[PATCH] UBIFS: Fix possible memory leak in ubifs_readdir()

From: Richard Weinberger
Date: Mon Oct 12 2015 - 17:36:16 EST


If ubifs_tnc_next_ent() returns something else than -ENOENT
we leak file->private_data.

Signed-off-by: Richard Weinberger <richard@xxxxxx>
---
fs/ubifs/dir.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 5c27c66..cb88ea3 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -449,13 +449,14 @@ static int ubifs_readdir(struct file *file, struct dir_context *ctx)
}

out:
+ kfree(file->private_data);
+ file->private_data = NULL;
+
if (err != -ENOENT) {
ubifs_err(c, "cannot find next direntry, error %d", err);
return err;
}

- kfree(file->private_data);
- file->private_data = NULL;
/* 2 is a special value indicating that there are no more direntries */
ctx->pos = 2;
return 0;
--
2.5.0

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