device veth1_macvtap entered promiscuous mode
IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready
==================================================================
IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready
BUG: KASAN: use-after-free in xfrm6_tunnel_free_spi net/ipv6/xfrm6_tunnel.c:208 [inline]
BUG: KASAN: use-after-free in xfrm6_tunnel_destroy+0x519/0x5c0 net/ipv6/xfrm6_tunnel.c:303
Read of size 8 at addr ffff888052865890 by task kworker/1:0/18
CPU: 1 PID: 18 Comm: kworker/1:0 Not tainted 4.14.177-syzkaller #0
IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events xfrm_state_gc_task
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x13e/0x194 lib/dump_stack.c:58
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
print_address_description.cold+0x7c/0x1e2 mm/kasan/report.c:252
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report mm/kasan/report.c:409 [inline]
kasan_report.cold+0xa9/0x2ae mm/kasan/report.c:393
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
xfrm6_tunnel_free_spi net/ipv6/xfrm6_tunnel.c:208 [inline]
xfrm6_tunnel_destroy+0x519/0x5c0 net/ipv6/xfrm6_tunnel.c:303
xfrm_state_gc_destroy net/xfrm/xfrm_state.c:449 [inline]
xfrm_state_gc_task+0x4ad/0x7d0 net/xfrm/xfrm_state.c:472
process_one_work+0x813/0x1540 kernel/workqueue.c:2116
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
worker_thread+0x5d1/0x1070 kernel/workqueue.c:2250
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
kthread+0x30d/0x420 kernel/kthread.c:232
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
Allocated by task 6353:
save_stack+0x32/0xa0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc mm/kasan/kasan.c:551 [inline]
kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
__do_kmalloc mm/slab.c:3720 [inline]
__kmalloc+0x15b/0x7c0 mm/slab.c:3729
kmalloc include/linux/slab.h:493 [inline]
kzalloc include/linux/slab.h:661 [inline]
ops_init+0xe7/0x3c0 net/core/net_namespace.c:108
setup_net+0x22f/0x500 net/core/net_namespace.c:295
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready
copy_net_ns+0x19b/0x440 net/core/net_namespace.c:419
create_new_namespaces+0x375/0x730 kernel/nsproxy.c:107
unshare_nsproxy_namespaces+0xa5/0x1e0 kernel/nsproxy.c:206
SYSC_unshare kernel/fork.c:2391 [inline]
SyS_unshare+0x2ea/0x740 kernel/fork.c:2341
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
batman_adv: batadv0: Interface activated: batadv_slave_0
Freed by task 6270:
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
save_stack+0x32/0xa0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3496 [inline]
kfree+0xcb/0x260 mm/slab.c:3815
ops_free net/core/net_namespace.c:132 [inline]
ops_free_list.part.0+0x1f9/0x330 net/core/net_namespace.c:154
ops_free_list net/core/net_namespace.c:152 [inline]
cleanup_net+0x453/0x820 net/core/net_namespace.c:488
process_one_work+0x813/0x1540 kernel/workqueue.c:2116
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
worker_thread+0x5d1/0x1070 kernel/workqueue.c:2250
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
The buggy address belongs to the object at ffff888052865640
which belongs to the cache kmalloc-8192 of size 8192
The buggy address is located 592 bytes inside of
8192-byte region [ffff888052865640, ffff888052867640)
The buggy address belongs to the page:
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
page:ffffea00014a1900 count:1 mapcount:0 mapping:ffff888052865640 index:0x0 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffff888052865640 0000000000000000 0000000100000001
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
raw: ffffea00014ffe20 ffffea00014a2120 ffff88812fe44080 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888052865780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888052865800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888052865880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
^
ffff888052865900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888052865980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!