IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
8021q: adding VLAN 0 to HW filter on device batadv0
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:347 [inline]
BUG: KASAN: slab-out-of-bounds in pdu_read+0x8b/0xc0 net/9p/protocol.c:64
Read of size 10127 at addr ffff888087c9812d by task syz-executor.0/7396

CPU: 1 PID: 7396 Comm: syz-executor.0 Not tainted 4.14.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xf7/0x13b lib/dump_stack.c:58
 print_address_description.cold.7+0x9/0x1c9 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report.cold.8+0x11a/0x2d3 mm/kasan/report.c:409
 check_memory_region_inline mm/kasan/kasan.c:260 [inline]
 check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267
 memcpy+0x23/0x50 mm/kasan/kasan.c:302
 memcpy include/linux/string.h:347 [inline]
 pdu_read+0x8b/0xc0 net/9p/protocol.c:64
 p9pdu_vreadf net/9p/protocol.c:167 [inline]
 p9pdu_readf+0x32a/0x1640 net/9p/protocol.c:540
9pnet: Insufficient options for proto=fd
 p9_client_version net/9p/client.c:990 [inline]
 p9_client_create+0x7b8/0xf40 net/9p/client.c:1088
 v9fs_session_init+0x1e1/0x1410 fs/9p/v9fs.c:422
 v9fs_mount+0x73/0x770 fs/9p/vfs_super.c:135
 mount_fs+0x7f/0x269 fs/super.c:1237
 vfs_kern_mount.part.33+0x58/0x3c0 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0x36b/0x26a0 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xb8/0xd0 fs/namespace.c:3072
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459a09
RSP: 002b:00007f8779f52c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459a09
RDX: 00000000200000c0 RSI: 0000000020000480 RDI: 0000000000000000
RBP: 000000000075bf20 R08: 00000000200001c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8779f536d4
R13: 00000000004c5fa0 R14: 00000000004dac40 R15: 00000000ffffffff

Allocated by task 7396:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:551
 __do_kmalloc mm/slab.c:3720 [inline]
 __kmalloc+0x15b/0x7b0 mm/slab.c:3729
 kmalloc include/linux/slab.h:493 [inline]
 p9_fcall_alloc+0x1a/0x90 net/9p/client.c:242
 p9_tag_alloc net/9p/client.c:312 [inline]
 p9_client_prepare_req.part.9+0x579/0xab0 net/9p/client.c:728
 p9_client_prepare_req net/9p/client.c:763 [inline]
 p9_client_rpc+0x163/0xe80 net/9p/client.c:763
 p9_client_version net/9p/client.c:980 [inline]
 p9_client_create+0x737/0xf40 net/9p/client.c:1088
 v9fs_session_init+0x1e1/0x1410 fs/9p/v9fs.c:422
 v9fs_mount+0x73/0x770 fs/9p/vfs_super.c:135
 mount_fs+0x7f/0x269 fs/super.c:1237
 vfs_kern_mount.part.33+0x58/0x3c0 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0x36b/0x26a0 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xb8/0xd0 fs/namespace.c:3072
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff888087c98100
 which belongs to the cache kmalloc-16384 of size 16384
The buggy address is located 45 bytes inside of
 16384-byte region [ffff888087c98100, ffff888087c9c100)
The buggy address belongs to the page:
page:ffffea00021f2600 count:1 mapcount:0 mapping:ffff888087c98100 index:0x0 compound_mapcount: 0
flags: 0x1fffc0000008100(slab|head)
raw: 01fffc0000008100 ffff888087c98100 0000000000000000 0000000100000001
raw: ffffea00021ab220 ffffea0002353a20 ffff8880aa802200 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888087c9a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888087c9a080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888087c9a100: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff888087c9a180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888087c9a200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================