[PATCH] irqchip/gic-v3: check kasprintf() for failures

[YueHaibing]

We should just return -ENOMEM here if the allocation fails,
otherwise it may cause a panic.

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/irqchip/irq-gic-v3-its-pci-msi.c      | 3 +++
 drivers/irqchip/irq-gic-v3-its-platform-msi.c | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/irqchip/irq-gic-v3-its-pci-msi.c 
b/drivers/irqchip/irq-gic-v3-its-pci-msi.c
index 25a98de..ef3911f 100644
--- a/drivers/irqchip/irq-gic-v3-its-pci-msi.c
+++ b/drivers/irqchip/irq-gic-v3-its-pci-msi.c
@@ -160,6 +160,9 @@ its_pci_msi_parse_madt(struct acpi_subtable_header *header,
        its_entry = (struct acpi_madt_generic_translator *)header;
        node_name = kasprintf(GFP_KERNEL, "ITS@0x%lx",
                              (long)its_entry->base_address);
+       if(!node_name)
+               return -ENOMEM;
+
        dom_handle = iort_find_domain_token(its_entry->translation_id);
        if (!dom_handle) {
                pr_err("%s: Unable to locate ITS domain handle\n", node_name);
diff --git a/drivers/irqchip/irq-gic-v3-its-platform-msi.c 
b/drivers/irqchip/irq-gic-v3-its-platform-msi.c
index 8881a05..b676fb4 100644
--- a/drivers/irqchip/irq-gic-v3-its-platform-msi.c
+++ b/drivers/irqchip/irq-gic-v3-its-platform-msi.c
@@ -126,6 +126,9 @@ its_pmsi_parse_madt(struct acpi_subtable_header *header,
        its_entry = (struct acpi_madt_generic_translator *)header;
        node_name = kasprintf(GFP_KERNEL, "ITS@0x%lx",
                              (long)its_entry->base_address);
+       if(!node_name)
+               return -ENOMEM;
+
        domain_handle = iort_find_domain_token(its_entry->translation_id);
        if (!domain_handle) {
                pr_err("%s: Unable to locate ITS domain handle\n", node_name);
-- 
2.7.0