From 2cf3a11494b15949835ff92a7af15f979ac37bbd Mon Sep 17 00:00:00 2001 From: Marcin Slusarz Date: Sat, 28 Mar 2009 18:44:24 +0100 Subject: [MTD] fix use after free in register_mtd_blktrans Reported-by: Dan Carpenter Cc: Christoph Hellwig Signed-off-by: Marcin Slusarz Signed-off-by: David Woodhouse --- drivers/mtd/mtd_blkdevs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/mtd/mtd_blkdevs.c') diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index 1409f01406f..4109e0bb94f 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -382,11 +382,12 @@ int register_mtd_blktrans(struct mtd_blktrans_ops *tr) tr->blkcore_priv->thread = kthread_run(mtd_blktrans_thread, tr, "%sd", tr->name); if (IS_ERR(tr->blkcore_priv->thread)) { + int ret = PTR_ERR(tr->blkcore_priv->thread); blk_cleanup_queue(tr->blkcore_priv->rq); unregister_blkdev(tr->major, tr->name); kfree(tr->blkcore_priv); mutex_unlock(&mtd_table_mutex); - return PTR_ERR(tr->blkcore_priv->thread); + return ret; } INIT_LIST_HEAD(&tr->devs); -- cgit v1.2.3 From 1f24b5a8ecbb2a3c7080f418974d40e3ffedb221 Mon Sep 17 00:00:00 2001 From: David Brownell Date: Thu, 26 Mar 2009 00:42:41 -0700 Subject: [MTD] driver model updates Update driver model support in the MTD framework, so it fits better into the current udev-based hotplug framework: - Each mtd_info now has a device node. MTD drivers should set the dev.parent field to point to the physical device, before setting up partitions or otherwise declaring MTDs. - Those device nodes always map to /sys/class/mtdX device nodes, which no longer depend on MTD_CHARDEV. - Those mtdX sysfs nodes have a "starter set" of attributes; it's not yet sufficient to replace /proc/mtd. - Enabling MTD_CHARDEV provides /sys/class/mtdXro/ nodes and the /sys/class/mtd*/dev attributes (for udev, mdev, etc). - Include a MODULE_ALIAS_CHARDEV_MAJOR macro. It'll work with udev creating the /dev/mtd* nodes, not just a static rootfs. So the sysfs structure is pretty much what you'd expect, except that readonly chardev nodes are a bit quirky. Signed-off-by: David Brownell Signed-off-by: David Woodhouse --- drivers/mtd/mtd_blkdevs.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/mtd/mtd_blkdevs.c') diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index 4109e0bb94f..a49a9c8f2cb 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -286,6 +286,7 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new) gd->private_data = new; new->blkcore_priv = gd; gd->queue = tr->blkcore_priv->rq; + gd->driverfs_dev = new->mtd->dev.parent; if (new->readonly) set_disk_ro(gd, 1); -- cgit v1.2.3