[RFC PATCH 0/2] toolchain: build all user space with sanitizer on glibc

Hauke Mehrtens hauke at hauke-m.de
Wed Jan 4 15:35:53 PST 2023

On 1/4/23 18:39, Christian Marangi wrote:
> On Sun, Jan 17, 2021 at 06:10:34PM +0100, Hauke Mehrtens wrote:
>> This patch allows to build most the OpenWrt user space with address and
>> undefined behavior sanitizer activated by default.
>> This only works with glibc and gcc 10 and I only tested this on x86 64
>> so far. It is not intended to activate this by default ever, but this is
>> helpful to detect (security) bugs in our applications.
>> The first patch adds a work around for a problem with our Kconfig
>> system, I did not fully  understand the problems and only provided a
>> workaround for it, if someone has any idea what is going wrong there
>> this would be helpful.
>> I already found some problems like memory leaks and a use after free
>> problem, will send separate mails for the later.
>> When these sanitizers are activated the OpenWrt userspace needs
>> significant more memory, use at least 256MB for a basic system.
>> TODOs:
>>   * Fix the Kconfig recursive dependency problem
>>   * Test this on more than x86 / 64
>>   * Make it depend on GCC 10 or wait till GCC 10 is the default.
> This is a bit of necroposting... But any news with this? Considering we
> are switching to gcc12 by default i think these feature are now mature
> enough to be finally introduced.


I was trying it again some days ago with gcc 12.
I am still running into a bug with the script which generates the 
Kconfig. It has some problems with the iw Makefile which has two build 

I will update my branch in the next days. I do not know if I find the 
time to look into the Kconfig problem.


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