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powerpc/kasan: Fix stack overflow by increasing THREAD_SHIFT 

[ Upstream commit edbadaf067 ]

When CONFIG_KASAN is selected, the stack usage is increased.

In the same way as x86 and arm64 architectures, increase
THREAD_SHIFT when CONFIG_KASAN is selected.

Fixes: 2edb16efc8 ("powerpc/32: Add KASAN support")
Reported-by: <erhard_f@mailbox.org>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=207129
Link: https://lore.kernel.org/r/2c50f3b1c9bbaa4217c9a98f3044bd2a36c46a4f.1586361277.git.christophe.leroy@c-s.fr
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Christophe Leroy 2020-04-08 15:58:49 +00:00 committed by Greg Kroah-Hartman
parent a6a0317bf9
commit 91fce7922a
1 changed files with 1 additions and 0 deletions
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arch/powerpc/Kconfig
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@ -747,6 +747,7 @@ config THREAD_SHIFT
range 13 15
default "15" if PPC_256K_PAGES
default "14" if PPC64
default "14" if KASAN
default "13"
help
Used to define the stack size. The default is almost always what you