This is a note to let you know that I've just added the patch titled
PowerCap: Fix an error code in powercap_register_zone()
to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: powercap-fix-an-error-code-in-powercap_register_zone.patch and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Tue Apr 10 13:58:07 CEST 2018
From: Dan Carpenter dan.carpenter@oracle.com Date: Wed, 10 May 2017 22:40:06 +0300 Subject: PowerCap: Fix an error code in powercap_register_zone()
From: Dan Carpenter dan.carpenter@oracle.com
[ Upstream commit 216c4e9db4c9d1d2a382b42880442dc632cd47d9 ]
In the current code we accidentally return the successful result from idr_alloc() instead of a negative error pointer. The caller is looking for an error pointer and so it treats the returned value as a valid pointer.
This one might be a bit serious because if it lets people get around the kernel's protection for remapping NULL. I'm not sure.
Fixes: 75d2364ea0ca (PowerCap: Add class driver) Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Reviewed-by: Srinivas Pandruvada srinivas.pandruvada@linux.intel.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/powercap/powercap_sys.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/powercap/powercap_sys.c +++ b/drivers/powercap/powercap_sys.c @@ -538,6 +538,7 @@ struct powercap_zone *powercap_register_
power_zone->id = result; idr_init(&power_zone->idr); + result = -ENOMEM; power_zone->name = kstrdup(name, GFP_KERNEL); if (!power_zone->name) goto err_name_alloc;
Patches currently in stable-queue which might be from dan.carpenter@oracle.com are
queue-3.18/block-fix-an-error-code-in-add_partition.patch queue-3.18/powercap-fix-an-error-code-in-powercap_register_zone.patch queue-3.18/libceph-null-deref-on-crush_decode-error-path.patch