loop0: detected capacity change from 0 to 512
EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!
EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode
EXT4-fs (loop0): 1 truncate cleaned up
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
loop0: detected capacity change from 512 to 64
==================================================================
BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x9c1/0x1e20 fs/ext4/xattr.c:1761
Read of size 18446744073709551600 at addr ffff888050ac15d0 by task syz.0.0/5329

CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xba/0x230 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200
 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94
 ext4_xattr_set_entry+0x9c1/0x1e20 fs/ext4/xattr.c:1761
 ext4_xattr_ibody_set+0x254/0x6a0 fs/ext4/xattr.c:2273
 ext4_destroy_inline_data_nolock+0x23a/0x5e0 fs/ext4/inline.c:472
 ext4_convert_inline_data_to_extent+0x547/0xde0 fs/ext4/inline.c:631
 ext4_write_begin+0x357/0x18c0 fs/ext4/inode.c:1310
 generic_perform_write+0x2e2/0x8f0 mm/filemap.c:4319
 ext4_buffered_write_iter+0xce/0x3a0 fs/ext4/file.c:300
 ext4_file_write_iter+0x298/0x1bf0 fs/ext4/file.c:-1
 aio_write+0x5cd/0x870 fs/aio.c:1633
 __io_submit_one fs/aio.c:-1 [inline]
 io_submit_one+0x7bb/0x14c0 fs/aio.c:2052
 __do_sys_io_submit fs/aio.c:2111 [inline]
 __se_sys_io_submit+0x195/0x340 fs/aio.c:2081
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcc3ad9c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcc3bcfafe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007fcc3b015fa0 RCX: 00007fcc3ad9c819
RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007fcc3bcb1000
RBP: 00007fcc3ae32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcc3b016038 R14: 00007fcc3b015fa0 R15: 00007fff8bdb3b38
 </TASK>

The buggy address belongs to the physical page:
page: refcount:3 mapcount:0 mapping:ffff88801cc2e6c8 index:0x2 pfn:0x50ac1
memcg:ffff88801c6c0d40
aops:def_blk_aops ino:700000 dentry name(?):""
flags: 0x4fff18000004214(referenced|dirty|workingset|private|node=1|zone=1|lastcpupid=0x7ff)
raw: 04fff18000004214 0000000000000000 dead000000000122 ffff88801cc2e6c8
raw: 0000000000000002 ffff888047e59ae0 00000003ffffffff ffff88801c6c0d40
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Movable, gfp_mask 0x148c48(GFP_NOFS|__GFP_MOVABLE|__GFP_NOFAIL|__GFP_COMP|__GFP_HARDWALL), pid 5329, tgid 5328 (syz.0.0), ts 104821655381, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889
 prep_new_page mm/page_alloc.c:1897 [inline]
 get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2490
 alloc_frozen_pages_noprof mm/mempolicy.c:2561 [inline]
 alloc_pages_noprof+0xa8/0x1a0 mm/mempolicy.c:2581
 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2591
 filemap_alloc_folio_noprof+0x111/0x470 mm/filemap.c:1013
 __filemap_get_folio_mpol+0x3fc/0xb00 mm/filemap.c:2011
 __filemap_get_folio include/linux/pagemap.h:763 [inline]
 grow_dev_folio fs/buffer.c:1047 [inline]
 grow_buffers fs/buffer.c:1113 [inline]
 __getblk_slow fs/buffer.c:1131 [inline]
 bdev_getblk+0x1f6/0x6e0 fs/buffer.c:1458
 __getblk include/linux/buffer_head.h:380 [inline]
 sb_getblk include/linux/buffer_head.h:386 [inline]
 __ext4_get_inode_loc+0x528/0xfa0 fs/ext4/inode.c:4802
 ext4_get_inode_loc fs/ext4/inode.c:4930 [inline]
 ext4_reserve_inode_write+0x18b/0x360 fs/ext4/inode.c:6280
 __ext4_mark_inode_dirty+0x14b/0x730 fs/ext4/inode.c:6458
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6495
 __mark_inode_dirty+0x3a4/0x1470 fs/fs-writeback.c:2621
 generic_update_time fs/inode.c:2198 [inline]
 file_update_time_flags+0x3ee/0x4a0 fs/inode.c:2428
 ext4_write_checks+0x240/0x2c0 fs/ext4/file.c:280
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888050ac1480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888050ac1500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888050ac1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                 ^
 ffff888050ac1600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888050ac1680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================