linux-kernel - [PATCH] clk: mediatek: fix of

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230422084331.47198-1-u201911157@hust.edu.cn>
Date:   Sat, 22 Apr 2023 08:43:31 +0000
From:   Bosi Zhang <u201911157@...t.edu.cn>
To:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Ikjoon Jang <ikjn@...omium.org>,
        Weiyi Lu <weiyi.lu@...iatek.com>,
        Chun-Jie Chen <chun-jie.chen@...iatek.com>
Cc:     hust-os-kernel-patches@...glegroups.com,
        Bosi Zhang <u201911157@...t.edu.cn>,
        Dongliang Mu <dzm91@...t.edu.cn>, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH] clk: mediatek: fix of_iomap memory leak

Smatch reports:
drivers/clk/mediatek/clk-mtk.c:583 mtk_clk_simple_probe() warn:
    'base' from of_iomap() not released on lines: 496.

This problem was also found in linux-next. In mtk_clk_simple_probe(),
base is not released when handling errors
if clk_data is not existed, which may cause a leak.
So free_base should be added here to release base.

Fixes: c58cd0e40ffa ("clk: mediatek: Add mtk_clk_simple_probe() to simplify clock providers")
Signed-off-by: Bosi Zhang <u201911157@...t.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@...t.edu.cn>
---
The issue is found by static analysis and remains untested.
---
 drivers/clk/mediatek/clk-mtk.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index fd2214c3242f..3c50f48e93a7 100644
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -500,8 +500,10 @@ static int __mtk_clk_simple_probe(struct platform_device *pdev,
 	num_clks += mcd->num_mux_clks + mcd->num_divider_clks;
 
 	clk_data = mtk_alloc_clk_data(num_clks);
-	if (!clk_data)
-		return -ENOMEM;
+	if (!clk_data) {
+		r = -ENOMEM;
+		goto free_base;
+	}
 
 	if (mcd->fixed_clks) {
 		r = mtk_clk_register_fixed_clks(mcd->fixed_clks,
@@ -599,6 +601,7 @@ static int __mtk_clk_simple_probe(struct platform_device *pdev,
 					      mcd->num_fixed_clks, clk_data);
 free_data:
 	mtk_free_clk_data(clk_data);
+free_base:
 	if (mcd->shared_io && base)
 		iounmap(base);
 	return r;
-- 
2.34.1