EXT4-fs (loop1): mounted filesystem without journal. Quota mode: none.
EXT4-fs error (device loop1): __ext4_new_inode:1081: comm syz.1.1573: reserved inode found cleared - inode=3
==================================================================
BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0xaf2/0x21d0 fs/ext4/xattr.c:1708
Read of size 18446744073709551600 at addr ffff8881482ff2b8 by task syz.1.1573/5796

CPU: 1 PID: 5796 Comm: syz.1.1573 Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x71/0x200 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:420
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 memmove+0x2d/0x70 mm/kasan/shadow.c:54
 ext4_xattr_set_entry+0xaf2/0x21d0 fs/ext4/xattr.c:1708
 ext4_xattr_ibody_set+0x24e/0x6c0 fs/ext4/xattr.c:2215
 ext4_destroy_inline_data_nolock+0x234/0x5d0 fs/ext4/inline.c:468
 ext4_convert_inline_data_nolock+0x3c0/0x9e0 fs/ext4/inline.c:1250
 ext4_convert_inline_data+0x4b9/0x5f0 fs/ext4/inline.c:2119
 ext4_fallocate+0xfd/0x1dc0 fs/ext4/extents.c:4761
 vfs_fallocate+0x4c5/0x5a0 fs/open.c:324
 ksys_fallocate fs/open.c:347 [inline]
 __do_sys_fallocate fs/open.c:355 [inline]
 __se_sys_fallocate fs/open.c:353 [inline]
 __x64_sys_fallocate+0xc0/0x110 fs/open.c:353
 x64_sys_call+0x7fa/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:286
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff4a7b9ce59
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:00007ff4a8a65028 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007ff4a7e15fa0 RCX: 00007ff4a7b9ce59
RDX: 0000000000004000 RSI: 0000000000000008 RDI: 000000000000000a
RBP: 00007ff4a7c32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff4a7e16038 R14: 00007ff4a7e15fa0 R15: 00007ffd86b7d1e8
 </TASK>

The buggy address belongs to the physical page:
page:ffffea000520bfc0 refcount:3 mapcount:1 mapping:ffff88810048b2d0 index:0x2 pfn:0x1482ff
memcg:ffff88810023d7c0
aops:def_blk_aops ino:700001
flags: 0x560000000002205e(referenced|uptodate|dirty|lru|workingset|private|mappedtodisk|zone=1)
raw: 560000000002205e ffffea00045bc4c8 ffffea000424c248 ffff88810048b2d0
raw: 0000000000000002 ffff8881327a8dc8 0000000300000000 ffff88810023d7c0
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_NOFAIL|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 5796, tgid 5795 (syz.1.1573), ts 217148799214, free_ts 217138438598
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2672
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2679
 get_page_from_freelist+0x2d12/0x2d80 mm/page_alloc.c:4585
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5929
 __folio_alloc+0x12/0x40 mm/page_alloc.c:5962
 __folio_alloc_node include/linux/gfp.h:245 [inline]
 folio_alloc include/linux/gfp.h:274 [inline]
 filemap_alloc_folio include/linux/pagemap.h:515 [inline]
 __filemap_get_folio+0x6ee/0xa60 mm/filemap.c:2020
 pagecache_get_page+0x2b/0x110 mm/folio-compat.c:110
 find_or_create_page include/linux/pagemap.h:656 [inline]
 grow_dev_page fs/buffer.c:989 [inline]
 grow_buffers fs/buffer.c:1054 [inline]
 __getblk_slow fs/buffer.c:1081 [inline]
 __getblk_gfp+0x217/0x7d0 fs/buffer.c:1376
 sb_getblk include/linux/buffer_head.h:356 [inline]
 __ext4_get_inode_loc+0x481/0xdf0 fs/ext4/inode.c:4527
 __ext4_get_inode_loc_noinmem fs/ext4/inode.c:4640 [inline]
 __ext4_iget+0x448/0x3e40 fs/ext4/inode.c:4887
 ext4_lookup+0x28e/0x710 fs/ext4/namei.c:1858
 lookup_open fs/namei.c:3467 [inline]
 open_last_lookups fs/namei.c:3557 [inline]
 path_openat+0x1006/0x2f80 fs/namei.c:3787
 do_filp_open+0x1f1/0x430 fs/namei.c:3817
 do_sys_openat2+0x15e/0x810 fs/open.c:1343
 do_sys_open fs/open.c:1359 [inline]
 __do_sys_creat fs/open.c:1437 [inline]
 __se_sys_creat fs/open.c:1431 [inline]
 __x64_sys_creat+0x8e/0xb0 fs/open.c:1431
 x64_sys_call+0x116/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:86
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1580 [inline]
 free_pcp_prepare mm/page_alloc.c:1654 [inline]
 free_unref_page_prepare+0x7f8/0x800 mm/page_alloc.c:3620
 free_unref_page_list+0x117/0x8c0 mm/page_alloc.c:3771
 release_pages+0xc93/0xcf0 mm/swap.c:1053
 free_pages_and_swap_cache+0x86/0xa0 mm/swap_state.c:316
 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:254 [inline]
 tlb_flush_mmu mm/mmu_gather.c:261 [inline]
 tlb_finish_mmu+0x1aa/0x370 mm/mmu_gather.c:361
 unmap_region+0x2b7/0x320 mm/mmap.c:2419
 do_mas_align_munmap+0xbed/0x1320 mm/mmap.c:2693
 do_mas_munmap+0x241/0x2b0 mm/mmap.c:2751
 __vm_munmap+0x1bd/0x330 mm/mmap.c:3050
 __do_sys_munmap mm/mmap.c:3076 [inline]
 __se_sys_munmap mm/mmap.c:3072 [inline]
 __x64_sys_munmap+0x6b/0x80 mm/mmap.c:3072
 x64_sys_call+0x8a/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:12
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Memory state around the buggy address:
 ffff8881482ff180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881482ff200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881482ff280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                        ^
 ffff8881482ff300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881482ff380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
EXT4-fs warning (device loop1): ext4_xattr_set_entry:1721: inode #15: comm syz.1.1573: unable to update i_inline_off