EXT4-fs warning (device loop0): ext4_expand_extra_isize_ea:2860: Unable to expand inode 15. Delete some EAs or run e2fsck.
EXT4-fs (loop0): 1 truncate cleaned up
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
==================================================================
BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x7a4/0x1ed0 fs/ext4/xattr.c:1785
Read of size 18446744073709551572 at addr ffff88801f6da050 by task syz.0.17/5940

CPU: 0 UID: 0 PID: 5940 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
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+0x7a4/0x1ed0 fs/ext4/xattr.c:1785
 ext4_xattr_block_set+0x71e/0x2a80 fs/ext4/xattr.c:2032
 ext4_xattr_move_to_block fs/ext4/xattr.c:2671 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2746 [inline]
 ext4_expand_extra_isize_ea+0x1342/0x1e70 fs/ext4/xattr.c:2834
 __ext4_expand_extra_isize+0x30d/0x400 fs/ext4/inode.c:6486
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6529 [inline]
 __ext4_mark_inode_dirty+0x455/0x700 fs/ext4/inode.c:6607
 __ext4_unlink+0x6a3/0xb40 fs/ext4/namei.c:3289
 ext4_unlink+0x206/0x5c0 fs/ext4/namei.c:3319
 vfs_unlink+0x27b/0x6e0 fs/namei.c:5509
 filename_unlinkat+0x3d3/0x610 fs/namei.c:5579
 __do_sys_unlink fs/namei.c:5614 [inline]
 __se_sys_unlink+0x2e/0x140 fs/namei.c:5611
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb92808de99
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:00007ffeebe6d1f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007fb928315fa0 RCX: 00007fb92808de99
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180
RBP: 00007fb928123eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb928315fac R14: 00007fb928315fa0 R15: 00007fb928315fa0
 </TASK>

Allocated by task 5940:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5339 [inline]
 __kmalloc_node_track_caller_noprof+0x566/0x7b0 mm/slub.c:5468
 kmemdup_noprof+0x2b/0x70 mm/util.c:138
 kmemdup_noprof include/linux/fortify-string.h:715 [inline]
 ext4_xattr_block_set+0x633/0x2a80 fs/ext4/xattr.c:1980
 ext4_xattr_move_to_block fs/ext4/xattr.c:2671 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2746 [inline]
 ext4_expand_extra_isize_ea+0x1342/0x1e70 fs/ext4/xattr.c:2834
 __ext4_expand_extra_isize+0x30d/0x400 fs/ext4/inode.c:6486
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6529 [inline]
 __ext4_mark_inode_dirty+0x455/0x700 fs/ext4/inode.c:6607
 __ext4_unlink+0x6a3/0xb40 fs/ext4/namei.c:3289
 ext4_unlink+0x206/0x5c0 fs/ext4/namei.c:3319
 vfs_unlink+0x27b/0x6e0 fs/namei.c:5509
 filename_unlinkat+0x3d3/0x610 fs/namei.c:5579
 __do_sys_unlink fs/namei.c:5614 [inline]
 __se_sys_unlink+0x2e/0x140 fs/namei.c:5611
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88801f6da000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 80 bytes inside of
 1024-byte region [ffff88801f6da000, ffff88801f6da400)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1f6d8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x80000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000040 ffff88813feaedc0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 0080000000000040 ffff88813feaedc0 dead000000000100 dead000000000122
head: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 0080000000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 2866025379
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
 prep_new_page mm/page_alloc.c:1879 [inline]
 get_page_from_freelist+0x264c/0x26c0 mm/page_alloc.c:3955
 __alloc_frozen_pages_noprof+0x222/0x5b0 mm/page_alloc.c:5394
 alloc_slab_page mm/slub.c:3295 [inline]
 allocate_slab+0x7c/0x5e0 mm/slub.c:3410
 new_slab mm/slub.c:3456 [inline]
 refill_objects+0x2d8/0x350 mm/slub.c:7321
 refill_sheaf mm/slub.c:2833 [inline]
 __pcs_replace_empty_main+0x330/0x690 mm/slub.c:4699
 alloc_from_pcs mm/slub.c:4775 [inline]
 slab_alloc_node mm/slub.c:4909 [inline]
 __do_kmalloc_node mm/slub.c:5338 [inline]
 __kmalloc_noprof+0x543/0x790 mm/slub.c:5364
 _kmalloc_noprof include/linux/slab.h:973 [inline]
 _kzalloc_noprof include/linux/slab.h:1290 [inline]
 __alloc_workqueue+0x10b/0x2060 kernel/workqueue.c:5884
 alloc_workqueue_va kernel/workqueue.c:6003 [inline]
 alloc_workqueue_noprof+0xe3/0x210 kernel/workqueue.c:6019
 pm_start_workqueues+0x38/0x60 kernel/power/main.c:1133
 pm_init+0x9/0xb0 kernel/power/main.c:1145
 do_one_initcall+0x250/0x870 init/main.c:1357
 do_initcall_level+0x10a/0x1a0 init/main.c:1419
 do_initcalls+0x59/0xa0 init/main.c:1435
 kernel_init_freeable+0x29d/0x3e0 init/main.c:1670
 kernel_init+0x22/0x1d0 init/main.c:1560
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88801f6d9f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88801f6d9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88801f6da000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                 ^
 ffff88801f6da080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88801f6da100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================