EXT4-fs warning (device loop5): ext4_update_dynamic_rev:1060: updating to rev 1 because of new feature flag, running e2fsck is recommended
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BUG: KASAN: use-after-free in ext4_rename_dir_prepare+0x42e/0x4a0 fs/ext4/namei.c:3696
Read of size 4 at addr ffff88817eecfe02 by task syz-executor.5/30203

CPU: 1 PID: 30203 Comm: syz-executor.5 Not tainted 5.10.150-syzkaller-00396-g6b31c548a114 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x81/0x3c0 mm/kasan/report.c:233
 __kasan_report mm/kasan/report.c:419 [inline]
 kasan_report+0x1a4/0x1f0 mm/kasan/report.c:436
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 ext4_rename_dir_prepare+0x42e/0x4a0 fs/ext4/namei.c:3696
 ext4_cross_rename fs/ext4/namei.c:4204 [inline]
 ext4_rename2+0x1f37/0x45a0 fs/ext4/namei.c:4288
 vfs_rename+0x95e/0xde0 fs/namei.c:4389
 do_renameat2+0x83e/0x1190 fs/namei.c:4536
 __do_sys_renameat2 fs/namei.c:4571 [inline]
 __se_sys_renameat2 fs/namei.c:4568 [inline]
 __x64_sys_renameat2+0xbf/0xd0 fs/namei.c:4568
 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7fb32cb11639
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fb32b885168 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007fb32cc31f80 RCX: 00007fb32cb11639
RDX: ffffffffffffff9c RSI: 00000000200004c0 RDI: 0000000000000004
RBP: 00007fb32cb6cae9 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdfe94e50f R14: 00007fb32b885300 R15: 0000000000022000

The buggy address belongs to the page:
page:ffffea0005fbb3c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x17eecf
flags: 0x8000000000000000()
raw: 8000000000000000 dead000000000100 dead000000000122 0000000000000000
raw: 0000000000000001 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 0x1101cca(GFP_HIGHUSER_MOVABLE|__GFP_WRITE), pid 28680, ts 720777561587, free_ts 721330057708
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2386 [inline]
 prep_new_page mm/page_alloc.c:2392 [inline]
 get_page_from_freelist+0x755/0x810 mm/page_alloc.c:4073
 __alloc_pages_nodemask+0x3b6/0x890 mm/page_alloc.c:5160
 __alloc_pages include/linux/gfp.h:529 [inline]
 __alloc_pages_node include/linux/gfp.h:542 [inline]
 alloc_pages_node include/linux/gfp.h:556 [inline]
 alloc_pages include/linux/gfp.h:575 [inline]
 __page_cache_alloc include/linux/pagemap.h:290 [inline]
 pagecache_get_page+0x567/0x850 mm/filemap.c:1848
 grab_cache_page_write_begin+0x5c/0xa0 mm/filemap.c:3418
 ext4_da_write_begin+0x5c2/0xf10 fs/ext4/inode.c:3056
 generic_perform_write+0x309/0x5b0 mm/filemap.c:3468
 ext4_buffered_write_iter+0x47c/0x610 fs/ext4/file.c:272
 ext4_file_write_iter+0x192/0x1c70 fs/ext4/file.c:689
 call_write_iter include/linux/fs.h:1952 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0xc4a/0xf80 fs/read_write.c:605
 ksys_write+0x198/0x2c0 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:667
 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46
 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:1332 [inline]
 free_pcp_prepare+0x18c/0x1c0 mm/page_alloc.c:1406
 free_unref_page_prepare mm/page_alloc.c:3293 [inline]
 free_unref_page_list+0x11d/0x660 mm/page_alloc.c:3367
 release_pages+0xc24/0xc60 mm/swap.c:1082
 __pagevec_release+0x81/0xf0 mm/swap.c:1102
 pagevec_release include/linux/pagevec.h:88 [inline]
 truncate_inode_pages_range+0x9f8/0x1940 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+0x41f/0x1730 fs/ext4/inode.c:223
 evict+0x2a3/0x6c0 fs/inode.c:577
 iput_final fs/inode.c:1655 [inline]
 iput+0x61f/0x7d0 fs/inode.c:1681
 do_unlinkat+0x51a/0x920 fs/namei.c:3982
 __do_sys_unlink fs/namei.c:4022 [inline]
 __se_sys_unlink fs/namei.c:4020 [inline]
 __x64_sys_unlink+0x49/0x50 fs/namei.c:4020
 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xc6

Memory state around the buggy address:
 ffff88817eecfd00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88817eecfd80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88817eecfe00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88817eecfe80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88817eecff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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