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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Sudeep Dutt <sudeep.dutt@intel.com>
Cc: Ashutosh Dixit <ashutosh.dixit@intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch 1/2] misc: mic: use after free printing error message
Date: Fri, 12 Feb 2016 06:40:26 +0000	[thread overview]
Message-ID: <20160212064026.GD22756@mwanda> (raw)

Swap the printk and kfree() to avoid a use after free bug.

Fixes: 61e9c905df78 ('misc: mic: Enable VOP host side functionality')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/misc/mic/vop/vop_vringh.c b/drivers/misc/mic/vop/vop_vringh.c
index c1dd000..c3613f3 100644
--- a/drivers/misc/mic/vop/vop_vringh.c
+++ b/drivers/misc/mic/vop/vop_vringh.c
@@ -290,9 +290,9 @@ static int vop_virtio_add_device(struct vop_vdev *vdev,
 
 	ret = vop_copy_dp_entry(vdev, argp, &type, &dd);
 	if (ret) {
-		kfree(vdev);
 		dev_err(vop_dev(vdev), "%s %d err %d\n",
 			__func__, __LINE__, ret);
+		kfree(vdev);
 		return ret;
 	}
 

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Sudeep Dutt <sudeep.dutt@intel.com>
Cc: Ashutosh Dixit <ashutosh.dixit@intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch 1/2] misc: mic: use after free printing error message
Date: Fri, 12 Feb 2016 09:40:26 +0300	[thread overview]
Message-ID: <20160212064026.GD22756@mwanda> (raw)

Swap the printk and kfree() to avoid a use after free bug.

Fixes: 61e9c905df78 ('misc: mic: Enable VOP host side functionality')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/misc/mic/vop/vop_vringh.c b/drivers/misc/mic/vop/vop_vringh.c
index c1dd000..c3613f3 100644
--- a/drivers/misc/mic/vop/vop_vringh.c
+++ b/drivers/misc/mic/vop/vop_vringh.c
@@ -290,9 +290,9 @@ static int vop_virtio_add_device(struct vop_vdev *vdev,
 
 	ret = vop_copy_dp_entry(vdev, argp, &type, &dd);
 	if (ret) {
-		kfree(vdev);
 		dev_err(vop_dev(vdev), "%s %d err %d\n",
 			__func__, __LINE__, ret);
+		kfree(vdev);
 		return ret;
 	}
 

             reply	other threads:[~2016-02-12  6:40 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-12  6:40 Dan Carpenter [this message]
2016-02-12  6:40 ` [patch 1/2] misc: mic: use after free printing error message Dan Carpenter

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