[Xen-devel] [PATCH 09/11] Fix possible NULL pointer dereference in print_IO_APIC

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

Make sure chip_data is not NULL before accessing it.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
 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 dc69f28..96f6bba 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1690,6 +1690,8 @@ __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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