[PATCH v3] drm/amd: Fix memory leak according to error branch
felix.kuehling at amd.com
Sat Jun 20 14:56:24 UTC 2020
Am 2020-06-20 um 9:21 a.m. schrieb Julia Lawall:
> On Sat, 20 Jun 2020, Markus Elfring wrote:
>>> The function kobject_init_and_add alloc memory like:
>>> ->kmalloc_slab, in err branch this memory not free. If use
>>> kmemleak, this path maybe catched.
>>> These changes are to add kobject_put in kobject_init_and_add
>>> failed branch, fix potential memleak.
>>> Changes since V2:
>>> *remove duplicate kobject_put in kfd_procfs_init.
>> Under which circumstances are going to improve this change description accordingly?
> Bernard, please update the log message as well. The mail you sent was
> much more clear, but mail just gets lost over time. The log message
> itself should be improved.
The behaviour of kobject_init_and_add is documented in the kernel
* If this function returns an error, kobject_put() must be called to
* properly clean up the memory associated with the object. This is the
* same type of error handling after a call to kobject_add() and kobject
* lifetime rules are the same here.
No need to have a complicated explanation with a call stack in the
change description. Just point to the kernel documentation.
>> Would you like to add the tag “Fixes” to the commit message?
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