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From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>, <erhard_f@mailbox.org>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH] powerpc/kasan: Fix stack overflow by increasing THREAD_SHIFT
Date: Wed,  8 Apr 2020 15:58:49 +0000 (UTC)	[thread overview]
Message-ID: <2c50f3b1c9bbaa4217c9a98f3044bd2a36c46a4f.1586361277.git.christophe.leroy@c-s.fr> (raw)

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: 2edb16efc899 ("powerpc/32: Add KASAN support")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=207129
Reported-by: <erhard_f@mailbox.org>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 05d20a8d6581..4444511f9bbc 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -771,6 +771,7 @@ 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
-- 
2.25.0


WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>, <erhard_f@mailbox.org>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH] powerpc/kasan: Fix stack overflow by increasing THREAD_SHIFT
Date: Wed,  8 Apr 2020 15:58:49 +0000 (UTC)	[thread overview]
Message-ID: <2c50f3b1c9bbaa4217c9a98f3044bd2a36c46a4f.1586361277.git.christophe.leroy@c-s.fr> (raw)

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: 2edb16efc899 ("powerpc/32: Add KASAN support")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=207129
Reported-by: <erhard_f@mailbox.org>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 05d20a8d6581..4444511f9bbc 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -771,6 +771,7 @@ 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
-- 
2.25.0


             reply	other threads:[~2020-04-08 15:58 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-08 15:58 Christophe Leroy [this message]
2020-04-08 15:58 ` [PATCH] powerpc/kasan: Fix stack overflow by increasing THREAD_SHIFT Christophe Leroy
2020-05-20 10:59 ` Michael Ellerman
2020-05-20 10:59   ` Michael Ellerman

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