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BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x9c1/0x1e20 fs/ext4/xattr.c:1763
Read of size 18446744073709551600 at addr ffff88800e4f25b8 by task syz.0.0/5330

CPU: 0 UID: 0 PID: 5330 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+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 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:1763
 ext4_xattr_ibody_set+0x254/0x6a0 fs/ext4/xattr.c:2275
 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+0x357/0x1890 fs/ext4/inode.c:1315
 generic_perform_write+0x2e2/0x8f0 mm/filemap.c:4325
 ext4_buffered_write_iter+0xce/0x3a0 fs/ext4/file.c:316
 ext4_file_write_iter+0x298/0x1bf0 fs/ext4/file.c:-1
 aio_write+0x5cd/0x870 fs/aio.c:1688
 __io_submit_one fs/aio.c:-1 [inline]
 io_submit_one+0x7bb/0x14c0 fs/aio.c:2107
 __do_sys_io_submit fs/aio.c:2166 [inline]
 __se_sys_io_submit+0x195/0x340 fs/aio.c:2136
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0891d9ce59
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:00007f0892cfdfe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007f0892016090 RCX: 00007f0891d9ce59
RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007f0892cd5000
RBP: 00007f0891e32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0892016128 R14: 00007f0892016090 R15: 00007fffd427fa88
 </TASK>

The buggy address belongs to the physical page:
page: refcount:3 mapcount:0 mapping:ffff88801cc25940 index:0x2 pfn:0xe4f2
memcg:ffff88803ad12d00
aops:def_blk_aops ino:700000 dentry name(?):""
flags: 0xfff18000004214(referenced|dirty|workingset|private|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff18000004214 0000000000000000 dead000000000122 ffff88801cc25940
raw: 0000000000000002 ffff888032564570 00000003ffffffff ffff88803ad12d00
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 5330, tgid 5328 (syz.0.0), ts 91482175971, free_ts 91469453414
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x2593/0x2610 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2490
 alloc_frozen_pages_noprof mm/mempolicy.c:2561 [inline]
 alloc_pages_noprof+0xac/0x2a0 mm/mempolicy.c:2581
 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2591
 filemap_alloc_folio_noprof+0x111/0x470 mm/filemap.c:1014
 __filemap_get_folio_mpol+0x3fc/0xb00 mm/filemap.c:2012
 __filemap_get_folio include/linux/pagemap.h:763 [inline]
 grow_dev_folio fs/buffer.c:954 [inline]
 grow_buffers fs/buffer.c:1020 [inline]
 __getblk_slow fs/buffer.c:1038 [inline]
 bdev_getblk+0x1f6/0x6e0 fs/buffer.c:1358
 __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:4890
 ext4_get_inode_loc fs/ext4/inode.c:5018 [inline]
 ext4_reserve_inode_write+0x18b/0x360 fs/ext4/inode.c:6372
 __ext4_mark_inode_dirty+0x14b/0x710 fs/ext4/inode.c:6550
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6587
 __mark_inode_dirty+0x3a4/0x13b0 fs/fs-writeback.c:2623
 generic_update_time fs/inode.c:2198 [inline]
 file_update_time_flags+0x3ee/0x4a0 fs/inode.c:2428
 ext4_write_checks+0x2a9/0x480 fs/ext4/file.c:281
page last free pid 5287 tgid 5287 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 free_unref_folios+0xd9f/0x14c0 mm/page_alloc.c:2999
 folios_put_refs+0x9ff/0xb40 mm/swap.c:1008
 folio_batch_release include/linux/folio_batch.h:101 [inline]
 shmem_undo_range+0x52c/0x1660 mm/shmem.c:1149
 shmem_truncate_range mm/shmem.c:1277 [inline]
 shmem_evict_inode+0x289/0xae0 mm/shmem.c:1407
 evict+0x61e/0xb10 fs/inode.c:841
 __dentry_kill+0x1a2/0x690 fs/dcache.c:718
 finish_dput+0xc9/0x480 fs/dcache.c:927
 end_renaming fs/namei.c:4124 [inline]
 filename_renameat2+0x61e/0x9c0 fs/namei.c:6174
 __do_sys_rename fs/namei.c:6216 [inline]
 __se_sys_rename+0x55/0x2c0 fs/namei.c:6212
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88800e4f2480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88800e4f2500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88800e4f2580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                        ^
 ffff88800e4f2600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88800e4f2680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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