Hi Florian,

On 19-11-15 08:08, Marco Felsch wrote:

Hi Florian,

On 19-11-14 15:01, Florian Fainelli wrote:

quoted

Hello Marco,

On 11/14/19 10:12 AM, Marco Felsch wrote:

quoted

Hi Florian,

first of all, many thanks for your work on this series =) I picked your
and Arnd patches to make it compilable. Now it's compiling but my imx6q
board didn't boot anymore. I debugged the code and found that the branch
to 'start_kernel' won't be reached

8<------- arch/arm/kernel/head-common.S -------
....

#ifdef CONFIG_KASAN
        bl      kasan_early_init
#endif
	mov     lr, #0
	b       start_kernel
ENDPROC(__mmap_switched)

....
8<----------------------------------------------

Now, I found also that 'KASAN_SHADOW_OFFSET' isn't set due to missing
'CONFIG_KASAN_SHADOW_OFFSET' and so no '-fasan-shadow-offset=xxxxx' is
added. Can that be the reason why my board isn't booted anymore?

The latest that I have is here, though not yet submitted since I needed
to solve one issue on a specific platform with a lot of memory:

https://github.com/ffainelli/linux/pull/new/kasan-v7

Thanks for that hint, I will try this series too :) I read that you
wanna prepare a v7 but didn't found it ^^

quoted

Can you share your branch as well? I did not pick all of Arnd's patches
since some appeared to be seemingly independent from KASan on ARM. This
is the KASAN related options that are set in my configuration:

Of course I will push it to github and inform you shortly.

Here comes the link:
https://github.com/medude/linux/tree/v5.4/topic/kasan-arm.v7

I just applied Arnds Patche which you didn't added into your v7.

quoted

grep KASAN build/linux-custom/.config
CONFIG_HAVE_ARCH_KASAN=y
CONFIG_CC_HAS_KASAN_GENERIC=y
CONFIG_KASAN=y
CONFIG_KASAN_GENERIC=y
CONFIG_KASAN_OUTLINE=y
# CONFIG_KASAN_INLINE is not set
CONFIG_KASAN_STACK=1
CONFIG_TEST_KASAN=m

My config is:

CONFIG_HAVE_ARCH_KASAN=y
CONFIG_CC_HAS_KASAN_GENERIC=y
CONFIG_KASAN=y
CONFIG_KASAN_GENERIC=y
CONFIG_KASAN_OUTLINE=y
# CONFIG_KASAN_INLINE is not set
CONFIG_KASAN_STACK=1
# CONFIG_TEST_KASAN is not set

quoted

are you using something different by any chance?

Unfortunately not.

With your v7 it is working on my imx6 but unfortunately I can't run my
gstreamer testcase. My CPU load goes to 100% after starting gstreamer
and nothing happens.. But the test_kasan module works =) So I decided to
check a imx6quadplus but this target did not boot.. I used another
toolchain for the imx6quadplus gcc-9 instead of gcc-8. So it seems that
something went wrong during compilation. Because you didn't changed
something within the logic.

I wonder why we must not define the CONFIG_KASAN_SHADOW_OFFSET for arm.

Regards,
  Marco

Regards,
  Marco

quoted

-- 
Florian

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