device gre0 entered promiscuous mode
==================================================================
BUG: KASAN: slab-out-of-bounds in cap_convert_nscap+0x501/0x610 security/commoncap.c:498
Read of size 4 at addr ffff8801ce15f240 by task syz-executor5/8078

CPU: 1 PID: 8078 Comm: syz-executor5 Not tainted 4.15.0-rc4-next-20171221+ #78
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+0x194/0x257 lib/dump_stack.c:53
 print_address_description+0x73/0x250 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report+0x25b/0x340 mm/kasan/report.c:409
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429
 cap_convert_nscap+0x501/0x610 security/commoncap.c:498
 setxattr+0x365/0x400 fs/xattr.c:446
 path_setxattr+0x198/0x1e0 fs/xattr.c:472
 SYSC_lsetxattr fs/xattr.c:494 [inline]
 SyS_lsetxattr+0x38/0x50 fs/xattr.c:490
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452ac9
RSP: 002b:00007f2c22533c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f2c22534700 RCX: 0000000000452ac9
RDX: 0000000020d9ffec RSI: 0000000020182000 RDI: 0000000020664ff8
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a2f7ef R14: 00007f2c225349c0 R15: 0000000000000000

Allocated by task 8078:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
 __do_kmalloc_node mm/slab.c:3673 [inline]
 __kmalloc_node+0x47/0x70 mm/slab.c:3680
 kmalloc_node include/linux/slab.h:558 [inline]
 kvmalloc_node+0x99/0xd0 mm/util.c:397
 kvmalloc include/linux/mm.h:541 [inline]
 setxattr+0x152/0x400 fs/xattr.c:435
 path_setxattr+0x198/0x1e0 fs/xattr.c:472
 SYSC_lsetxattr fs/xattr.c:494 [inline]
 SyS_lsetxattr+0x38/0x50 fs/xattr.c:490
 entry_SYSCALL_64_fastpath+0x1f/0x96

Freed by task 3391:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3489 [inline]
 kfree+0xd6/0x260 mm/slab.c:3804
 simple_xattrs_free include/linux/xattr.h:97 [inline]
 shmem_evict_inode+0x1b0/0xb30 mm/shmem.c:1083
 evict+0x481/0x920 fs/inode.c:552
 iput_final fs/inode.c:1514 [inline]
 iput+0x7b9/0xaf0 fs/inode.c:1541
 dentry_unlink_inode+0x4b0/0x5e0 fs/dcache.c:375
 d_delete+0x1a7/0x250 fs/dcache.c:2366
 vfs_rmdir+0x32d/0x410 fs/namei.c:3889
 do_rmdir+0x4c8/0x5f0 fs/namei.c:3937
 SYSC_rmdir fs/namei.c:3955 [inline]
 SyS_rmdir+0x1a/0x20 fs/namei.c:3953
 entry_SYSCALL_64_fastpath+0x1f/0x96

The buggy address belongs to the object at ffff8801ce15f240
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
 32-byte region [ffff8801ce15f240, ffff8801ce15f260)
The buggy address belongs to the page:
page:000000007de49989 count:1 mapcount:0 mapping:000000008c0c8bc8 index:0xffff8801ce15ffc1
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffff8801ce15f000 ffff8801ce15ffc1 000000010000003f
raw: ffffea000739e8a0 ffffea00073697a0 ffff8801dac001c0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801ce15f100: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8801ce15f180: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff8801ce15f200: fb fb fb fb fc fc fc fc 01 fc fc fc fc fc fc fc
                                           ^
 ffff8801ce15f280: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8801ce15f300: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
==================================================================