[v1] fs/ntfs3: Break dir enumeration if directory contents error

[PATCH] fs/ntfs3: Break dir enumeration if directory contents error

Posted by Konstantin Komarov 1 year, 9 months ago

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Cc: stable@vger.kernel.org
---
 fs/ntfs3/dir.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ntfs3/dir.c b/fs/ntfs3/dir.c
index 5cf3d9decf64..45e556fd7c54 100644
--- a/fs/ntfs3/dir.c
+++ b/fs/ntfs3/dir.c
@@ -475,6 +475,7 @@ static int ntfs_readdir(struct file *file, struct dir_context *ctx)
 		vbo = (u64)bit << index_bits;
 		if (vbo >= i_size) {
 			ntfs_inode_err(dir, "Looks like your dir is corrupt");
+			ctx->pos = eod;
 			err = -EINVAL;
 			goto out;
 		}
-- 
2.34.1

[PATCH v2] fs/ntfs3: Break dir enumeration if directory contents error

Posted by Konstantin Komarov 1 year, 8 months ago

If we somehow attempt to read beyond the directory size, an error
is supposed to be returned.

However, in some cases, read requests do not stop and instead enter
into a loop.

To avoid this, we set the position in the directory to the end.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Cc: stable@vger.kernel.org
---
 fs/ntfs3/dir.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ntfs3/dir.c b/fs/ntfs3/dir.c
index 5cf3d9decf64..45e556fd7c54 100644
--- a/fs/ntfs3/dir.c
+++ b/fs/ntfs3/dir.c
@@ -475,6 +475,7 @@ static int ntfs_readdir(struct file *file, struct dir_context *ctx)
 		vbo = (u64)bit << index_bits;
 		if (vbo >= i_size) {
 			ntfs_inode_err(dir, "Looks like your dir is corrupt");
+			ctx->pos = eod;
 			err = -EINVAL;
 			goto out;
 		}
-- 
2.34.1