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BUG: KASAN: use-after-free in ext4_xattr_delete_inode+0xc67/0xc80 fs/ext4/xattr.c:2894
Read of size 4 at addr ffff88811e83f000 by task syz-executor247/287

CPU: 1 PID: 287 Comm: syz-executor247 Not tainted 5.10.216-syzkaller-00510-ga4a2b7a82ee4 #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: 0033:0x7f928fd58dc7
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:00007fff87cf9fb8 EFLAGS: 00000207 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f928fd58dc7
RDX: 0000000000008890 RSI: 0000000000000000 RDI: 00007fff87cfb160
RBP: 0000000000000065 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000207 R12: 00007fff87cfb160
R13: 00005555563b3740 R14: 431bde82d7b634db R15: 00007fff87cfd2e0

Allocated by task 263:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 __kasan_slab_alloc+0xb1/0xe0 mm/kasan/common.c:463
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x61/0x2f0 mm/slab.h:583
 slab_alloc_node mm/slub.c:2947 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x168/0x2e0 mm/slub.c:2960
 vm_area_dup+0x26/0x270 kernel/fork.c:366
 dup_mmap kernel/fork.c:550 [inline]
 dup_mm kernel/fork.c:1435 [inline]
 copy_mm+0x8ac/0x13a0 kernel/fork.c:1491
 copy_process+0x1175/0x3340 kernel/fork.c:2183
 kernel_clone+0x21e/0x9e0 kernel/fork.c:2574
 __do_sys_clone kernel/fork.c:2700 [inline]
 __se_sys_clone kernel/fork.c:2684 [inline]
 __x64_sys_clone+0x23f/0x290 kernel/fork.c:2684
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6

Freed by task 274:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x121/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1595 [inline]
 slab_free_freelist_hook+0xc0/0x190 mm/slub.c:1621
 slab_free mm/slub.c:3203 [inline]
 kmem_cache_free+0xa9/0x1e0 mm/slub.c:3219
 vm_area_free+0x52/0xf0 kernel/fork.c:386
 __free_vma mm/mmap.c:179 [inline]
 put_vma mm/mmap.c:186 [inline]
 remove_vma mm/mmap.c:205 [inline]
 exit_mmap+0x494/0x5c0 mm/mmap.c:3363
 __mmput+0x95/0x2d0 kernel/fork.c:1153
 mmput+0x59/0x170 kernel/fork.c:1176
 exec_mmap fs/exec.c:1042 [inline]
 begin_new_exec+0xc70/0x2380 fs/exec.c:1289
 load_elf_binary+0x945/0x2750 fs/binfmt_elf.c:998
 search_binary_handler fs/exec.c:1722 [inline]
 exec_binprm fs/exec.c:1763 [inline]
 bprm_execve+0x81b/0x1600 fs/exec.c:1839
 do_execveat_common+0x959/0xac0 fs/exec.c:1950
 do_execve fs/exec.c:2020 [inline]
 __do_sys_execve fs/exec.c:2096 [inline]
 __se_sys_execve fs/exec.c:2091 [inline]
 __x64_sys_execve+0x92/0xb0 fs/exec.c:2091
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6

The buggy address belongs to the object at ffff88811e83f000
 which belongs to the cache vm_area_struct of size 232
The buggy address is located 0 bytes inside of
 232-byte region [ffff88811e83f000, ffff88811e83f0e8)
The buggy address belongs to the page:
page:ffffea00047a0fc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11e83f
flags: 0x4000000000000200(slab)
raw: 4000000000000200 dead000000000100 dead000000000122 ffff888100191080
raw: 0000000000000000 00000000000d000d 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 263, ts 17128239748, 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:5348
 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+0x1b9/0x2e0 mm/slub.c:2960
 vm_area_dup+0x26/0x270 kernel/fork.c:366
 dup_mmap kernel/fork.c:550 [inline]
 dup_mm kernel/fork.c:1435 [inline]
 copy_mm+0x8ac/0x13a0 kernel/fork.c:1491
 copy_process+0x1175/0x3340 kernel/fork.c:2183
 kernel_clone+0x21e/0x9e0 kernel/fork.c:2574
 __do_sys_clone kernel/fork.c:2700 [inline]
 __se_sys_clone kernel/fork.c:2684 [inline]
 __x64_sys_clone+0x23f/0x290 kernel/fork.c:2684
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88811e83ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88811e83ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88811e83f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88811e83f080: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
 ffff88811e83f100: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb
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