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Subject[PATCH 08/11] Fix possible NULL pointer dereference in print_IO_APIC
Date
Make sure chip_data is not NULL before accessing it (the VIRQ_TIMER
handler and virq handlers in general don't have any chip_data).

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
---
arch/x86/kernel/apic/io_apic.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index eb2789c..c64499c 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1732,6 +1732,8 @@ __apicdebuginit(void) print_IO_APIC(void)
struct irq_pin_list *entry;

cfg = desc->chip_data;
+ if (!cfg)
+ continue;
entry = cfg->irq_2_pin;
if (!entry)
continue;
--
1.5.4.3


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