| From | stefano.stabellini@eu ... | Subject | [PATCH 08/12] Fix possible NULL pointer dereference in print_IO_APIC | Date | Thu, 3 Jun 2010 14:10:41 +0100 |
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From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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; -- 1.7.0.4
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