9pnet_virtio: no channels available for device (null)
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:345 [inline]
BUG: KASAN: slab-out-of-bounds in pdu_read+0x90/0xd0 net/9p/protocol.c:59
Read of size 65415 at addr ffff880197ddb4ad by task syz-executor5/24794

CPU: 0 PID: 24794 Comm: syz-executor5 Not tainted 4.18.0-rc5-next-20180720+ #12
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+0x1c9/0x2b4 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x30d mm/kasan/report.c:412
 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:345 [inline]
 pdu_read+0x90/0xd0 net/9p/protocol.c:59
 p9pdu_vreadf net/9p/protocol.c:162 [inline]
 p9pdu_readf+0x579/0x2170 net/9p/protocol.c:536
 p9_client_version net/9p/client.c:900 [inline]
 p9_client_create+0x6d0/0x1537 net/9p/client.c:974
 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400
 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135
 legacy_get_tree+0x131/0x460 fs/fs_context.c:674
 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1743
 do_new_mount fs/namespace.c:2603 [inline]
 do_mount+0x6f2/0x1e20 fs/namespace.c:2927
 ksys_mount+0x12d/0x140 fs/namespace.c:3143
 __do_sys_mount fs/namespace.c:3157 [inline]
 __se_sys_mount fs/namespace.c:3154 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3154
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455ab9
Code: 1d ba 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007fc94999fc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fc9499a06d4 RCX: 0000000000455ab9
RDX: 0000000020000340 RSI: 00000000200000c0 RDI: 0000000000000000
RBP: 000000000072bf48 R08: 0000000020000540 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c0201 R14: 00000000004cfe50 R15: 0000000000000001

Allocated by task 24794:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553
 __do_kmalloc mm/slab.c:3718 [inline]
 __kmalloc+0x14e/0x760 mm/slab.c:3727
 kmalloc include/linux/slab.h:518 [inline]
 p9_fcall_alloc+0x1e/0x90 net/9p/client.c:237
 p9_tag_alloc net/9p/client.c:267 [inline]
 p9_client_prepare_req.part.8+0x132/0xa00 net/9p/client.c:640
 p9_client_prepare_req net/9p/client.c:675 [inline]
 p9_client_rpc+0x242/0x1330 net/9p/client.c:675
 p9_client_version net/9p/client.c:890 [inline]
 p9_client_create+0xca4/0x1537 net/9p/client.c:974
 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400
 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135
 legacy_get_tree+0x131/0x460 fs/fs_context.c:674
 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1743
 do_new_mount fs/namespace.c:2603 [inline]
 do_mount+0x6f2/0x1e20 fs/namespace.c:2927
 ksys_mount+0x12d/0x140 fs/namespace.c:3143
 __do_sys_mount fs/namespace.c:3157 [inline]
 __se_sys_mount fs/namespace.c:3154 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3154
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 23287:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3498 [inline]
 kfree+0xd9/0x260 mm/slab.c:3813
 cfg80211_dev_free+0x2e8/0x420 net/wireless/core.c:998
 wiphy_dev_release+0x19/0x20 net/wireless/sysfs.c:82
 device_release+0x7e/0x210 drivers/base/core.c:891
 kobject_cleanup lib/kobject.c:643 [inline]
 kobject_release lib/kobject.c:672 [inline]
 kref_put include/linux/kref.h:70 [inline]
 kobject_put+0x194/0x280 lib/kobject.c:689
 put_device+0x20/0x30 drivers/base/core.c:2015
 wiphy_free+0x19/0x20 net/wireless/core.c:1003
 ieee80211_free_hw+0xc7/0x140 net/mac80211/main.c:1274
 mac80211_hwsim_new_radio+0x4c5/0x3490 drivers/net/wireless/mac80211_hwsim.c:2953
 hwsim_new_radio_nl+0x7c0/0xa80 drivers/net/wireless/mac80211_hwsim.c:3370
 genl_family_rcv_msg+0x8a3/0x1140 net/netlink/genetlink.c:601
 genl_rcv_msg+0xc6/0x168 net/netlink/genetlink.c:626
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2448
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:637
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x5a0/0x760 net/netlink/af_netlink.c:1336
 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:623 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:633
 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2107
 __sys_sendmsg+0x11d/0x290 net/socket.c:2145
 __do_sys_sendmsg net/socket.c:2154 [inline]
 __se_sys_sendmsg net/socket.c:2152 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2152
 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 ffff880197ddb480
 which belongs to the cache kmalloc-16384 of size 16384
The buggy address is located 45 bytes inside of
 16384-byte region [ffff880197ddb480, ffff880197ddf480)
The buggy address belongs to the page:
page:ffffea00065f7600 count:1 mapcount:0 mapping:ffff8801da802200 index:0x0 compound_mapcount: 0
flags: 0x2fffc0000010200(slab|head)
raw: 02fffc0000010200 ffffea000653cc08 ffffea0006d87808 ffff8801da802200
raw: 0000000000000000 ffff880197ddb480 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff880197ddd380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff880197ddd400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff880197ddd480: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff880197ddd500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff880197ddd580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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