linux-kernel - [PATCH 5.9 303/391] ubifs: dent: Fix some potential memory leaks while iterating entries

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Message-Id: <20201103203407.549317349@linuxfoundation.org>
Date:   Tue,  3 Nov 2020 21:35:54 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Zhihao Cheng <chengzhihao1@...wei.com>,
        Richard Weinberger <richard@....at>
Subject: [PATCH 5.9 303/391] ubifs: dent: Fix some potential memory leaks while iterating entries

From: Zhihao Cheng <chengzhihao1@...wei.com>

commit 58f6e78a65f1fcbf732f60a7478ccc99873ff3ba upstream.

Fix some potential memory leaks in error handling branches while
iterating dent entries. For example, function dbg_check_dir()
forgets to free pdent if it exists.

Signed-off-by: Zhihao Cheng <chengzhihao1@...wei.com>
Cc: <stable@...r.kernel.org>
Fixes: 1e51764a3c2ac05a2 ("UBIFS: add new flash file system")
Signed-off-by: Richard Weinberger <richard@....at>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/ubifs/debug.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -1123,6 +1123,7 @@ int dbg_check_dir(struct ubifs_info *c,
 			err = PTR_ERR(dent);
 			if (err == -ENOENT)
 				break;
+			kfree(pdent);
 			return err;
 		}