From: Anton Blanchard <anton@samba.org>
To: benh@kernel.crashing.org, mikey@neuling.org,
michael@ellerman.id.au, miltonm@bga.com
Cc: linuxppc-dev@ozlabs.org
Subject: [PATCH 1/3] powerpc: kdump: Fix NULL pointer dereference in irq disable code
Date: Tue, 11 May 2010 12:23:29 +1000 [thread overview]
Message-ID: <20100511022329.GE12203@kryten> (raw)
With sparse irqs we have to check if we have a descriptor before dereferencing
it.
Signed-off-by: Anton Blanchard <anton@samba.org>
---
diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 6f4613d..5182439 100644
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -375,6 +375,9 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
for_each_irq(i) {
struct irq_desc *desc = irq_to_desc(i);
+ if (!desc)
+ continue;
+
if (desc->status & IRQ_INPROGRESS)
desc->chip->eoi(i);
next reply other threads:[~2010-05-11 2:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-11 2:23 Anton Blanchard [this message]
2010-05-11 2:25 ` [PATCH 2/3] powerpc: kdump: CPUs assume the context of the oopsing CPU Anton Blanchard
2010-05-11 2:27 ` [PATCH 3/3] powerpc: kdump: Use chip->shutdown to disable IRQs Anton Blanchard
2010-05-11 4:11 ` Michael Ellerman
2010-05-11 4:14 ` [PATCH 2/3] powerpc: kdump: CPUs assume the context of the oopsing CPU Michael Ellerman
2010-05-11 4:14 ` [PATCH 1/3] powerpc: kdump: Fix NULL pointer dereference in irq disable code Michael Ellerman
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