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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 ffff88812fdf0000 by task syz-executor.3/6788

CPU: 0 PID: 6788 Comm: syz-executor.3 Tainted: G        W         5.10.214-syzkaller-00187-ge6f44899ce5d #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_unlinkat fs/namei.c:4076 [inline]
 __se_sys_unlinkat fs/namei.c:4070 [inline]
 __x64_sys_unlinkat+0xdf/0xf0 fs/namei.c:4070
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7fae4e3ca687
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:00007ffdd27cf508 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007fae4e3ca687
RDX: 0000000000000200 RSI: 00007ffdd27d06b0 RDI: 00000000ffffff9c
RBP: 00007fae4e427636 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000207 R12: 00007ffdd27d06b0
R13: 00007fae4e427636 R14: 00000000000514b5 R15: 0000000000000007

The buggy address belongs to the page:
page:ffffea0004bf7c00 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x1 pfn:0x12fdf0
flags: 0x4000000000000000()
raw: 4000000000000000 ffffea00049d3408 ffffea0004804008 0000000000000000
raw: 0000000000000001 0000000000000002 00000000ffffff7f 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 0x112cca(GFP_HIGHUSER_MOVABLE|__GFP_NOWARN|__GFP_NORETRY), pid 7450, ts 329035081844, free_ts 329251528301
 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
 __alloc_pages include/linux/gfp.h:544 [inline]
 __alloc_pages_node include/linux/gfp.h:557 [inline]
 alloc_pages_node include/linux/gfp.h:571 [inline]
 alloc_pages include/linux/gfp.h:590 [inline]
 __page_cache_alloc include/linux/pagemap.h:290 [inline]
 page_cache_ra_unbounded+0x363/0x890 mm/readahead.c:226
 do_page_cache_ra mm/readahead.c:277 [inline]
 ondemand_readahead+0x863/0xc60 mm/readahead.c:559
 page_cache_async_ra+0x294/0x2d0 mm/readahead.c:617
 page_cache_async_readahead include/linux/pagemap.h:860 [inline]
 generic_file_buffered_read+0x8a8/0x2ad0 mm/filemap.c:2262
 generic_file_read_iter+0x107/0x6b0 mm/filemap.c:2568
 ext4_file_read_iter+0x287/0x4d0
 call_read_iter include/linux/fs.h:2015 [inline]
 generic_file_splice_read+0x4aa/0x780 fs/splice.c:311
 do_splice_to fs/splice.c:788 [inline]
 splice_direct_to_actor+0x419/0xba0 fs/splice.c:867
 do_splice_direct+0x27f/0x3c0 fs/splice.c:976
 do_sendfile+0x8f4/0x10e0 fs/read_write.c:1257
 __do_sys_sendfile64 fs/read_write.c:1318 [inline]
 __se_sys_sendfile64 fs/read_write.c:1304 [inline]
 __x64_sys_sendfile64+0x1ce/0x230 fs/read_write.c:1304
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 free_pcp_prepare mm/page_alloc.c:1421 [inline]
 free_unref_page_prepare+0x2ae/0x2d0 mm/page_alloc.c:3336
 free_unref_page_list+0x122/0xb20 mm/page_alloc.c:3443
 release_pages+0xea0/0xef0 mm/swap.c:1103
 __pagevec_release+0x84/0x100 mm/swap.c:1123
 pagevec_release include/linux/pagevec.h:88 [inline]
 truncate_inode_pages_range+0xa81/0x1ae0 mm/truncate.c:367
 truncate_inode_pages mm/truncate.c:473 [inline]
 truncate_inode_pages_final+0xc1/0xd0 mm/truncate.c:524
 ext4_evict_inode+0x4e0/0x1730 fs/ext4/inode.c:225
 evict+0x2a3/0x6c0 fs/inode.c:577
 iput_final fs/inode.c:1697 [inline]
 iput+0x632/0x7e0 fs/inode.c:1723
 do_unlinkat+0x48e/0x8b0 fs/namei.c:4042
 __do_sys_unlink fs/namei.c:4082 [inline]
 __se_sys_unlink fs/namei.c:4080 [inline]
 __x64_sys_unlink+0x49/0x50 fs/namei.c:4080
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6

Memory state around the buggy address:
 ffff88812fdeff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88812fdeff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88812fdf0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88812fdf0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88812fdf0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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