EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs error (device loop0): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters
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BUG: KASAN: out-of-bounds in memmove include/linux/string.h:392 [inline]
BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x2562/0x3750 fs/ext4/xattr.c:1733
Read of size 18446744073709551600 at addr ffff8880abc820d4 by task syz-executor288/8103

CPU: 1 PID: 8103 Comm: syz-executor288 Not tainted 4.19.186-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
 kasan_report+0x8f/0xa0 mm/kasan/report.c:412
 memmove+0x20/0x50 mm/kasan/kasan.c:293
 memmove include/linux/string.h:392 [inline]
 ext4_xattr_set_entry+0x2562/0x3750 fs/ext4/xattr.c:1733
 ext4_xattr_ibody_inline_set+0x81/0x2a0 fs/ext4/xattr.c:2222
 ext4_destroy_inline_data_nolock+0x22d/0x4f0 fs/ext4/inline.c:434
 ext4_convert_inline_data_nolock+0x145/0xd10 fs/ext4/inline.c:1207
 ext4_convert_inline_data+0x347/0x3a0 fs/ext4/inline.c:2027
 ext4_fallocate+0x137/0x2150 fs/ext4/extents.c:4956
 vfs_fallocate+0x487/0x9a0 fs/open.c:308
 ksys_fallocate fs/open.c:331 [inline]
 __do_sys_fallocate fs/open.c:339 [inline]
 __se_sys_fallocate fs/open.c:337 [inline]
 __x64_sys_fallocate+0xcf/0x140 fs/open.c:337
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x44a649
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6a6cc272f8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00000000004cc410 RCX: 000000000044a649
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 000000000049c0c4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000010000101 R11: 0000000000000246 R12: 000000000049b0c0
R13: 0030656c69662f2e R14: e5d26e84aa4cf3c6 R15: 00000000004cc418

The buggy address belongs to the page:
page:ffffea0002af2080 count:2 mapcount:0 mapping:ffff8880ae106b60 index:0x8
flags: 0xfff0000001107c(referenced|uptodate|dirty|lru|active|private|mappedtodisk)
raw: 00fff0000001107c ffffea0002641888 ffffea0002624d08 ffff8880ae106b60
raw: 0000000000000008 ffff88808df34000 00000002ffffffff ffff8880b59f88c0
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff8880b59f88c0

Memory state around the buggy address:
 ffff8880abc81f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8880abc82000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880abc82080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                 ^
 ffff8880abc82100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880abc82180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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