usercopy: Kernel memory overwrite attempt detected to SLAB object 'names_cache' (offset 1756, size 4068)!
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kernel BUG at mm/usercopy.c:100!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 22405 Comm: blkid Not tainted 4.16.0+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:usercopy_abort+0xbb/0xbd mm/usercopy.c:88
RSP: 0018:ffff88019a8e7a48 EFLAGS: 00010286
RAX: 0000000000000069 RBX: ffffffff887990d4 RCX: 0000000000000000
RDX: 0000000000000069 RSI: ffffffff815f7e01 RDI: ffffed003351cf3f
RBP: ffff88019a8e7aa0 R08: ffff8801b4e481c0 R09: ffffed003b624fb0
R10: ffffed003b624fb0 R11: ffff8801db127d87 R12: ffffffff87b2e100
R13: ffffffff87b2e040 R14: ffffffff87b2e000 R15: ffffffff87b31ce0
FS:  0000000000000000(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc03989020 CR3: 00000001bf164000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __check_heap_object+0xb5/0xb5 mm/slab.c:4431
 check_heap_object mm/usercopy.c:236 [inline]
 __check_object_size+0x4c7/0x5d9 mm/usercopy.c:259
 check_object_size include/linux/thread_info.h:112 [inline]
 strncpy_from_user+0x109/0x500 lib/strncpy_from_user.c:116
 getname_flags+0x113/0x5a0 fs/namei.c:149
 user_path_at_empty+0x2d/0x50 fs/namei.c:2569
 user_path_at include/linux/namei.h:57 [inline]
 do_faccessat+0x24a/0x7c0 fs/open.c:389
 SYSC_access fs/open.c:441 [inline]
 SyS_access+0x22/0x30 fs/open.c:439
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7f3bd0e03267
RSP: 002b:00007ffc0389f798 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3bd0e03267
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f3bd0e072e6
RBP: 00007ffc0389f830 R08: 000000000000003c R09: 0000000000000000
R10: 00007ffc03989120 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000004 R14: 00007f3bd100e758 R15: 00007f3bd0e07931
Code: 55 c0 e8 e0 2f bc ff ff 75 c8 48 8b 55 c0 4d 89 f9 ff 75 d0 4d 89 e8 48 89 d9 4c 89 e6 41 56 48 c7 c7 a0 e2 b2 87 e8 74 9e a4 ff <0f> 0b e8 b5 2f bc ff e8 70 ae f7 ff 8b 95 14 ff ff ff 4d 89 e8 
RIP: usercopy_abort+0xbb/0xbd mm/usercopy.c:88 RSP: ffff88019a8e7a48
---[ end trace 2f5a0d4fee6fe39b ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..