EXT4-fs error (device sda1): ext4_xattr_set_entry:1608: inode #16546: comm syz-executor5: corrupted xattr entries
EXT4-fs error (device sda1): ext4_xattr_set_entry:1608: inode #16542: comm syz-executor4: corrupted xattr entries
EXT4-fs error (device sda1): ext4_xattr_set_entry:1608: inode #16542: comm syz-executor4: 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:5781
Write of size 2016 at addr ffff8881ada39fa0 by task syz-executor5/6974

CPU: 0 PID: 6974 Comm: syz-executor5 Not tainted 4.14.90+ #29
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:5781
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5833 [inline]
 ext4_mark_inode_dirty+0x46c/0x7e0 fs/ext4/inode.c:5909
 ext4_evict_inode+0x69a/0x1520 fs/ext4/inode.c:282
 evict+0x2cb/0x5f0 fs/inode.c:554
 iput_final fs/inode.c:1516 [inline]
 iput+0x373/0x8e0 fs/inode.c:1543
 dentry_unlink_inode+0x25c/0x310 fs/dcache.c:387
 __dentry_kill+0x31b/0x590 fs/dcache.c:591
 dentry_kill fs/dcache.c:632 [inline]
 dput.part.6+0x4b5/0x710 fs/dcache.c:847
 dput+0x1b/0x30 fs/dcache.c:811
 path_put+0x2d/0x60 fs/namei.c:516
 free_fs_struct+0x1e/0x60 fs/fs_struct.c:91
 exit_fs+0xd6/0x110 fs/fs_struct.c:109
 do_exit+0x8d8/0x28c0 kernel/exit.c:861
 do_group_exit+0x100/0x2e0 kernel/exit.c:968
 get_signal+0x4e5/0x1470 kernel/signal.c:2348
 do_signal+0x8f/0x1660 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0x116/0x150 arch/x86/entry/common.c:159
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:267 [inline]
 do_syscall_64+0x35d/0x4b0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457669
RSP: 002b:00007f7d77b3ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 0000000000010000 RBX: 0000000000000003 RCX: 0000000000457669
RDX: 00000000fffffef3 RSI: 00000000200001c0 RDI: 0000000000000007
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7d77b3f6d4
R13: 00000000004c2dcc R14: 00000000004da398 R15: 00000000ffffffff

The buggy address belongs to the page:
page:ffffea0006b68e40 count:2 mapcount:0 mapping:ffff8881d9aa8950 index:0x42b
flags: 0x4000000000001074(referenced|dirty|lru|active|private)
raw: 4000000000001074 ffff8881d9aa8950 000000000000042b 00000002ffffffff
raw: ffffea00067f0720 ffffea0006b6a360 ffff8881c3c3f738 ffff8881da81aa80
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff8881da81aa80

Memory state around the buggy address:
 ffff8881ada39f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881ada39f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881ada3a000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8881ada3a080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881ada3a100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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