Patch "pstore: Fix leaked pstore_record in pstore_get_backend_records()" has been added to the 4.12-stable tree

Patch "pstore: Fix leaked pstore_record in pstore_get_backend_records()" has been added to the 4.12-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    pstore: Fix leaked pstore_record in pstore_get_backend_records()

to the 4.12-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     pstore-fix-leaked-pstore_record-in-pstore_get_backend_records.patch
and it can be found in the queue-4.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From f6525b96dd9f68efe374e5aef864975e628de991 Mon Sep 17 00:00:00 2001
From: Douglas Anderson <dianders@chromium.org>
Date: Tue, 30 May 2017 15:50:38 -0700
Subject: pstore: Fix leaked pstore_record in pstore_get_backend_records()

From: Douglas Anderson <dianders@chromium.org>

commit f6525b96dd9f68efe374e5aef864975e628de991 upstream.

When the "if (record->size <= 0)" test is true in
pstore_get_backend_records() it's pretty clear that nobody holds a
reference to the allocated pstore_record, yet we don't free it.

Let's free it.

Fixes: 2a2b0acf768c ("pstore: Allocate records on heap instead of stack")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/pstore/platform.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -846,8 +846,10 @@ void pstore_get_backend_records(struct p
 		record->size = psi->read(record);
 
 		/* No more records left in backend? */
-		if (record->size <= 0)
+		if (record->size <= 0) {
+			kfree(record);
 			break;
+		}
 
 		decompress_record(record);
 		rc = pstore_mkfile(root, record);


Patches currently in stable-queue which might be from dianders@chromium.org are

queue-4.12/pstore-fix-leaked-pstore_record-in-pstore_get_backend_records.patch