math32: Integer overflow occurs in arithmetic on constant operands

https://coverity.pt.xiaomi.com/#/project-view/10098/10010?selectedIssue=1266083 Signed-off-by: zhangyuan29 <zhangyuan29@xiaomi.com> Signed-off-by: ligd <liguiding1@xiaomi.com>
apache · Sep 9, 2024 · b190a92 · b190a92
1 parent eadb155
commit b190a92
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/include/nuttx/lib/math32.h b/include/nuttx/lib/math32.h
@@ -133,9 +133,9 @@ extern "C"
 #    define __umul64_const(res, m, n, bias) \
       do \
         { \
-          uint32_t __m_lo = (m); \
+          uint32_t __m_lo = (m) & 0xffffffff; \
           uint32_t __m_hi = (m) >> 32; \
-          uint32_t __n_lo = (n); \
+          uint32_t __n_lo = (n) & 0xffffffff; \
           uint32_t __n_hi = (n) >> 32; \
           uint32_t __res_lo; \
           uint32_t __res_hi; \