EXT4-fs error (device sda1): ext4_xattr_set_entry:1605: inode #16483: comm syz-executor.3: corrupted xattr entries
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BUG: KASAN: use-after-free in memset include/linux/string.h:332 [inline]
BUG: KASAN: use-after-free in __ext4_expand_extra_isize.isra.0+0x10b/0x1c0 fs/ext4/inode.c:5832
Write of size 736 at addr ffff8881b3021fa0 by task syz-fuzzer/1794

CPU: 1 PID: 1794 Comm: syz-fuzzer Not tainted 4.14.154+ #0
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xe5/0x154 lib/dump_stack.c:58
 print_address_description+0x60/0x226 mm/kasan/report.c:187
 __kasan_report.cold+0x1a/0x41 mm/kasan/report.c:316
 memset+0x20/0x40 mm/kasan/common.c:113
 memset include/linux/string.h:332 [inline]
 __ext4_expand_extra_isize.isra.0+0x10b/0x1c0 fs/ext4/inode.c:5832
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5884 [inline]
 ext4_mark_inode_dirty+0x471/0x7f0 fs/ext4/inode.c:5960
 ext4_rmdir fs/ext4/namei.c:3133 [inline]
 ext4_rmdir+0x8a7/0xbc0 fs/ext4/namei.c:3066
 vfs_rmdir2 fs/namei.c:4032 [inline]
 vfs_rmdir2+0x214/0x410 fs/namei.c:4010
 do_rmdir+0x28a/0x340 fs/namei.c:4098
 SYSC_unlinkat fs/namei.c:4268 [inline]
 SyS_unlinkat+0x52/0x70 fs/namei.c:4262
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x47fd44
RSP: 002b:000000c432dc5880 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fd44
RDX: 0000000000000200 RSI: 000000c423f35d80 RDI: ffffffffffffff9c
RBP: 000000c432dc58e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000018 R14: 0000000000000011 R15: 0000000000000018

The buggy address belongs to the page:
page:ffffea0006cc0840 count:2 mapcount:0 mapping:ffff8881da4170d0 index:0x458
flags: 0x400000000000203a(referenced|dirty|lru|active|private)
raw: 400000000000203a ffff8881da4170d0 0000000000000458 00000002ffffffff
raw: ffffea000703b060 ffffea0006bb9ea0 ffff8881c3af80a8 ffff8881da81aa80
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff8881da81aa80

Memory state around the buggy address:
 ffff8881b3021f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881b3021f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881b3022000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8881b3022080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881b3022100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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