8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device team0
audit: type=1400 audit(1544592509.246:38): avc: denied { associate } for pid=6204 comm="syz-executor5" name="syz5" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1
==================================================================
BUG: KASAN: use-after-free in tipc_group_find_dest net/tipc/group.c:255 [inline]
BUG: KASAN: use-after-free in tipc_group_cong+0x566/0x5d0 net/tipc/group.c:416
Read of size 8 at addr ffff8881c59f5000 by task syz-executor4/10565
CPU: 1 PID: 10565 Comm: syz-executor4 Not tainted 4.20.0-rc6+ #151
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x244/0x39d lib/dump_stack.c:113
print_address_description.cold.7+0x9/0x1ff mm/kasan/report.c:256
kasan_report_error mm/kasan/report.c:354 [inline]
kasan_report.cold.8+0x242/0x309 mm/kasan/report.c:412
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
tipc_group_find_dest net/tipc/group.c:255 [inline]
tipc_group_cong+0x566/0x5d0 net/tipc/group.c:416
tipc_send_group_anycast+0x9bb/0xc80 net/tipc/socket.c:972
__tipc_sendmsg+0x12b1/0x1d40 net/tipc/socket.c:1309
tipc_sendmsg+0x50/0x70 net/tipc/socket.c:1272
sock_sendmsg_nosec net/socket.c:621 [inline]
sock_sendmsg+0xd5/0x120 net/socket.c:631
___sys_sendmsg+0x7fd/0x930 net/socket.c:2116
__sys_sendmsg+0x11d/0x280 net/socket.c:2154
__do_sys_sendmsg net/socket.c:2163 [inline]
__se_sys_sendmsg net/socket.c:2161 [inline]
__x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457679
Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f813d748c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457679
RDX: 0000000000000000 RSI: 00000000200006c0 RDI: 0000000000000005
RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f813d7496d4
R13: 00000000004c44dd R14: 00000000004d74c8 R15: 00000000ffffffff
Allocated by task 10551:
save_stack+0x43/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553
kmem_cache_alloc_trace+0x152/0x750 mm/slab.c:3620
kmalloc include/linux/slab.h:546 [inline]
kzalloc include/linux/slab.h:741 [inline]
tipc_group_create+0x152/0xa70 net/tipc/group.c:171
tipc_sk_join net/tipc/socket.c:2829 [inline]
tipc_setsockopt+0x2d1/0xd70 net/tipc/socket.c:2944
__sys_setsockopt+0x1ba/0x3c0 net/socket.c:1902
__do_sys_setsockopt net/socket.c:1913 [inline]
__se_sys_setsockopt net/socket.c:1910 [inline]
__x64_sys_setsockopt+0xbe/0x150 net/socket.c:1910
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 10567:
save_stack+0x43/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521
kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
__cache_free mm/slab.c:3498 [inline]
kfree+0xcf/0x230 mm/slab.c:3817
tipc_group_delete+0x2e4/0x3f0 net/tipc/group.c:227
tipc_sk_leave+0x113/0x220 net/tipc/socket.c:2863
tipc_setsockopt+0x97d/0xd70 net/tipc/socket.c:2947
__sys_setsockopt+0x1ba/0x3c0 net/socket.c:1902
__do_sys_setsockopt net/socket.c:1913 [inline]
__se_sys_setsockopt net/socket.c:1910 [inline]
__x64_sys_setsockopt+0xbe/0x150 net/socket.c:1910
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff8881c59f5000
which belongs to the cache kmalloc-192 of size 192
The buggy address is located 0 bytes inside of
192-byte region [ffff8881c59f5000, ffff8881c59f50c0)
The buggy address belongs to the page:
page:ffffea0007167d40 count:1 mapcount:0 mapping:ffff8881da800040 index:0x0
flags: 0x2fffc0000000200(slab)
raw: 02fffc0000000200 ffffea0007160488 ffffea00071aff08 ffff8881da800040
raw: 0000000000000000 ffff8881c59f5000 0000000100000010 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8881c59f4f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8881c59f4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881c59f5000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881c59f5080: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff8881c59f5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================