In its_vpe_irq_domain_alloc, when its_vpe_init() returns an error
with i > 0, its_vpe_irq_domain_free may free bitmap and vprop_page,
and then there is a double free in its_vpe_irq_domain_alloc.
Fix it by checking if bitmap is empty in its_vpe_irq_domain_alloc.
If bitmap is empty and i > 0, means that bitmap have been clear and free
in its_vpe_irq_domain_free.
Signed-off-by: Guanrui Huang <guanrui.huang@xxxxxxxxxxxxxxxxx>
---
drivers/irqchip/irq-gic-v3-its.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index fca888b36680..98a1be90caef 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -4562,9 +4562,14 @@ static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq
}
if (err) {
- if (i > 0)
+ if (i > 0) {
its_vpe_irq_domain_free(domain, virq, i);
+ /* bitmap and vprop_page be freed in its_vpe_irq_domain_free */
+ if (bitmap_empty(bitmap, nr_ids))
+ return err;
+ }
+
its_lpi_free(bitmap, base, nr_ids);
its_free_prop_table(vprop_page);
}