linux-kernel - [PATCH v2] soc: renesas: rmobile-sysc: Fix some leaks in rmobile_init_pm

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Message-ID: <20200923113142.GC1473821@mwanda>
Date:   Wed, 23 Sep 2020 14:31:42 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Magnus Damm <magnus.damm@...il.com>,
        Simon Horman <horms+renesas@...ge.net.au>,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH v2] soc: renesas: rmobile-sysc: Fix some leaks in
 rmobile_init_pm_domains()

This code needs to call iounmap() on one error path.

Fixes: 2173fc7cb681 ("ARM: shmobile: R-Mobile: Add DT support for PM domains")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
v2:  The v1 patch potentially led to a use after free.

 drivers/soc/renesas/rmobile-sysc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/soc/renesas/rmobile-sysc.c b/drivers/soc/renesas/rmobile-sysc.c
index 54b616ad4a62..beb1c7211c3d 100644
--- a/drivers/soc/renesas/rmobile-sysc.c
+++ b/drivers/soc/renesas/rmobile-sysc.c
@@ -327,6 +327,7 @@ static int __init rmobile_init_pm_domains(void)
 
 		pmd = of_get_child_by_name(np, "pm-domains");
 		if (!pmd) {
+			iounmap(base);
 			pr_warn("%pOF lacks pm-domains node\n", np);
 			continue;
 		}
-- 
2.28.0