==================================================================
BUG: KASAN: use-after-free in ext4_xattr_delete_inode+0xc67/0xc80 fs/ext4/xattr.c:2894
Read of size 4 at addr ffff8881085a9000 by task syz-executor167/288

CPU: 1 PID: 288 Comm: syz-executor167 Not tainted 5.10.214-syzkaller-00496-ga8e7f812fbc1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x81/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:452
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 ext4_xattr_delete_inode+0xc67/0xc80 fs/ext4/xattr.c:2894
 ext4_evict_inode+0x1095/0x1730 fs/ext4/inode.c:300
 evict+0x2a3/0x6c0 fs/inode.c:577
 iput_final fs/inode.c:1697 [inline]
 iput+0x632/0x7e0 fs/inode.c:1723
 d_delete_notify include/linux/fsnotify.h:261 [inline]
 vfs_rmdir+0x271/0x3f0 fs/namei.c:3865
 do_rmdir+0x2cf/0x5c0 fs/namei.c:3912
 __do_sys_rmdir fs/namei.c:3930 [inline]
 __se_sys_rmdir fs/namei.c:3928 [inline]
 __x64_sys_rmdir+0x49/0x50 fs/namei.c:3928
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7fba1ce18dc7
Code: 73 01 c3 48 c7 c1 b8 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 54 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdec9f2128 EFLAGS: 00000207 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fba1ce18dc7
RDX: 0000000000008890 RSI: 0000000000000000 RDI: 00007ffdec9f32d0
RBP: 0000000000000065 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000207 R12: 00007ffdec9f32d0
R13: 0000555556cc1740 R14: 431bde82d7b634db R15: 00007ffdec9f5450

Allocated by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8881085a9000
 which belongs to the cache kmalloc-128 of size 128
The buggy address is located 0 bytes inside of
 128-byte region [ffff8881085a9000, ffff8881085a9080)
The buggy address belongs to the page:
page:ffffea0004216a40 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8881085a9100 pfn:0x1085a9
flags: 0x4000000000000200(slab)
raw: 4000000000000200 ffffea0004216b08 ffffea0004216908 ffff888100043500
raw: ffff8881085a9100 0000000000100005 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, ts 1126045837, free_ts 0
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x166/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5346
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x80/0x400 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x302/0x4b0 mm/slub.c:2791
 __slab_alloc+0x63/0xa0 mm/slub.c:2831
 slab_alloc_node mm/slub.c:2913 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc_trace+0x1bd/0x2e0 mm/slub.c:2972
 kmalloc include/linux/slab.h:552 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 call_usermodehelper_setup+0x72/0x1e0 kernel/umh.c:363
 kobject_uevent_env+0x637/0x700 lib/kobject_uevent.c:614
 kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:642
 kernel_add_sysfs_param+0x108/0x12d kernel/params.c:798
 param_sysfs_builtin+0x16a/0x1e2 kernel/params.c:833
 param_sysfs_init+0x6a/0x6f kernel/params.c:954
 do_one_initcall+0x189/0x620 init/main.c:1195
 do_initcall_level+0x186/0x304 init/main.c:1268
 do_initcalls+0x4e/0x8e init/main.c:1284
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8881085a8f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881085a8f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881085a9000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff8881085a9080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881085a9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================