IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
==================================================================
BUG: KASAN: slab-out-of-bounds in mqueue_get_tree+0x2a2/0x2e0 ipc/mqueue.c:362
Read of size 8 at addr ffff8801d7d6a9e8 by task syz-executor1/5639

CPU: 1 PID: 5639 Comm: syz-executor1 Not tainted 4.19.0-rc3-next-20180912+ #72
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+0x1d3/0x2c4 lib/dump_stack.c:113
 print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 mqueue_get_tree+0x2a2/0x2e0 ipc/mqueue.c:362
 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1787
 mq_create_mount+0xe3/0x190 ipc/mqueue.c:415
 mq_init_ns+0x15a/0x210 ipc/mqueue.c:1621
 create_ipc_ns ipc/namespace.c:58 [inline]
 copy_ipcs+0x3d2/0x580 ipc/namespace.c:84
 create_new_namespaces+0x376/0x900 kernel/nsproxy.c:87
 unshare_nsproxy_namespaces+0xc3/0x1f0 kernel/nsproxy.c:206
 ksys_unshare+0x79c/0x10b0 kernel/fork.c:2535
 __do_sys_unshare kernel/fork.c:2603 [inline]
 __se_sys_unshare kernel/fork.c:2601 [inline]
 __x64_sys_unshare+0x31/0x40 kernel/fork.c:2601
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459d87
Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 3d 8a fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 1d 8a fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff7e8eae98 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459d87
RDX: 0000000000000000 RSI: 00007fff7e8eaea0 RDI: 0000000008000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000018
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000412c30
R13: 0000000000412cc0 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 5639:
 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:513 [inline]
 create_ipc_ns ipc/namespace.c:45 [inline]
 copy_ipcs+0x1c6/0x580 ipc/namespace.c:84
 create_new_namespaces+0x376/0x900 kernel/nsproxy.c:87
 unshare_nsproxy_namespaces+0xc3/0x1f0 kernel/nsproxy.c:206
kobject: 'rx-0' (00000000e0012a36): fill_kobj_path: path = '/devices/virtual/net/lo/queues/rx-0'
 ksys_unshare+0x79c/0x10b0 kernel/fork.c:2535
 __do_sys_unshare kernel/fork.c:2603 [inline]
 __se_sys_unshare kernel/fork.c:2601 [inline]
 __x64_sys_unshare+0x31/0x40 kernel/fork.c:2601
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 0:
(stack is not available)
kobject: 'tx-0' (000000009f596c9b): kobject_add_internal: parent: 'queues', set: 'queues'

kobject: 'tx-0' (000000009f596c9b): kobject_uevent_env
The buggy address belongs to the object at ffff8801d7d6a2c0
 which belongs to the cache kmalloc-2048 of size 2048
kobject: 'tx-0' (000000009f596c9b): fill_kobj_path: path = '/devices/virtual/net/lo/queues/tx-0'
The buggy address is located 1832 bytes inside of
 2048-byte region [ffff8801d7d6a2c0, ffff8801d7d6aac0)
The buggy address belongs to the page:
page:ffffea00075f5a80 count:1 mapcount:0 mapping:ffff8801da800c40 index:0x0 compound_mapcount: 0
flags: 0x2fffc0000008100(slab|head)
raw: 02fffc0000008100 ffffea0006eb5488 ffffea0007608688 ffff8801da800c40
raw: 0000000000000000 ffff8801d7d6a2c0 0000000100000003 0000000000000000
kobject: 'lo' (00000000fb4ef3d3): kobject_add_internal: parent: 'net', set: 'devices'
page dumped because: kasan: bad access detected

kobject: 'lo' (00000000fb4ef3d3): kobject_uevent_env
Memory state around the buggy address:
 ffff8801d7d6a880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801d7d6a900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801d7d6a980: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
                                                          ^
 ffff8801d7d6aa00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801d7d6aa80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
kobject: 'lo' (00000000fb4ef3d3): fill_kobj_path: path = '/devices/virtual/net/lo'