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From: Sascha Hauer <s.hauer@pengutronix.de>
To: linux-mtd@lists.infradead.org
Cc: Richard Weinberger <richard@nod.at>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Naga Sureshkumar Relli <nagasure@xilinx.com>,
	stable@vger.kernel.org, kernel@pengutronix.de
Subject: [PATCH] ubifs: Fix wrong memory allocation
Date: Wed,  4 Dec 2019 11:09:58 +0100
Message-ID: <20191204100958.19938-1-s.hauer@pengutronix.de> (raw)

In create_default_filesystem() when we allocate the idx node we must use
the idx_node_size we calculated just one line before, not tmp, which
contains completely other data.

Fixes: c4de6d7e4319 ("ubifs: Refactor create_default_filesystem()")
Cc: stable@vger.kernel.org # v4.20+
Reported-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
Tested-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 fs/ubifs/sb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ubifs/sb.c b/fs/ubifs/sb.c
index 2b7c04bf8983..17c90dff7266 100644
--- a/fs/ubifs/sb.c
+++ b/fs/ubifs/sb.c
@@ -161,7 +161,7 @@ static int create_default_filesystem(struct ubifs_info *c)
 	sup = kzalloc(ALIGN(UBIFS_SB_NODE_SZ, c->min_io_size), GFP_KERNEL);
 	mst = kzalloc(c->mst_node_alsz, GFP_KERNEL);
 	idx_node_size = ubifs_idx_node_sz(c, 1);
-	idx = kzalloc(ALIGN(tmp, c->min_io_size), GFP_KERNEL);
+	idx = kzalloc(ALIGN(idx_node_size, c->min_io_size), GFP_KERNEL);
 	ino = kzalloc(ALIGN(UBIFS_INO_NODE_SZ, c->min_io_size), GFP_KERNEL);
 	cs = kzalloc(ALIGN(UBIFS_CS_NODE_SZ, c->min_io_size), GFP_KERNEL);
 
-- 
2.24.0


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