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[PULL,1/1] hw/mips_itu: fix off-by-one reported by Coverity

Message ID 1460108908-12747-2-git-send-email-leon.alrae@imgtec.com (mailing list archive)
State New, archived
Headers show

Commit Message

Leon Alrae April 8, 2016, 9:48 a.m. UTC 
Fix off-by-one error in ITC Tag read.

Remove the switch as we just want to check if index is in valid range
rather than test against list of values.

Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
---
 hw/misc/mips_itu.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)
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Patch

diff --git a/hw/misc/mips_itu.c b/hw/misc/mips_itu.c
index 8461d23..da54550 100644
--- a/hw/misc/mips_itu.c
+++ b/hw/misc/mips_itu.c
@@ -66,18 +66,13 @@  static uint64_t itc_tag_read(void *opaque, hwaddr addr, unsigned size)
 {
     MIPSITUState *tag = (MIPSITUState *)opaque;
     uint64_t index = addr >> 3;
-    uint64_t ret = 0;
 
-    switch (index) {
-    case 0 ... ITC_ADDRESSMAP_NUM:
-        ret = tag->ITCAddressMap[index];
-        break;
-    default:
+    if (index >= ITC_ADDRESSMAP_NUM) {
         qemu_log_mask(LOG_GUEST_ERROR, "Read 0x%" PRIx64 "\n", addr);
-        break;
+        return 0;
     }
 
-    return ret;
+    return tag->ITCAddressMap[index];
 }
 
 static void itc_reconfigure(MIPSITUState *tag)