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Driver core / sysfs fixes for 3.12-rc3

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Here are 2 fixes for 3.12-rc3.  One fixes a sysfs problem with mounting caused
 by 3.12-rc1, and the other is a bug reported by the chromeos developers with
 the driver core.
 
 Both have been in linux-next for a bit.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core / sysfs fixes from Greg KH:
 "Here are 2 fixes for 3.12-rc3.  One fixes a sysfs problem with
  mounting caused by 3.12-rc1, and the other is a bug reported by the
  chromeos developers with the driver core.

  Both have been in linux-next for a bit"

* tag 'driver-core-3.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  driver core : Fix use after free of dev->parent in device_shutdown
  sysfs: Allow mounting without CONFIG_NET
This commit is contained in:
Linus Torvalds 2013-09-29 13:45:23 -07:00
commit 434ac47d0f
1 changed files with 7 additions and 7 deletions
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14
drivers/base/core.c
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@ -2017,7 +2017,7 @@ EXPORT_SYMBOL_GPL(device_move);
*/
void device_shutdown(void)
{
struct device *dev;
struct device *dev, *parent;
spin_lock(&devices_kset->list_lock);
/*
@ -2034,7 +2034,7 @@ void device_shutdown(void)
* prevent it from being freed because parent's
* lock is to be held
*/
get_device(dev->parent);
parent = get_device(dev->parent);
get_device(dev);
/*
* Make sure the device is off the kset list, in the
@ -2044,8 +2044,8 @@ void device_shutdown(void)
spin_unlock(&devices_kset->list_lock);
/* hold lock to avoid race with probe/release */
if (dev->parent)
device_lock(dev->parent);
if (parent)
device_lock(parent);
device_lock(dev);
/* Don't allow any more runtime suspends */
@ -2063,11 +2063,11 @@ void device_shutdown(void)
}
device_unlock(dev);
if (dev->parent)
device_unlock(dev->parent);
if (parent)
device_unlock(parent);
put_device(dev);
put_device(dev->parent);
put_device(parent);
spin_lock(&devices_kset->list_lock);
}