loop0: detected capacity change from 0 to 512
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
loop0: detected capacity change from 512 to 511
==================================================================
BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x9c1/0x1e20 fs/ext4/xattr.c:1756
Read of size 18446744073709551600 at addr ffff88805227dcb8 by task syz.0.0/5328

CPU: 0 UID: 0 PID: 5328 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~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xca/0x240 mm/kasan/report.c:482
 kasan_report+0x118/0x150 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:200
 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94
 ext4_xattr_set_entry+0x9c1/0x1e20 fs/ext4/xattr.c:1756
 ext4_xattr_ibody_set+0x254/0x6a0 fs/ext4/xattr.c:2268
 ext4_destroy_inline_data_nolock+0x214/0x5b0 fs/ext4/inline.c:463
 ext4_convert_inline_data_nolock+0x1f1/0x970 fs/ext4/inline.c:1105
 ext4_convert_inline_data+0x4b3/0x5e0 fs/ext4/inline.c:1976
 ext4_fallocate+0x1e2/0x3d0 fs/ext4/extents.c:4793
 vfs_fallocate+0x669/0x7e0 fs/open.c:342
 ksys_fallocate fs/open.c:366 [inline]
 __do_sys_fallocate fs/open.c:371 [inline]
 __se_sys_fallocate fs/open.c:369 [inline]
 __x64_sys_fallocate+0xc0/0x110 fs/open.c:369
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f70e038f749
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f70e1244038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f70e05e5fa0 RCX: 00007f70e038f749
RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000000000004
RBP: 00007f70e0413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000007000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f70e05e6038 R14: 00007f70e05e5fa0 R15: 00007fff47dad888
 </TASK>

The buggy address belongs to the physical page:
page: refcount:3 mapcount:0 mapping:ffff888031d54d80 index:0x3 pfn:0x5227d
memcg:ffff88801baf0000
aops:def_blk_aops ino:700000 dentry name(?):""
flags: 0x4fff18000004a0c(referenced|uptodate|workingset|owner_2|private|node=1|zone=1|lastcpupid=0x7ff)
raw: 04fff18000004a0c 0000000000000000 dead000000000122 ffff888031d54d80
raw: 0000000000000003 ffff8880445882b8 00000003ffffffff ffff88801baf0000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x152c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 5299, tgid 5299 (udevd), ts 88166313943, free_ts 88139372727
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x234/0x290 mm/page_alloc.c:1845
 prep_new_page mm/page_alloc.c:1853 [inline]
 get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3879
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5178
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline]
 alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2507
 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2517
 filemap_alloc_folio_noprof+0xdf/0x470 mm/filemap.c:1020
 ractl_alloc_folio mm/readahead.c:189 [inline]
 page_cache_ra_unbounded+0x35d/0x9a0 mm/readahead.c:275
 do_page_cache_ra mm/readahead.c:332 [inline]
 force_page_cache_ra mm/readahead.c:361 [inline]
 page_cache_sync_ra+0x443/0xc60 mm/readahead.c:579
 filemap_get_pages+0x468/0x1de0 mm/filemap.c:2638
 filemap_read+0x3f6/0x11a0 mm/filemap.c:2748
 blkdev_read_iter+0x30a/0x440 block/fops.c:859
 new_sync_read fs/read_write.c:491 [inline]
 vfs_read+0x55a/0xa30 fs/read_write.c:572
 ksys_read+0x145/0x250 fs/read_write.c:715
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5328 tgid 5327 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 free_unref_folios+0xdb3/0x14f0 mm/page_alloc.c:2958
 folios_put_refs+0x584/0x670 mm/swap.c:1002
 folio_batch_release include/linux/pagevec.h:101 [inline]
 mapping_try_invalidate+0x324/0x410 mm/truncate.c:579
 loop_set_status+0x26e/0xd60 drivers/block/loop.c:1248
 lo_ioctl+0x9ef/0x1c50 drivers/block/loop.c:-1
 blkdev_ioctl+0x5af/0x6d0 block/ioctl.c:705
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88805227db80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88805227dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88805227dc80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                        ^
 ffff88805227dd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88805227dd80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================