On 01/12/2018 03:08 PM, Tony Lindgren wrote:
* Grygorii Strashko <grygorii.strashko@xxxxxx> [180112 20:36]:
Hi
On 01/10/2018 10:54 PM, Qi Hou wrote:
When more than one GP timers are used as kernel system timers and the
corresponding nodes in device-tree are marked with the same "disabled"
property, then the "attr" field of the property will be initialized
more than once as the property being added to sys file system via
__of_add_property_sysfs().
In __of_add_property_sysfs(), the "name" field of pp->attr.attr is set
directly to the return value of safe_name(), without taking care of
whether it's already a valid pointer to a memory block. If it is, its
old value will always be overwritten by the new one and the memory block
allocated before will a "ghost", then a kmemleak happened.
That the same "disabled" property being added to different nodes of device
tree would cause that kind of kmemleak overhead, at leat once.
To fix it, allocate the property dynamically, and delete static one.
Does it in sync with Keerthy's work [1]
First fixes, then new stuff! Keerthy's work will have to
wait for v4.17, we want that series sitting in Linux next
for several weeks.
Np. just want to be sure every party is aware about each other's work
--
regards,
-grygorii
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