batman_adv: batadv0: Removing interface: batadv_slave_1
==================================================================
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
BUG: KASAN: use-after-free in batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:711 [inline] at addr ffff8800b4d34100
BUG: KASAN: use-after-free in batadv_iv_ogm_queue_add+0x771/0x1150 net/batman-adv/bat_iv_ogm.c:828 at addr ffff8800b4d34100
Read of size 132 by task kworker/u4:5/2903
CPU: 0 PID: 2903 Comm: kworker/u4:5 Not tainted 4.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_send_outstanding_bat_ogm_packet
 0000000000000000 ffff8800b236f998 ffffffff82e49e02 ffff8800b4d34183
 ffff8800b236fa28 ffff8800b4d34100 ffff88012bc00000 ffff8800b4d341c0
 ffff8800b236fa18 ffffffff81745c18 0000000000000286 0000000000000003
Call Trace:
 [<ffffffff82e49e02>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff82e49e02>] dump_stack+0x136/0x1d4 lib/dump_stack.c:51
 [<ffffffff81745c18>] object_err mm/kasan/report.c:139 [inline]
 [<ffffffff81745c18>] print_address_description mm/kasan/report.c:180 [inline]
 [<ffffffff81745c18>] kasan_report_error+0x1e8/0x5b0 mm/kasan/report.c:276
 [<ffffffff81746314>] kasan_report+0x34/0x40 mm/kasan/report.c:298
 [<ffffffff81744ccd>] check_memory_region_inline mm/kasan/kasan.c:285 [inline]
 [<ffffffff81744ccd>] check_memory_region+0x13d/0x1a0 mm/kasan/kasan.c:299
 [<ffffffff81745143>] memcpy+0x23/0x50 mm/kasan/kasan.c:334
 [<ffffffff85cc0861>] batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:711 [inline]
 [<ffffffff85cc0861>] batadv_iv_ogm_queue_add+0x771/0x1150 net/batman-adv/bat_iv_ogm.c:828
 [<ffffffff85cc2fd2>] batadv_iv_ogm_schedule+0x912/0xc70 net/batman-adv/bat_iv_ogm.c:984
 [<ffffffff85d0f231>] batadv_schedule_bat_ogm net/batman-adv/send.c:448 [inline]
 [<ffffffff85d0f231>] batadv_send_outstanding_bat_ogm_packet+0x2f1/0x410 net/batman-adv/send.c:636
 [<ffffffff8138bf1c>] process_one_work+0x67c/0x14f0 kernel/workqueue.c:2096
 [<ffffffff8138ce6a>] worker_thread+0xda/0xf10 kernel/workqueue.c:2230
 [<ffffffff8139d919>] kthread+0x209/0x2d0 kernel/kthread.c:209
 [<ffffffff85dfe80f>] ret_from_fork+0x1f/0x40 arch/x86/entry/entry_64.S:389
Object at ffff8800b4d34100, in cache kmalloc-node
Object freed, allocated with size 132 bytes
Allocation:
PID = 2903
 [<ffffffff81208e26>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:67
 [<ffffffff81744fbd>] save_stack mm/kasan/kasan.c:476 [inline]
 [<ffffffff81744fbd>] set_track mm/kasan/kasan.c:488 [inline]
 [<ffffffff81744fbd>] kasan_kmalloc+0x11d/0x1b0 mm/kasan/kasan.c:586
 [<ffffffff81740ed2>] __do_kmalloc mm/slab.c:3773 [inline]
 [<ffffffff81740ed2>] __kmalloc+0x162/0x470 mm/slab.c:3782
 [<ffffffff85cefae7>] kmalloc include/linux/slab.h:483 [inline]
 [<ffffffff85cefae7>] batadv_tvlv_realloc_packet_buff net/batman-adv/main.c:885 [inline]
 [<ffffffff85cefae7>] batadv_tvlv_container_ogm_append+0x117/0x470 net/batman-adv/main.c:926
 [<ffffffff85cc30aa>] batadv_iv_ogm_schedule+0x9ea/0xc70 net/batman-adv/bat_iv_ogm.c:947
 [<ffffffff85d0f231>] batadv_schedule_bat_ogm net/batman-adv/send.c:448 [inline]
 [<ffffffff85d0f231>] batadv_send_outstanding_bat_ogm_packet+0x2f1/0x410 net/batman-adv/send.c:636
 [<ffffffff8138bf1c>] process_one_work+0x67c/0x14f0 kernel/workqueue.c:2096
 [<ffffffff8138ce6a>] worker_thread+0xda/0xf10 kernel/workqueue.c:2230
 [<ffffffff8139d919>] kthread+0x209/0x2d0 kernel/kthread.c:209
 [<ffffffff85dfe80f>] ret_from_fork+0x1f/0x40 arch/x86/entry/entry_64.S:389
Deallocation:
PID = 21
 [<ffffffff81208e26>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:67
 [<ffffffff817455f7>] save_stack mm/kasan/kasan.c:476 [inline]
 [<ffffffff817455f7>] set_track mm/kasan/kasan.c:488 [inline]
 [<ffffffff817455f7>] kasan_slab_free+0xd7/0x180 mm/kasan/kasan.c:540
 [<ffffffff81743443>] __cache_free mm/slab.c:3551 [inline]
 [<ffffffff81743443>] kfree+0xd3/0x2c0 mm/slab.c:3868
 [<ffffffff85cbe614>] batadv_iv_ogm_iface_disable+0x34/0x70 net/batman-adv/bat_iv_ogm.c:379
 [<ffffffff85ce96cc>] batadv_hardif_disable_interface+0x31c/0xbb0 net/batman-adv/hard-interface.c:602
 [<ffffffff85d11121>] batadv_softif_destroy_netlink+0xa1/0xc0 net/batman-adv/soft-interface.c:1040
 [<ffffffff84b9a741>] default_device_exit_batch+0x241/0x3d0 net/core/dev.c:8108
 [<ffffffff84b73fc6>] ops_exit_list.isra.0+0xd6/0x120 net/core/net_namespace.c:137
 [<ffffffff84b76380>] cleanup_net+0x2d0/0x540 net/core/net_namespace.c:431
 [<ffffffff8138bf1c>] process_one_work+0x67c/0x14f0 kernel/workqueue.c:2096
 [<ffffffff8138ce6a>] worker_thread+0xda/0xf10 kernel/workqueue.c:2230
 [<ffffffff8139d919>] kthread+0x209/0x2d0 kernel/kthread.c:209
 [<ffffffff85dfe80f>] ret_from_fork+0x1f/0x40 arch/x86/entry/entry_64.S:389
Memory state around the buggy address:
 ffff8800b4d34000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8800b4d34080: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8800b4d34100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff8800b4d34180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8800b4d34200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access[  420.611717] general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 2903 Comm: kworker/u4:5 Tainted: G    B           4.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_send_outstanding_bat_ogm_packet
task: ffff8800b2360640 ti: ffff8800b2368000 task.ti: ffff8800b2368000
RIP: 0010:[<ffffffff85cc011f>]  [<ffffffff85cc011f>] batadv_iv_ogm_queue_add+0x2f/0x1150 net/batman-adv/bat_iv_ogm.c:793
RSP: 0018:ffff8800b236faa8  EFLAGS: 00010292
RAX: dffffc0000000000 RBX: ffff8800a35a9280 RCX: ffff8800ba05e580
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: ffff8800b236fb48 R08: ffff8800a35a9280 R09: 0000000000000001
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000084
R13: 0000000000000000 R14: ffff8800ba05e580 R15: ffff8800b54ad080
FS:  0000000000000000(0000) GS:ffff88012c000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562c1786dd28 CR3: 00000000aef00000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 0000000000000000 0000000000000002 0000000000000000
 ffff8800b236fb48 0000000000000286 0000000000000000 ffffffff85cc2e41
 ffff880000000000 ffff8800ba05e580 ffff8800b54ad150 ffff8800ba05e580
Call Trace:
 [<ffffffff85cc2fd2>] batadv_iv_ogm_schedule+0x912/0xc70 net/batman-adv/bat_iv_ogm.c:984
 [<ffffffff85d0f231>] batadv_schedule_bat_ogm net/batman-adv/send.c:448 [inline]
 [<ffffffff85d0f231>] batadv_send_outstanding_bat_ogm_packet+0x2f1/0x410 net/batman-adv/send.c:636
 [<ffffffff8138bf1c>] process_one_work+0x67c/0x14f0 kernel/workqueue.c:2096
 [<ffffffff8138ce6a>] worker_thread+0xda/0xf10 kernel/workqueue.c:2230
 [<ffffffff8139d919>] kthread+0x209/0x2d0 kernel/kthread.c:209
 [<ffffffff85dfe80f>] ret_from_fork+0x1f/0x40 arch/x86/entry/entry_64.S:389
Code: 00 00 00 fc ff df 55 48 89 e5 41 57 49 89 ff 48 8d 7e 03 41 56 41 55 49 89 f5 41 54 41 89 d4 48 89 fa 48 c1 ea 03 53 48 83 ec 78 <0f> b6 04 02 48 89 fa 48 89 4d a8 83 e2 07 4c 89 45 b8 44 89 4d 
RIP  [<ffffffff85cc011f>] batadv_iv_ogm_queue_add+0x2f/0x1150 net/batman-adv/bat_iv_ogm.c:782
 RSP <ffff8800b236faa8>
---[ end trace f344a103df998cfd ]---