1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 52dba6a01423..d385bb824772 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -95,9 +95,9 @@ struct device_node *of_irq_find_parent(struct device_node *child)
 int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq)
 {
         struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL;
-        __be32 initial_match_array[8];
+        __be32 initial_match_array[MAX_PHANDLE_ARGS];
         const __be32 *match_array = initial_match_array;
-        const __be32 *tmp, *imap, *imask, dummy_imask[] = { ~0, ~0, ~0, ~0, ~0 };
+        const __be32 *tmp, *imap, *imask, dummy_imask[] = { [0 ... MAX_PHANDLE_ARGS] = ~0 };
         u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0;
         int imaplen, match, i;
 
@@ -147,6 +147,10 @@ int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq)
 
         pr_debug(" -> addrsize=%d\n", addrsize);
 
+        /* Range check so that the temporary buffer doesn't overflow */
+        if (WARN_ON(addrsize + intsize > MAX_PHANDLE_ARGS))
+                goto fail;
+
         /* Precalculate the match array - this simplifies match loop */
         for (i = 0; i < addrsize; i++)
                 initial_match_array[i] = addr ? addr[i] : 0;
@@ -229,6 +233,8 @@ int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq)
                             newintsize, newaddrsize);
 
                         /* Check for malformed properties */
+                        if (WARN_ON(newaddrsize + newintsize > MAX_PHANDLE_ARGS))
+                                goto fail;
                         if (imaplen < (newaddrsize + newintsize))
                                 goto fail;