From: Maxim Levitsky <maximlevitsky@gmail.com>
Date: Sat, 8 Jan 2011 23:25:06 +0000 (+0200)
Subject: mtd: mtd_blkdevs: fix double free on error path
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=bd637f6f22235b4613f9ab6555e8088a455c1ed4;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

mtd: mtd_blkdevs: fix double free on error path

This one liner patch fixes double free that will occur if add_mtd_blktrans_dev
fails. On failure it frees the input argument, but all its users also free it
on error which is natural thing to do. Thus don't free it.

All credit for finding that bug belongs to reporters of the bug in the android bugzilla
http://code.google.com/p/android/issues/detail?id=13761

Commit message tweaked by Artem.

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: stable@kernel.org
---

diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index cb20c67995d..e0a2373bf0e 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -413,7 +413,6 @@ error3:
 error2:
 	list_del(&new->list);
 error1:
-	kfree(new);
 	return ret;
 }