linux-kernel - [PATCH 01/24] mtd/maps/pismo: remove dangling pointer and a leak

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]

Date:	Sat, 20 Mar 2010 15:12:42 +0100
From:	Wolfram Sang <w.sang@...gutronix.de>
To:	kernel-janitors@...r.kernel.org
Cc:	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
	Wolfram Sang <w.sang@...gutronix.de>,
	Russell King <rmk+kernel@....linux.org.uk>,
	David Woodhouse <David.Woodhouse@...el.com>,
	linux-mtd@...ts.infradead.org
Subject: [PATCH 01/24] mtd/maps/pismo: remove dangling pointer and a leak

While looking for drivers which forgot to clear i2c_clientdata before freeing
the data structure it points to, I found that the pismo driver even has a leak
on the probe error path.

Signed-off-by: Wolfram Sang <w.sang@...gutronix.de>
Cc: Russell King <rmk+kernel@....linux.org.uk>
Cc: David Woodhouse <David.Woodhouse@...el.com>
---
 drivers/mtd/maps/pismo.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/mtd/maps/pismo.c b/drivers/mtd/maps/pismo.c
index 30e12c8..86081bc 100644
--- a/drivers/mtd/maps/pismo.c
+++ b/drivers/mtd/maps/pismo.c
@@ -233,6 +233,7 @@ static int __devexit pismo_remove(struct i2c_client *client)
 	/* FIXME: set_vpp needs saner arguments */
 	pismo_setvpp_remove_fix(pismo);
 
+	i2c_set_clientdata(client, NULL);
 	kfree(pismo);
 
 	return 0;
@@ -271,7 +272,7 @@ static int __devinit pismo_probe(struct i2c_client *client,
 	ret = pismo_eeprom_read(client, &eeprom, 0, sizeof(eeprom));
 	if (ret < 0) {
 		dev_err(&client->dev, "error reading EEPROM: %d\n", ret);
-		return ret;
+		goto exit_free;
 	}
 
 	dev_info(&client->dev, "%.15s board found\n", eeprom.board);
@@ -282,6 +283,11 @@ static int __devinit pismo_probe(struct i2c_client *client,
 				      pdata->cs_addrs[i]);
 
 	return 0;
+
+ exit_free:
+	i2c_set_clientdata(client, NULL);
+	kfree(prismo);
+	return ret;
 }
 
 static const struct i2c_device_id pismo_id[] = {
-- 
1.7.0

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/