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BUG: KASAN: slab-out-of-bounds in ext4_xattr_delete_inode+0xcd0/0xce0 fs/ext4/xattr.c:2904
Read of size 4 at addr ffff88812a9ae000 by task syz-executor.1/311

CPU: 1 PID: 311 Comm: syz-executor.1 Not tainted 5.15.149-syzkaller-00165-g85445b5a2107 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description+0x87/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:444
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 ext4_xattr_delete_inode+0xcd0/0xce0 fs/ext4/xattr.c:2904
 ext4_evict_inode+0xea1/0x14e0 fs/ext4/inode.c:300
 evict+0x2a3/0x630 fs/inode.c:587
 iput_final fs/inode.c:1705 [inline]
 iput+0x63b/0x7e0 fs/inode.c:1731
 d_delete_notify include/linux/fsnotify.h:270 [inline]
 vfs_rmdir+0x359/0x470 fs/namei.c:4162
 do_rmdir+0x3ab/0x630 fs/namei.c:4210
 __do_sys_unlinkat fs/namei.c:4390 [inline]
 __se_sys_unlinkat fs/namei.c:4384 [inline]
 __x64_sys_unlinkat+0xdf/0xf0 fs/namei.c:4384
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f5fe6b0a687
Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 07 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffde9fec698 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007f5fe6b0a687
RDX: 0000000000000200 RSI: 00007ffde9fed840 RDI: 00000000ffffff9c
RBP: 00007f5fe6b67636 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000207 R12: 00007ffde9fed840
R13: 00007f5fe6b67636 R14: 0000000000006e25 R15: 0000000000000007
 </TASK>

Allocated by task 0:
(stack is not available)

The buggy address belongs to the object at ffff88812a9ae000
 which belongs to the cache aio_kiocb of size 192
The buggy address is located 0 bytes inside of
 192-byte region [ffff88812a9ae000, ffff88812a9ae0c0)
The buggy address belongs to the page:
page:ffffea0004aa6b80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12a9ae
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000122 ffff888107fbdc80
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 390, ts 27327782843, free_ts 27327711045
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2604
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2610
 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4484
 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5776
 allocate_slab mm/slub.c:1932 [inline]
 new_slab+0x9a/0x4e0 mm/slub.c:1995
 ___slab_alloc+0x39e/0x830 mm/slub.c:3028
 __slab_alloc+0x4a/0x90 mm/slub.c:3115
 slab_alloc_node mm/slub.c:3206 [inline]
 slab_alloc mm/slub.c:3248 [inline]
 kmem_cache_alloc+0x134/0x200 mm/slub.c:3253
 aio_get_req fs/aio.c:1034 [inline]
 io_submit_one+0x157/0x1dd0 fs/aio.c:1998
 __do_sys_io_submit fs/aio.c:2061 [inline]
 __se_sys_io_submit+0x168/0x3c0 fs/aio.c:2031
 __x64_sys_io_submit+0x7b/0x90 fs/aio.c:2031
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1471 [inline]
 free_pcp_prepare mm/page_alloc.c:1543 [inline]
 free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3533
 free_unref_page+0xe8/0x750 mm/page_alloc.c:3615
 free_the_page mm/page_alloc.c:804 [inline]
 __free_pages+0x61/0xf0 mm/page_alloc.c:5852
 __vunmap+0x7bc/0x8f0 mm/vmalloc.c:2652
 free_work+0x5b/0x80 mm/vmalloc.c:96
 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Memory state around the buggy address:
 ffff88812a9adf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88812a9adf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88812a9ae000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff88812a9ae080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88812a9ae100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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