Commit-ID: eb737b8f446044df327b30f24416be0cae35d4aa
Gitweb: https://git.kernel.org/tip/eb737b8f446044df327b30f24416be0cae35d4aa
Author: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
AuthorDate: Tue, 4 Jun 2019 13:17:51 +0300
Committer: Marc Zyngier <marc.zyngier@xxxxxxx>
CommitDate: Wed, 5 Jun 2019 09:35:11 +0100
irqchip/ti-sci-inta: Fix kernel crash if irq_create_fwspec_mapping fail
irq_create_fwspec_mapping() can fail, returning 0 as parent_virq. In this
case vint_desc is going to be NULL in ti_sci_inta_alloc_irq() which will
cause NULL pointer dereference.
Also note that irq_create_fwspec_mapping() returns 'unsigned int' so the
check '<=' was wrong.
Use -EINVAL if irq_create_fwspec_mapping() returned with 0.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
drivers/irqchip/irq-ti-sci-inta.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/irqchip/irq-ti-sci-inta.c b/drivers/irqchip/irq-ti-sci-inta.c
index 011b60a49e3f..ef4d625d2d80 100644
--- a/drivers/irqchip/irq-ti-sci-inta.c
+++ b/drivers/irqchip/irq-ti-sci-inta.c
@@ -159,9 +159,9 @@ static struct ti_sci_inta_vint_desc *ti_sci_inta_alloc_parent_irq(struct irq_dom
parent_fwspec.param[1] = vint_desc->vint_id;
parent_virq = irq_create_fwspec_mapping(&parent_fwspec);
- if (parent_virq <= 0) {
+ if (parent_virq == 0) {
kfree(vint_desc);
- return ERR_PTR(parent_virq);
+ return ERR_PTR(-EINVAL);
}
vint_desc->parent_virq = parent_virq;
|