lkml.org 
[lkml]   [2022]   [Jul]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH -next] nvmem: core: Fix memleak in nvmem_register()
From
Date
Thanks for your time.

I have made the v2 patch and moving dev_set_name after nvmem_validate_keepouts
to fix the issue, hope you can provide some advice.

Thanks.

在 2022/7/16 16:23, Greg KH 写道:
> On Sat, Jul 16, 2022 at 03:53:52PM +0800, Gaosheng Cui wrote:
>> dev_set_name will alloc memory for nvmem->dev.kobj.name in
>> nvmem_register, when nvmem_validate_keepouts failed, nvmem's
>> memory will be freed and return, but nobody will free memory
>> for nvmem->dev.kobj.name, there will be memleak, so using
>> kfree_const(nvmem->dev.kobj.name) to fix it.
>>
>> Fixes: de0534df9347 ("nvmem: core: fix error handling while validating keepout regions")
>> Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
>> ---
>> drivers/nvmem/core.c | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
>> index 1e3c754efd0d..6c75c9afa5f3 100644
>> --- a/drivers/nvmem/core.c
>> +++ b/drivers/nvmem/core.c
>> @@ -833,6 +833,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
>> rval = nvmem_validate_keepouts(nvmem);
>> if (rval) {
>> ida_free(&nvmem_ida, nvmem->id);
>> + kfree_const(nvmem->dev.kobj.name);
>> kfree(nvmem);
> Something is really wrong, you should never be touching the name pointer
> of a kobject directly like this. Also the device structure itself
> should be cleaning up the memory, not a kfree. So this feels wrong...
>
> greg k-h
> .

\
 
 \ /
  Last update: 2022-07-16 11:59    [W:0.086 / U:0.448 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site