EXT4-fs error (device sda1): ext4_expand_extra_isize_ea:2726: inode #17610: comm syz-executor2: corrupted in-inode xattr
EXT4-fs warning (device sda1): ext4_expand_extra_isize_ea:2788: Unable to expand inode 17610. Delete some EAs or run e2fsck.
EXT4-fs error (device sda1): ext4_expand_extra_isize_ea:2726: inode #17611: comm syz-executor2: corrupted in-inode xattr
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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 65505 at addr ffff8801ac7b74a0 by task syz-executor2/30023

CPU: 0 PID: 30023 Comm: syz-executor2 Not tainted 4.14.78+ #28
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
 add_dirent_to_buf+0x38a/0x640 fs/ext4/namei.c:1889
 ext4_add_entry+0x519/0x990 fs/ext4/namei.c:2082
 ext4_add_nondir+0x22/0x80 fs/ext4/namei.c:2411
 ext4_symlink+0x51e/0xaf0 fs/ext4/namei.c:3161
 vfs_symlink2+0x321/0x550 fs/namei.c:4161
 SYSC_symlinkat fs/namei.c:4194 [inline]
 SyS_symlinkat+0x110/0x1e0 fs/namei.c:4174
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457297
RSP: 002b:00007ffd7bad7938 EFLAGS: 00000202 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000457297
RDX: 00007ffd7bad79b3 RSI: 00000000004bcf9a RDI: 00007ffd7bad79a0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000013
R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000009 R15: 0000000000000002

The buggy address belongs to the page:
page:ffffea0006b1edc0 count:2 mapcount:0 mapping:ffff8801da416b10 index:0x42b
flags: 0x4000000000001074(referenced|dirty|lru|active|private)
raw: 4000000000001074 ffff8801da416b10 000000000000042b 00000002ffffffff
raw: ffffea0006b1abe0 ffffea0006b1de60 ffff8801c243d738 ffff8801da81aa80
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff8801da81aa80

Memory state around the buggy address:
 ffff8801ac7b7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801ac7b7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801ac7b8000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8801ac7b8080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8801ac7b8100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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