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BUG: KASAN: slab-out-of-bounds in nla_strlcpy+0x13d/0x150 lib/nlattr.c:314
Read of size 1 at addr ffff8801d3d6eb2d by task syz-executor0/24167

CPU: 0 PID: 24167 Comm: syz-executor0 Not tainted 4.17.0-rc7+ #96
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+0x1b9/0x294 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+0x242/0x2fe mm/kasan/report.c:412
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430
 nla_strlcpy+0x13d/0x150 lib/nlattr.c:314
 nfnl_acct_new+0x574/0xc50 net/netfilter/nfnetlink_acct.c:118
 nfnetlink_rcv_msg+0xdb5/0xff0 net/netfilter/nfnetlink.c:212
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2448
 nfnetlink_rcv+0x1fe/0x1ba0 net/netfilter/nfnetlink.c:513
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x58b/0x740 net/netlink/af_netlink.c:1336
 netlink_sendmsg+0x9f0/0xfa0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:629 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:639
 sock_write_iter+0x35a/0x5a0 net/socket.c:908
 call_write_iter include/linux/fs.h:1784 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x64d/0x960 fs/read_write.c:487
 vfs_write+0x1f8/0x560 fs/read_write.c:549
 ksys_write+0xf9/0x250 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __ia32_sys_write+0x71/0xb0 fs/read_write.c:607
 do_syscall_32_irqs_on arch/x86/entry/common.c:323 [inline]
 do_fast_syscall_32+0x345/0xf9b arch/x86/entry/common.c:394
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f71cb9
RSP: 002b:00000000f5f6d0ac EFLAGS: 00000282 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 0000000020000080
RDX: 000000000000001f RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 1:
 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
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490
 kmem_cache_alloc+0x12e/0x760 mm/slab.c:3554
 kmem_cache_zalloc include/linux/slab.h:691 [inline]
 __kernfs_new_node+0xe7/0x580 fs/kernfs/dir.c:633
 kernfs_new_node+0x80/0xf0 fs/kernfs/dir.c:679
 kernfs_create_dir_ns+0x3d/0x140 fs/kernfs/dir.c:1000
 kernfs_create_dir include/linux/kernfs.h:501 [inline]
 internal_create_group+0x110/0x970 fs/sysfs/group.c:122
 sysfs_create_group fs/sysfs/group.c:154 [inline]
 sysfs_create_groups+0x9b/0x150 fs/sysfs/group.c:181
 device_add_groups drivers/base/core.c:1033 [inline]
 device_add_attrs drivers/base/core.c:1192 [inline]
 device_add+0x1263/0x16d0 drivers/base/core.c:1813
 pmu_dev_alloc+0x234/0x3c0 kernel/events/core.c:9539
 perf_event_sysfs_init+0xd4/0x166 kernel/events/core.c:11723
 do_one_initcall+0x127/0x913 init/main.c:884
 do_initcall_level init/main.c:952 [inline]
 do_initcalls init/main.c:960 [inline]
 do_basic_setup init/main.c:978 [inline]
 kernel_init_freeable+0x49b/0x58e init/main.c:1135
 kernel_init+0x11/0x1b3 init/main.c:1061
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8801d3d6ea80
 which belongs to the cache kernfs_node_cache of size 160
The buggy address is located 13 bytes to the right of
 160-byte region [ffff8801d3d6ea80, ffff8801d3d6eb20)
The buggy address belongs to the page:
page:ffffea00074f5b80 count:1 mapcount:0 mapping:ffff8801d3d6e000 index:0xffff8801d3d6efee
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffff8801d3d6e000 ffff8801d3d6efee 0000000100000012
raw: ffffea00074f5a60 ffffea00074f5be0 ffff8801da988640 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d3d6ea00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
 ffff8801d3d6ea80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801d3d6eb00: 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00 00
                                  ^
 ffff8801d3d6eb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801d3d6ec00: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
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