linux-kernel - [PATCH v2 3/5] misc/pvpanic-mmio: Fix error handling in 'pvpanic_mmio

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

Message-Id: <2a5dab18f10db783b27e0579ba66cc38d610734a.1621665058.git.christophe.jaillet@wanadoo.fr>
Date:   Sat, 22 May 2021 08:55:03 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     arnd@...db.de, gregkh@...uxfoundation.org,
        mihai.carabas@...cle.com, andriy.shevchenko@...ux.intel.com,
        pizhenwei@...edance.com, pbonzini@...hat.com,
        bobo.shaobowang@...wei.com, linqiheng@...wei.com
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH v2 3/5] misc/pvpanic-mmio: Fix error handling in 'pvpanic_mmio_probe()'

There is no error handling path in the probe function.
Switch to managed resource so that errors in the probe are handled easily
and simplify the remove function accordingly.

Fixes: b3c0f8774668 ("misc/pvpanic: probe multiple instances")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
v2: add -mmio in the description of the commit
---
 drivers/misc/pvpanic/pvpanic-mmio.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/misc/pvpanic/pvpanic-mmio.c b/drivers/misc/pvpanic/pvpanic-mmio.c
index 4c0841776087..69b31f7adf4f 100644
--- a/drivers/misc/pvpanic/pvpanic-mmio.c
+++ b/drivers/misc/pvpanic/pvpanic-mmio.c
@@ -93,7 +93,7 @@ static int pvpanic_mmio_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	pi = kmalloc(sizeof(*pi), GFP_ATOMIC);
+	pi = devm_kmalloc(dev, sizeof(*pi), GFP_ATOMIC);
 	if (!pi)
 		return -ENOMEM;
 
@@ -114,7 +114,6 @@ static int pvpanic_mmio_remove(struct platform_device *pdev)
 	struct pvpanic_instance *pi = dev_get_drvdata(&pdev->dev);
 
 	pvpanic_remove(pi);
-	kfree(pi);
 
 	return 0;
 }
-- 
2.30.2