ocfs2: Mounting device (7,4) on (node local, slot 0) with ordered data mode.
==================================================================
BUG: KASAN: use-after-free in ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1445 [inline]
BUG: KASAN: use-after-free in ocfs2_claim_suballoc_bits+0x10d3/0x2560 fs/ocfs2/suballoc.c:1982
Read of size 4 at addr ffff8880313fe000 by task syz.4.353/8722

CPU: 1 UID: 0 PID: 8722 Comm: syz.4.353 Not tainted 6.13.0-rc3-syzkaller-00044-gaef25be35d23 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1445 [inline]
 ocfs2_claim_suballoc_bits+0x10d3/0x2560 fs/ocfs2/suballoc.c:1982
 ocfs2_claim_metadata+0x16d/0x580 fs/ocfs2/suballoc.c:2057
 ocfs2_dx_dir_attach_index+0x231/0xf90 fs/ocfs2/dir.c:2308
 ocfs2_expand_inline_dir fs/ocfs2/dir.c:3000 [inline]
 ocfs2_extend_dir+0x439f/0x53c0 fs/ocfs2/dir.c:3182
 ocfs2_prepare_dir_for_insert+0x33b5/0x5c40 fs/ocfs2/dir.c:4287
 ocfs2_symlink+0xd72/0x2d80 fs/ocfs2/namei.c:1873
 vfs_symlink+0x137/0x2e0 fs/namei.c:4669
 do_symlinkat+0x222/0x3a0 fs/namei.c:4695
 __do_sys_symlink fs/namei.c:4716 [inline]
 __se_sys_symlink fs/namei.c:4714 [inline]
 __x64_sys_symlink+0x7a/0x90 fs/namei.c:4714
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8c68d85d29
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8c69c0f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 00007f8c68f75fa0 RCX: 00007f8c68d85d29
RDX: 0000000000000000 RSI: 0000000020000cc0 RDI: 0000000020000dc0
RBP: 00007f8c68e01a20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8c68f75fa0 R15: 00007ffc9cf98fe8
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x404 pfn:0x313fe
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 ffffea0001813ac8 ffffea0001f8b588 0000000000000000
raw: 0000000000000404 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x40c40(GFP_NOFS|__GFP_COMP), pid 8701, tgid 8700 (syz.7.351), ts 234898046424, free_ts 236934300315
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
 prep_new_page mm/page_alloc.c:1564 [inline]
 get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474
 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269
 alloc_pages_noprof mm/mempolicy.c:2348 [inline]
 folio_alloc_noprof+0x128/0x180 mm/mempolicy.c:2355
 filemap_alloc_folio_noprof+0xdf/0x500 mm/filemap.c:1009
 __filemap_get_folio+0x41f/0x940 mm/filemap.c:1951
 pagecache_get_page+0x2c/0x130 mm/folio-compat.c:87
 f2fs_grab_meta_page+0x6b/0x2d0 fs/f2fs/checkpoint.c:46
 write_current_sum_page fs/f2fs/segment.c:2643 [inline]
 write_normal_summaries+0xd8/0x250 fs/f2fs/segment.c:4392
 do_checkpoint+0x22e9/0x3fb0 fs/f2fs/checkpoint.c:1580
 f2fs_write_checkpoint+0x13fc/0x1c80 fs/f2fs/checkpoint.c:1712
 f2fs_issue_checkpoint+0x2e6/0x4e0 fs/f2fs/checkpoint.c:1874
 f2fs_mkdir+0x43f/0x530 fs/f2fs/namei.c:721
 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4311
 do_mkdirat+0x264/0x3a0 fs/namei.c:4334
page last free pid 6848 tgid 6848 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_unref_folios+0xe23/0x1890 mm/page_alloc.c:2704
 folios_put_refs+0x76c/0x860 mm/swap.c:962
 folio_batch_release include/linux/pagevec.h:101 [inline]
 truncate_inode_pages_range+0x460/0x10e0 mm/truncate.c:330
 f2fs_evict_inode+0x262/0x1690 fs/f2fs/inode.c:827
 evict+0x4e8/0x9a0 fs/inode.c:796
 f2fs_put_super+0xaae/0x1150 fs/f2fs/super.c:1677
 generic_shutdown_super+0x139/0x2d0 fs/super.c:642
 kill_block_super+0x44/0x90 fs/super.c:1710
 kill_f2fs_super+0x344/0x690 fs/f2fs/super.c:4972
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
 task_work_run+0x24f/0x310 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff8880313fdf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880313fdf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880313fe000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8880313fe080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8880313fe100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================