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powerpc/pseries: Add null property check to pseries_discover_pic() 

The return value of of_get_property() isn't checked before it is passed
to the strstr() function, if it happens that the return value is null
then this will result in a null pointer being dereferenced.

Add a check to see if the return value of of_get_property() is null and
if it is continue straight on to the next node.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Reviewed-by: Chris Smart <chris@distroguy.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Suraj Jitindar Singh 2016-04-28 15:53:45 +10:00 committed by Michael Ellerman
parent 9e44754755
commit b2ed059642
1 changed files with 2 additions and 0 deletions
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2
arch/powerpc/platforms/pseries/setup.c
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@ -235,6 +235,8 @@ static void __init pseries_discover_pic(void)
for_each_node_by_name(np, "interrupt-controller") {
typep = of_get_property(np, "compatible", NULL);
if (!typep)
continue;
if (strstr(typep, "open-pic")) {
pSeries_mpic_node = of_node_get(np);
ppc_md.init_IRQ = pseries_mpic_init_IRQ;