linux-kernel - [PATCH] fpga: socfpga-a10: disable clk on error in socfpga_a10_fpga

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 for Android: free password hash cracker in your pocket

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

Message-Id: <1512754620-3723-2-git-send-email-atull@kernel.org>
Date:   Fri,  8 Dec 2017 11:37:00 -0600
From:   Alan Tull <atull@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Moritz Fischer <mdf@...nel.org>, Alan Tull <atull@...nel.org>,
        linux-kernel@...r.kernel.org, linux-fpga@...r.kernel.org,
        Alexey Khoroshilov <khoroshilov@...ras.ru>
Subject: [PATCH] fpga: socfpga-a10: disable clk on error in socfpga_a10_fpga_probe()

From: Alexey Khoroshilov <khoroshilov@...ras.ru>

If fpga_mgr_register() fails, a clock is left undisabled.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
Reviewed-by: Moritz Fischer <mdf@...nel.org>
Signed-off-by: Alan Tull <atull@...nel.org>
---
 drivers/fpga/socfpga-a10.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/fpga/socfpga-a10.c b/drivers/fpga/socfpga-a10.c
index f8770af..a46e343 100644
--- a/drivers/fpga/socfpga-a10.c
+++ b/drivers/fpga/socfpga-a10.c
@@ -519,8 +519,14 @@ static int socfpga_a10_fpga_probe(struct platform_device *pdev)
 		return -EBUSY;
 	}
 
-	return fpga_mgr_register(dev, "SoCFPGA Arria10 FPGA Manager",
+	ret = fpga_mgr_register(dev, "SoCFPGA Arria10 FPGA Manager",
 				 &socfpga_a10_fpga_mgr_ops, priv);
+	if (ret) {
+		clk_disable_unprepare(priv->clk);
+		return ret;
+	}
+
+	return 0;
 }
 
 static int socfpga_a10_fpga_remove(struct platform_device *pdev)
-- 
2.7.4