EXT4-fs error (device sda1): ext4_xattr_set_entry:1605: inode #16489: comm syz-executor.2: corrupted xattr entries
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EXT4-fs error (device sda1): ext4_xattr_set_entry:1605: inode #16487: comm syz-executor.5: corrupted xattr entries
BUG: KASAN: use-after-free in memset include/linux/string.h:332 [inline]
BUG: KASAN: use-after-free in __ext4_expand_extra_isize+0x14f/0x220 fs/ext4/inode.c:5763
Write of size 2330 at addr ffff88804db12fa0 by task syz-executor.3/6898

CPU: 1 PID: 6898 Comm: syz-executor.3 Not tainted 4.14.149 #0
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+0x138/0x197 lib/dump_stack.c:53
 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393
 check_memory_region_inline mm/kasan/kasan.c:260 [inline]
 check_memory_region+0x123/0x190 mm/kasan/kasan.c:267
 memset+0x24/0x40 mm/kasan/kasan.c:285
 memset include/linux/string.h:332 [inline]
 __ext4_expand_extra_isize+0x14f/0x220 fs/ext4/inode.c:5763
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5815 [inline]
 ext4_mark_inode_dirty+0x664/0x860 fs/ext4/inode.c:5891
 ext4_unlink fs/ext4/namei.c:3083 [inline]
 ext4_unlink+0xae0/0xe90 fs/ext4/namei.c:3023
 vfs_unlink+0x281/0x480 fs/namei.c:4024
 do_unlinkat+0x33d/0x600 fs/namei.c:4089
 SYSC_unlink fs/namei.c:4136 [inline]
 SyS_unlink+0x1b/0x20 fs/namei.c:4134
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4597a7
RSP: 002b:00007fff159c5a68 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004597a7
RDX: 00007fff159c5a80 RSI: 00007fff159c5a80 RDI: 00007fff159c5b10
RBP: 00000000000000c9 R08: 0000000000000000 R09: 000000000000000b
R10: 0000000000000006 R11: 0000000000000246 R12: 00007fff159c6ba0
R13: 00000000025eb940 R14: 0000000000000000 R15: 00007fff159c6ba0

The buggy address belongs to the page:
page:ffffea000136c480 count:2 mapcount:0 mapping:ffff888218412560 index:0x43a
flags: 0x1fffc0000001074(referenced|dirty|lru|active|private)
raw: 01fffc0000001074 ffff888218412560 000000000000043a 00000002ffffffff
raw: ffffea00012a79a0 ffffea000136cca0 ffff888094484e70 ffff88821b7321c0
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff88821b7321c0

Memory state around the buggy address:
 ffff88804db12f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88804db12f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88804db13000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88804db13080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88804db13100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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