diff options
| author | Hannes Reinecke <hare@suse.de> | 2012-04-16 17:06:25 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-19 02:39:52 +0400 |
| commit | a15d49fd3094cff90e5410ca454a870e0a722fe1 (patch) | |
| tree | f3e458fa4ce3524f756e0faa48d5ed2400c022bf /drivers/base/driver.c | |
| parent | 97ec448aeadff55234368a89c4a07a7ef290a084 (diff) | |
| download | linux-a15d49fd3094cff90e5410ca454a870e0a722fe1.tar.xz | |
driver core: check start node in klist_iter_init_node
klist_iter_init_node() takes a node as a start argument.
However, this node might not be valid anymore.
This patch updates the klist_iter_init_node() and
dependent functions to return an error if so.
All calling functions have been audited to check
for a return code here.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Cc: Greg Kroah-Hartmann <gregkh@linuxfoundation.org>
Cc: Kay Sievers <kay@vrfy.org>
Cc: Stable Kernel <stable@kernel.org>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base/driver.c')
| -rw-r--r-- | drivers/base/driver.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/base/driver.c b/drivers/base/driver.c index 3ec3896c83a6..16f6dd2c4403 100644 --- a/drivers/base/driver.c +++ b/drivers/base/driver.c @@ -49,11 +49,13 @@ int driver_for_each_device(struct device_driver *drv, struct device *start, if (!drv) return -EINVAL; - klist_iter_init_node(&drv->p->klist_devices, &i, - start ? &start->p->knode_driver : NULL); - while ((dev = next_device(&i)) && !error) - error = fn(dev, data); - klist_iter_exit(&i); + error = klist_iter_init_node(&drv->p->klist_devices, &i, + start ? &start->p->knode_driver : NULL); + if (!error) { + while ((dev = next_device(&i)) && !error) + error = fn(dev, data); + klist_iter_exit(&i); + } return error; } EXPORT_SYMBOL_GPL(driver_for_each_device); @@ -83,8 +85,10 @@ struct device *driver_find_device(struct device_driver *drv, if (!drv) return NULL; - klist_iter_init_node(&drv->p->klist_devices, &i, - (start ? &start->p->knode_driver : NULL)); + if (klist_iter_init_node(&drv->p->klist_devices, &i, + (start ? &start->p->knode_driver : NULL)) < 0) + return NULL; + while ((dev = next_device(&i))) if (match(dev, data) && get_device(dev)) break; |