linux-kernel - [patch] eeprom/idt_89hpesx: freeing devm

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

Message-ID: <20170126090145.GA942@mwanda>
Date:   Thu, 26 Jan 2017 12:01:46 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Serge Semin <fancer.lancer@...il.com>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [patch] eeprom/idt_89hpesx: freeing devm_ pointer with kfree()

"pdev->ee_file" was allocated with devm_kmalloc() so freeing it with
kfree() is a double free.  In fact, we don't need to free it at all.

Fixes: cfad6425382e ("eeprom: Add IDT 89HPESx EEPROM/CSR driver")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/misc/eeprom/idt_89hpesx.c b/drivers/misc/eeprom/idt_89hpesx.c
index 25d47d09e1cb..f5f2c5a8d9b0 100644
--- a/drivers/misc/eeprom/idt_89hpesx.c
+++ b/drivers/misc/eeprom/idt_89hpesx.c
@@ -1359,7 +1359,6 @@ static int idt_create_sysfs_files(struct idt_89hpesx_dev *pdev)
 	pdev->ee_file->size = pdev->eesize;
 	ret = sysfs_create_bin_file(&dev->kobj, pdev->ee_file);
 	if (ret != 0) {
-		kfree(pdev->ee_file);
 		dev_err(dev, "Failed to create EEPROM sysfs-node");
 		return ret;
 	}
@@ -1381,9 +1380,6 @@ static void idt_remove_sysfs_files(struct idt_89hpesx_dev *pdev)
 
 	/* Remove EEPROM sysfs file */
 	sysfs_remove_bin_file(&dev->kobj, pdev->ee_file);
-
-	/* Free memory allocated for bin_attribute structure */
-	kfree(pdev->ee_file);
 }
 
 /*