff8>] ip_idents_reserve+0xf8/0x140 net/ipv4/route.c:484
 [<ffffffff862537c3>] __ip_select_ident+0x183/0x260 net/ipv4/route.c:499
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
 [<ffffffff8640d094>] iptunnel_xmit+0x534/0xaa0 net/ipv4/ip_tunnel_core.c:98
 [<ffffffff86459ca4>] udp_tunnel_xmit_skb+0x234/0x400 net/ipv4/udp_tunnel.c:159
 [<ffffffff847d8740>] geneve_xmit_skb drivers/net/geneve.c:911 [inline]
 [<ffffffff847d8740>] geneve_xmit+0x7d0/0x4280 drivers/net/geneve.c:1034
 [<ffffffff85cae264>] __netdev_start_xmit include/linux/netdevice.h:3980 [inline]
 [<ffffffff85cae264>] netdev_start_xmit include/linux/netdevice.h:3989 [inline]
 [<ffffffff85cae264>] xmit_one net/core/dev.c:2919 [inline]
 [<ffffffff85cae264>] dev_hard_start_xmit+0x184/0xb10 net/core/dev.c:2935
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
 [<ffffffff85cb04c8>] __dev_queue_xmit+0x1448/0x2970 net/core/dev.c:3405
 [<ffffffff85cb19fb>] dev_queue_xmit+0xb/0x10 net/core/dev.c:3438
 [<ffffffff85cddb64>] neigh_resolve_output+0x4b4/0x8f0 net/core/neighbour.c:1307
 [<ffffffff8656152e>] dst_neigh_output include/net/dst.h:464 [inline]
 [<ffffffff8656152e>] ip6_finish_output2+0xe0e/0x2370 net/ipv6/ip6_output.c:113
 [<ffffffff8656cc3b>] ip6_finish_output+0x2fb/0x830 net/ipv6/ip6_output.c:131
 [<ffffffff8656d306>] NF_HOOK_COND include/linux/netfilter.h:233 [inline]
 [<ffffffff8656d306>] ip6_output+0x196/0x6d0 net/ipv6/ip6_output.c:145
 [<ffffffff8660a025>] dst_output include/net/dst.h:501 [inline]
 [<ffffffff8660a025>] NF_HOOK_THRESH include/linux/netfilter.h:219 [inline]
 [<ffffffff8660a025>] NF_HOOK include/linux/netfilter.h:242 [inline]
 [<ffffffff8660a025>] mld_sendpack+0x785/0x1180 net/ipv6/mcast.c:1646
 [<ffffffff8660fed2>] mld_send_cr net/ipv6/mcast.c:1927 [inline]
 [<ffffffff8660fed2>] mld_ifc_timer_expire+0x3d2/0x780 net/ipv6/mcast.c:2425
 [<ffffffff815f4fdb>] call_timer_fn+0x1ab/0x890 kernel/time/timer.c:1298
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
 [<ffffffff815f5a12>] expire_timers+0x352/0x700 kernel/time/timer.c:1338
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
 [<ffffffff815f5f81>] __run_timers kernel/time/timer.c:1624 [inline]
 [<ffffffff815f5f81>] run_timer_softirq+0x1c1/0x5e0 kernel/time/timer.c:1637
 [<ffffffff87491282>] __do_softirq+0x2e2/0xf20 kernel/softirq.c:273
 [<ffffffff814287cb>] invoke_softirq kernel/softirq.c:350 [inline]
 [<ffffffff814287cb>] irq_exit+0x13b/0x250 kernel/softirq.c:391
 [<ffffffff874907d0>] exiting_irq arch/x86/include/asm/apic.h:657 [inline]
 [<ffffffff874907d0>] smp_apic_timer_interrupt+0x80/0xb0 arch/x86/kernel/apic/apic.c:934
 [<ffffffff8748ea7c>] apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:618
 <EOI>  [<ffffffff81271993>] ? dump_trace+0x63/0x7f0 arch/x86/kernel/dumpstack_64.c:156
 [<ffffffff8129f976>] save_stack_trace+0x26/0x80 arch/x86/kernel/stacktrace.c:67
 [<ffffffff8198638e>] save_stack mm/kasan/kasan.c:479 [inline]
 [<ffffffff8198638e>] set_track mm/kasan/kasan.c:491 [inline]
 [<ffffffff8198638e>] kasan_kmalloc+0xee/0x180 mm/kasan/kasan.c:582
 [<ffffffff81986922>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:521
 [<ffffffff819803d3>] slab_post_alloc_hook mm/slab.h:417 [inline]
 [<ffffffff819803d3>] slab_alloc mm/slab.c:3412 [inline]
 [<ffffffff819803d3>] kmem_cache_alloc+0x1a3/0x7f0 mm/slab.c:3571
 [<ffffffff81913db6>] anon_vma_alloc mm/rmap.c:78 [inline]
 [<ffffffff81913db6>] anon_vma_prepare+0x236/0x490 mm/rmap.c:187
 [<ffffffff818df327>] do_cow_fault mm/memory.c:3208 [inline]
 [<ffffffff818df327>] do_fault+0x787/0x2bc0 mm/memory.c:3324
 [<ffffffff818e9ccc>] handle_pte_fault mm/memory.c:3521 [inline]
 [<ffffffff818e9ccc>] __handle_mm_fault mm/memory.c:3608 [inline]
 [<ffffffff818e9ccc>] handle_mm_fault+0x112c/0x1d90 mm/memory.c:3645
 [<ffffffff81327cfa>] __do_page_fault+0x2aa/0xb80 arch/x86/mm/fault.c:1356
 [<ffffffff8132864a>] do_page_fault+0x4a/0x70 arch/x86/mm/fault.c:1419
 [<ffffffff8748ff88>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:920
================================================================================
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready