==================================================================
BUG: KASAN: use-after-free in ext4_xattr_delete_inode+0xd41/0xd50 fs/ext4/xattr.c:2951
Read of size 4 at addr ffff88811f328000 by task syz-executor/477

CPU: 1 PID: 477 Comm: syz-executor Not tainted 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #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+0x188/0x200 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x163/0x550 mm/kasan/report.c:488
 kasan_report+0x14f/0x190 mm/kasan/report.c:601
 __asan_report_load4_noabort+0x18/0x20 mm/kasan/report_generic.c:380
 ext4_xattr_delete_inode+0xd41/0xd50 fs/ext4/xattr.c:2951
 ext4_evict_inode+0xcbb/0x12d0 fs/ext4/inode.c:268
 evict+0x2a7/0x640 fs/inode.c:667
 iput_final fs/inode.c:1741 [inline]
 iput+0x650/0x880 fs/inode.c:1767
 d_delete_notify include/linux/fsnotify.h:326 [inline]
 vfs_rmdir+0x415/0x540 fs/namei.c:4227
 do_rmdir+0x32f/0x4e0 fs/namei.c:4273
 __do_sys_unlinkat fs/namei.c:4449 [inline]
 __se_sys_unlinkat fs/namei.c:4443 [inline]
 __x64_sys_unlinkat+0xe3/0x100 fs/namei.c:4443
 x64_sys_call+0x2566/0x2d00 arch/x86/include/generated/asm/syscalls_64.h:264
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x54/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f4649a7c6c7
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:00007ffea0240488 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007f4649a7c6c7
RDX: 0000000000000200 RSI: 00007ffea0241630 RDI: 00000000ffffff9c
RBP: 00007f4649ac8336 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000207 R12: 00007ffea0241630
R13: 00007f4649ac8336 R14: 000000000000af85 R15: 0000000000000007
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x15e pfn:0x11f328
flags: 0x4000000000000000(zone=1)
raw: 4000000000000000 ffffea00047cca48 ffffea00049707c8 0000000000000000
raw: 000000000000015e 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 438, tgid 438 (syz-executor.0), ts 42999775706, free_ts 43103733920
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x234/0x260 mm/page_alloc.c:1468
 prep_new_page mm/page_alloc.c:1476 [inline]
 get_page_from_freelist+0x21eb/0x2270 mm/page_alloc.c:3402
 __alloc_pages_noprof+0x3e6/0x8a0 mm/page_alloc.c:4660
 __folio_alloc_noprof+0x14/0x80 mm/page_alloc.c:4692
 do_cow_fault mm/memory.c:4950 [inline]
 do_fault mm/memory.c:5058 [inline]
 do_pte_missing+0x54f/0x4360 mm/memory.c:3903
 handle_pte_fault mm/memory.c:5380 [inline]
 __handle_mm_fault mm/memory.c:5523 [inline]
 handle_mm_fault+0x1551/0x2180 mm/memory.c:5688
 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x40e/0x720 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:623
page last free pid 439 tgid 439 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1088 [inline]
 free_unref_folios+0x7b9/0x11e0 mm/page_alloc.c:2614
 folios_put_refs+0x500/0x600 mm/swap.c:1024
 free_pages_and_swap_cache+0x2e6/0x620 mm/swap_state.c:329
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
 tlb_flush_mmu+0x435/0x720 mm/mmu_gather.c:373
 tlb_finish_mmu+0xdb/0x200 mm/mmu_gather.c:465
 exit_mmap+0x48e/0xb30 mm/mmap.c:3354
 __mmput+0x95/0x310 kernel/fork.c:1346
 mmput+0x63/0x80 kernel/fork.c:1368
 exit_mm kernel/exit.c:565 [inline]
 do_exit+0xa8e/0x29d0 kernel/exit.c:861
 do_group_exit+0x21f/0x2e0 kernel/exit.c:1023
 get_signal+0x162b/0x1770 kernel/signal.c:2909
 arch_do_signal_or_restart+0x96/0x790 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x56/0x120 kernel/entry/common.c:218
 do_syscall_64+0x60/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Memory state around the buggy address:
 ffff88811f327f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88811f327f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88811f328000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88811f328080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88811f328100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs error (device loop0): ext4_xattr_inode_iget:440: comm syz-executor: inode #1: comm syz-executor: iget: illegal inode #
EXT4-fs error (device loop0): ext4_xattr_inode_iget:445: comm syz-executor: error while reading EA inode 1 err=-117