https://bugzilla.kernel.org/show_bug.cgi?id=205099

--- Comment #16 from Erhard F. (erhar...@mailbox.org) ---
(In reply to Christophe Leroy from comment #15)
> Would be interesting to try and see if the VMAP_STACK series detects the
> stack overflow.
> Series at
> https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=149973
I just tried that, but in this case the G4 won't boot at all. The kernel loads
but booting gets stuck at a white display with only 2 lines visible where it
tells me it will open the display of the G4s Radeons offb display.

I applied your CONFIG_KASAN_VMALLOC on top of 5.5-rc6 and applied your
VMAP_STACK series afterwards.

 # grep -i kasan .config
CONFIG_HAVE_ARCH_KASAN=y
CONFIG_HAVE_ARCH_KASAN_VMALLOC=y
CONFIG_CC_HAS_KASAN_GENERIC=y
CONFIG_KASAN=y
CONFIG_KASAN_GENERIC=y
# CONFIG_KASAN_OUTLINE is not set
CONFIG_KASAN_INLINE=y
CONFIG_KASAN_STACK=1
CONFIG_KASAN_VMALLOC=y
# CONFIG_TEST_KASAN is not set
CONFIG_KASAN_SHADOW_OFFSET=0xe0000000

 # grep -i vmap .config
CONFIG_HAVE_ARCH_VMAP_STACK=y
CONFIG_VMAP_STACK=y

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