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ntfs: return DT_UNKNOWN on inode lookup failure in readdir

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ntfs_reparse_tag_dt_types() returns PTR_ERR(vi) when ntfs_iget()
fails, but its return type is unsigned int and the caller passes
the value straight to dir_emit() as d_type. A stale or corrupt MFT
reference in a directory index thus makes readdir report a garbage
d_type value to userspace.

Return DT_UNKNOWN on lookup failure instead.

Fixes: fc053f05ca ("ntfs: add reparse and ea operations")
Signed-off-by: Baolin Liu <liubaolin@kylinos.cn>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
This commit is contained in:
Baolin Liu 2026-08-21 13:32:30 +08:00 committed by Namjae Jeon
parent 45c13f3f9e
commit 3d3de2aee1
1 changed files with 1 additions and 1 deletions
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2
fs/ntfs/reparse.c
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@ -405,7 +405,7 @@ unsigned int ntfs_reparse_tag_dt_types(struct ntfs_volume *vol, unsigned long mr
vi = ntfs_iget(vol->sb, mref);
if (IS_ERR(vi))
return PTR_ERR(vi);
return DT_UNKNOWN;
reparse_attr = (struct reparse_point *)ntfs_attr_readall(NTFS_I(vi),
AT_REPARSE_POINT, NULL, 0, &attr_size);