EXT4-fs error (device loop0): ext4_free_branches:1030: inode #13: comm syz-executor550: invalid indirect mapped block 8 (level 2)
EXT4-fs (loop0): Remounting filesystem read-only
EXT4-fs (loop0): 1 truncate cleaned up
EXT4-fs (loop0): mounted filesystem without journal. Opts: max_batch_time=0x0000000000008001,errors=continue,errors=remount-ro,minixdf,jqfmt=vfsv0,usrjquota=.smackfsfloor=ext4. Quota mode: writeback.
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BUG: KASAN: use-after-free in ext4_search_dir+0xee/0x1b0 fs/ext4/namei.c:1544
Read of size 1 at addr ffff888069487595 by task syz-executor550/3569

CPU: 1 PID: 3569 Comm: syz-executor550 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 print_address_description+0x63/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
 ext4_search_dir+0xee/0x1b0 fs/ext4/namei.c:1544
 ext4_find_inline_entry+0x4b6/0x5e0 fs/ext4/inline.c:1704
 __ext4_find_entry+0x2b0/0x1b20 fs/ext4/namei.c:1617
 ext4_lookup_entry fs/ext4/namei.c:1772 [inline]
 ext4_lookup+0x3c6/0xaa0 fs/ext4/namei.c:1840
 lookup_one_qstr_excl+0x117/0x240 fs/namei.c:1563
 filename_create+0x293/0x530 fs/namei.c:3836
 do_mkdirat+0xb3/0x520 fs/namei.c:4080
 __do_sys_mkdirat fs/namei.c:4105 [inline]
 __se_sys_mkdirat fs/namei.c:4103 [inline]
 __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4103
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe49710d649
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 1f 00 00 90 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:00007fffa692cab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fe49710d649
RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000003
R10: 00000000000001be R11: 0000000000000246 R12: 00007fe497151218
R13: 0000000000000000 R14: 431bde82d7b634db R15: 00007fffa692cb30
 </TASK>

The buggy address belongs to the page:
page:ffffea0001a521c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x69487
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 ffffea0001a52208 ffffea0001a52188 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 0x8(__GFP_MOVABLE), pid 1, ts 14737508478, free_ts 15896594613
 split_map_pages+0x246/0x510 mm/compaction.c:99
 isolate_freepages_range+0x47c/0x4e0 mm/compaction.c:749
 alloc_contig_range+0xc2b/0xf90 mm/page_alloc.c:9216
 __alloc_contig_pages mm/page_alloc.c:9240 [inline]
 alloc_contig_pages+0x3ea/0x4e0 mm/page_alloc.c:9320
 debug_vm_pgtable_alloc_huge_page+0xb9/0x110 mm/debug_vm_pgtable.c:1085
 init_args+0xc62/0xf50 mm/debug_vm_pgtable.c:1207
 debug_vm_pgtable+0xaa/0x470 mm/debug_vm_pgtable.c:1245
 do_one_initcall+0x22b/0x7a0 init/main.c:1302
 do_initcall_level+0x157/0x210 init/main.c:1375
 do_initcalls+0x49/0x90 init/main.c:1391
 kernel_init_freeable+0x425/0x5c0 init/main.c:1615
 kernel_init+0x19/0x290 init/main.c:1506
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1340 [inline]
 free_pcp_prepare mm/page_alloc.c:1391 [inline]
 free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
 free_contig_range+0x95/0xf0 mm/page_alloc.c:9342
 destroy_args+0xfe/0x980 mm/debug_vm_pgtable.c:1018
 debug_vm_pgtable+0x40d/0x470 mm/debug_vm_pgtable.c:1331
 do_one_initcall+0x22b/0x7a0 init/main.c:1302
 do_initcall_level+0x157/0x210 init/main.c:1375
 do_initcalls+0x49/0x90 init/main.c:1391
 kernel_init_freeable+0x425/0x5c0 init/main.c:1615
 kernel_init+0x19/0x290 init/main.c:1506
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

Memory state around the buggy address:
 ffff888069487480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888069487500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888069487580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                         ^
 ffff888069487600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888069487680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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