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BUG: KASAN: slab-out-of-bounds in __read_once_size include/linux/compiler.h:188 [inline]
BUG: KASAN: slab-out-of-bounds in list_empty include/linux/list.h:203 [inline]
BUG: KASAN: slab-out-of-bounds in shrink_slab_memcg mm/vmscan.c:595 [inline]
BUG: KASAN: slab-out-of-bounds in shrink_slab+0xa04/0xa60 mm/vmscan.c:671
kasan: CONFIG_KASAN_INLINE enabled
Read of size 8 at addr ffff8801c5576858 by task kswapd0/1534

CPU: 0 PID: 1534 Comm: kswapd0 Not tainted 4.18.0-rc4-next-20180713+ #7
kasan: GPF could be caused by NULL-ptr deref or user memory access
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
general protection fault: 0000 [#1] SMP KASAN
CPU: 1 PID: 22870 Comm: syz-executor0 Not tainted 4.18.0-rc4-next-20180713+ #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:list_lru_from_memcg_idx mm/list_lru.c:59 [inline]
RIP: 0010:list_lru_count_one+0x2d8/0x460 mm/list_lru.c:201
Code: 
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
48 
8d 65 
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x30d mm/kasan/report.c:412
d8 
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
5b 
 __read_once_size include/linux/compiler.h:188 [inline]
 list_empty include/linux/list.h:203 [inline]
 shrink_slab_memcg mm/vmscan.c:595 [inline]
 shrink_slab+0xa04/0xa60 mm/vmscan.c:671
41 
5c 
41 
5d 
 shrink_node+0x429/0x16a0 mm/vmscan.c:2735
41 
5e 
41 
5f 
5d 
c3 
e8 
fe 
33 
 kswapd_shrink_node mm/vmscan.c:3457 [inline]
 balance_pgdat+0x7ca/0x1010 mm/vmscan.c:3567
d2 
ff 
4b 
8d 
 kswapd+0x82e/0x12f0 mm/vmscan.c:3789
7c 
fd 
10 
48 
b8 
00 
00 
00 
00 
00 
fc 
 kthread+0x345/0x410 kernel/kthread.c:246
ff 
df 
48 
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415
89 

fa 
Allocated by task 21573:
48 
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
c1 
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553
ea 
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490
03 
 kmem_cache_alloc+0x12e/0x760 mm/slab.c:3554
<80> 
 getname_flags+0xd0/0x5a0 fs/namei.c:140
3c 
 user_path_at_empty+0x2d/0x50 fs/namei.c:2625
02 
 user_path_at include/linux/namei.h:57 [inline]
 do_faccessat+0x252/0x7e0 fs/open.c:378
00 
 __do_sys_access fs/open.c:430 [inline]
 __se_sys_access fs/open.c:428 [inline]
 __x64_sys_access+0x59/0x80 fs/open.c:428
0f 
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
85 
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
65 

01 
Freed by task 21573:
00 00 
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
4b 
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521
8b 
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
5c 
 __cache_free mm/slab.c:3498 [inline]
 kmem_cache_free+0x86/0x2d0 mm/slab.c:3756
fd 
 putname+0xf2/0x130 fs/namei.c:261
10 
 filename_lookup+0x397/0x510 fs/namei.c:2371
e9 
 user_path_at_empty+0x40/0x50 fs/namei.c:2625
18 
 user_path_at include/linux/namei.h:57 [inline]
 do_faccessat+0x252/0x7e0 fs/open.c:378
ff 
 __do_sys_access fs/open.c:430 [inline]
 __se_sys_access fs/open.c:428 [inline]
 __x64_sys_access+0x59/0x80 fs/open.c:428
ff 
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
ff 
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
e8 cf 

The buggy address belongs to the object at ffff8801c5576ec0
 which belongs to the cache names_cache of size 4096
RSP: 0018:ffff8801244e69d0 EFLAGS: 00010206
The buggy address is located 1640 bytes to the left of
 4096-byte region [ffff8801c5576ec0, ffff8801c5577ec0)
The buggy address belongs to the page:
RAX: dffffc0000000000 RBX: ffff8801840b6b00 RCX: ffffc90002005000
page:ffffea0007155d80 count:1 mapcount:0 mapping:ffff8801da987dc0 index:0x0
RDX: 0000000000000003 RSI: ffffffff81aa3c52 RDI: 000000000000001a
 compound_mapcount: 0
RBP: ffff8801244e6a60 R08: ffff880197634000 R09: 0000000000000000
R10: ffffed003ae3c3b8 R11: ffff8801d71e1dc7 R12: 1ffff1002489cd3b
flags: 0x2fffc0000008100(slab|head)
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000001
raw: 02fffc0000008100 ffffea00063a7f08 ffffea0006e00208 ffff8801da987dc0
FS:  00007f5132059700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
raw: 0000000000000000 ffff8801c5576ec0 0000000100000001 0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
page dumped because: kasan: bad access detected
CR2: 00007ffeb4471000 CR3: 00000001be726000 CR4: 00000000001406e0

DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000400
Memory state around the buggy address:
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ffff8801c5576700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801c5576780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 list_lru_shrink_count include/linux/list_lru.h:122 [inline]
 super_cache_count+0x153/0x2e0 fs/super.c:146
>ffff8801c5576800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 do_shrink_slab+0x148/0xc50 mm/vmscan.c:458
                                                    ^
 ffff8801c5576880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801c5576900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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