EXT4-fs error (device sda1): ext4_xattr_set_entry:1602: inode #16995: comm syz-executor3: corrupted xattr entries
EXT4-fs error (device sda1): ext4_xattr_set_entry:1602: inode #16995: comm syz-executor3: corrupted xattr entries
EXT4-fs error (device sda1): ext4_xattr_set_entry:1602: inode #16995: comm syz-executor4: corrupted xattr entries
EXT4-fs error (device sda1): ext4_xattr_set_entry:1602: inode #16995: comm syz-executor3: corrupted xattr entries
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BUG: KASAN: use-after-free in memset include/linux/string.h:329 [inline]
BUG: KASAN: use-after-free in __ext4_expand_extra_isize.isra.13+0x108/0x1b0 fs/ext4/inode.c:5780
Write of size 32736 at addr ffff8801adb00da0 by task syz-executor4/1846

CPU: 0 PID: 1846 Comm: syz-executor4 Not tainted 4.14.78+ #26
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x11b lib/dump_stack.c:53
 print_address_description+0x60/0x22b mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report.cold.6+0x11b/0x2dd mm/kasan/report.c:409
 memset+0x1f/0x40 mm/kasan/kasan.c:285
 memset include/linux/string.h:329 [inline]
 __ext4_expand_extra_isize.isra.13+0x108/0x1b0 fs/ext4/inode.c:5780
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5832 [inline]
 ext4_mark_inode_dirty+0x46c/0x7e0 fs/ext4/inode.c:5908
 ext4_unlink+0x6bb/0xeb0 fs/ext4/namei.c:3036
 vfs_unlink2+0x23b/0x470 fs/namei.c:4026
 do_unlinkat+0x467/0x650 fs/namei.c:4097
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4572b7
RSP: 002b:00007ffde099e788 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004572b7
RDX: 00007ffde099e7a0 RSI: 00007ffde099e7a0 RDI: 00007ffde099e830
RBP: 000000000000035c R08: 0000000000000000 R09: 0000000000000010
R10: 000000000000000a R11: 0000000000000246 R12: 00007ffde099f8c0
R13: 00000000019d9940 R14: 0000000000000000 R15: 0000000000000004

The buggy address belongs to the page:
page:ffffea0006b6c000 count:2 mapcount:0 mapping:ffff8801d9aa8950 index:0x42b
flags: 0x4000000000001074(referenced|dirty|lru|active|private)
raw: 4000000000001074 ffff8801d9aa8950 000000000000042b 00000002ffffffff
raw: ffffea0006b6cd60 ffffea0006b6ed60 ffff8801d52e4d20 ffff8801da81aa80
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff8801da81aa80

Memory state around the buggy address:
 ffff8801adb06f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801adb06f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801adb07000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8801adb07080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8801adb07100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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