1 files changed, 10 insertions, 2 deletions

diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index e7b0b385fb2b..b160ea30de0f 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -311,12 +311,19 @@ static inline int is_sp_move_ins(union mips_instruction *ip)
 static int get_frame_info(struct mips_frame_info *info)
 {
         union mips_instruction *ip = info->func;
-        int i, max_insns =
-                min(128UL, info->func_size / sizeof(union mips_instruction));
+        unsigned max_insns = info->func_size / sizeof(union mips_instruction);
+        unsigned i;
 
         info->pc_offset = -1;
         info->frame_size = 0;
 
+        if (!ip)
+                goto err;
+
+        if (max_insns == 0)
+                max_insns = 128U;       /* unknown function size */
+        max_insns = min(128U, max_insns);
+
         for (i = 0; i < max_insns; i++, ip++) {
 
                 if (is_jal_jalr_jr_ins(ip))
@@ -337,6 +344,7 @@ static int get_frame_info(struct mips_frame_info *info)
         if (info->pc_offset < 0) /* leaf */
                 return 1;
         /* prologue seems boggus... */
+err:
         return -1;
 }