Introduce memory allocation return value check

In pci_std_swizzle_irq_map(), check if the memory allocation
of interrupt-mask returns a valid pointer before using it.

Fixes Coverity defect#97854.

Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Cc: Samuel Mendoza-Jonas <sam.mj@au1.ibm.com>
Cc: Gavin Shan <gwshan@linux.vnet.ibm.com>
[stewart@linux.vnet.ibm.com: change to prerror() rather than prlog(DEBUG)]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/core/pci.c b/core/pci.c
index 7083ea1..2d5906a 100644
--- a/core/pci.c
+++ b/core/pci.c
@@ -1087,6 +1087,10 @@ void pci_std_swizzle_irq_map(struct dt_node *np,
 	}
 	map_size = esize * edevcount * 4 * sizeof(uint32_t);
 	map = p = zalloc(map_size);
+	if (!map) {
+		prerror("Failed to allocate interrupt-map-mask !\n");
+		return;
+	}
 
 	for (dev = 0; dev < edevcount; dev++) {
 		for (irq = 0; irq < 4; irq++) {