mtd: physmap_of: fix null pointer deference when kzalloc returns null
static analysis by smatch caught the following error:
drivers/mtd/maps/physmap_of.c:135 of_get_probes()
error: potential null dereference 'res'. (kzalloc returns null)
Check for failed kzalloc and return -ENOMEM in of_flash_probe if
this occurs.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c
index 774b32f..3e614e9 100644
--- a/drivers/mtd/maps/physmap_of.c
+++ b/drivers/mtd/maps/physmap_of.c
@@ -130,6 +130,8 @@
count++;
res = kzalloc((count + 1)*sizeof(*res), GFP_KERNEL);
+ if (!res)
+ return NULL;
count = 0;
while (cplen > 0) {
res[count] = cp;
@@ -311,6 +313,10 @@
ppdata.of_node = dp;
part_probe_types = of_get_probes(dp);
+ if (!part_probe_types) {
+ err = -ENOMEM;
+ goto err_out;
+ }
mtd_device_parse_register(info->cmtd, part_probe_types, &ppdata,
NULL, 0);
of_free_probes(part_probe_types);