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Message-ID: <20231107154846.3766119-15-sashal@kernel.org>
Date: Tue, 7 Nov 2023 10:47:55 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Vincent Whitchurch <vincent.whitchurch@...s.com>,
Russell King <rmk+kernel@...linux.org.uk>,
Sasha Levin <sashal@...nel.org>, linux@...linux.org.uk,
linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 6.5 15/34] ARM: 9320/1: fix stack depot IRQ stack filter
From: Vincent Whitchurch <vincent.whitchurch@...s.com>
[ Upstream commit b0150014878c32197cfa66e3e2f79e57f66babc0 ]
Place IRQ handlers such as gic_handle_irq() in the irqentry section even
if FUNCTION_GRAPH_TRACER is not enabled. Without this, the stack
depot's filter_irq_stacks() does not correctly filter out IRQ stacks in
those configurations, which hampers deduplication and eventually leads
to "Stack depot reached limit capacity" splats with KASAN.
A similar fix was done for arm64 in commit f6794950f0e5ba37e3bbed
("arm64: set __exception_irq_entry with __irq_entry as a default").
Link: https://lore.kernel.org/r/20230803-arm-irqentry-v1-1-8aad8e260b1c@axis.com
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@...s.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
arch/arm/include/asm/exception.h | 4 ----
1 file changed, 4 deletions(-)
diff --git a/arch/arm/include/asm/exception.h b/arch/arm/include/asm/exception.h
index 58e039a851af0..3c82975d46db3 100644
--- a/arch/arm/include/asm/exception.h
+++ b/arch/arm/include/asm/exception.h
@@ -10,10 +10,6 @@
#include <linux/interrupt.h>
-#ifdef CONFIG_FUNCTION_GRAPH_TRACER
#define __exception_irq_entry __irq_entry
-#else
-#define __exception_irq_entry
-#endif
#endif /* __ASM_ARM_EXCEPTION_H */
--
2.42.0
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