diff --git a/include/o3tl/safeint.hxx b/include/o3tl/safeint.hxx
index 52b42e28a653..a57f5f269d09 100644
--- a/include/o3tl/safeint.hxx
+++ b/include/o3tl/safeint.hxx
@@ -36,6 +36,7 @@ template <typename T> inline constexpr T saturating_add(T a, T b)
             return std::numeric_limits<T>::max();
         }
     } else {
+        // coverity[dead_error_line] - suppress warning for template
         if (a >= std::numeric_limits<T>::min() - b) {
             return a + b;
         } else {
diff --git a/include/o3tl/unit_conversion.hxx b/include/o3tl/unit_conversion.hxx
index 5f78d2ef32c6..4aba0c988613 100644
--- a/include/o3tl/unit_conversion.hxx
+++ b/include/o3tl/unit_conversion.hxx
@@ -73,6 +73,7 @@ constexpr sal_Int64 MulDiv(I n, sal_Int64 m, sal_Int64 d)
 {
     assert(m > 0 && d > 0);
     assert(isBetween(n, (SAL_MIN_INT64 + d / 2) / m, (SAL_MAX_INT64 - d / 2) / m));
+    // coverity[dead_error_line] - suppress warning for template
     return (n >= 0 ? (n * m + d / 2) : (n * m - d / 2)) / d;
 }
 template <typename F, std::enable_if_t<std::is_floating_point_v<F>, int> = 0>
diff --git a/sal/osl/unx/file.cxx b/sal/osl/unx/file.cxx
index a07c08020e36..7678b4813409 100644
--- a/sal/osl/unx/file.cxx
+++ b/sal/osl/unx/file.cxx
@@ -1428,7 +1428,10 @@ oslFileError SAL_CALL osl_mapFile(
     *ppAddr = nullptr;
 
     if (uLength > SAL_MAX_SIZE)
+    {
+        // coverity[dead_error_line] - suppress warning, 32bit platforms still
         return osl_File_E_OVERFLOW;
+    }
 
     size_t const nLength = sal::static_int_cast< size_t >(uLength);
 
@@ -1504,7 +1507,10 @@ static oslFileError unmapFile(void* pAddr, sal_uInt64 uLength)
         return osl_File_E_INVAL;
 
     if (uLength > SAL_MAX_SIZE)
+    {
+        // coverity[dead_error_line] - suppress warning, 32bit platforms still
         return osl_File_E_OVERFLOW;
+    }
 
     size_t const nLength = sal::static_int_cast< size_t >(uLength);
 
diff --git a/tools/source/generic/config.cxx b/tools/source/generic/config.cxx
index 9fa470b854ba..07cd81bf1382 100644
--- a/tools/source/generic/config.cxx
+++ b/tools/source/generic/config.cxx
@@ -103,6 +103,7 @@ static std::unique_ptr<sal_uInt8[]> ImplSysReadConfig( const OUString& rFileName
         if( aFile.getSize( nPos ) == ::osl::FileBase::E_None )
         {
             if (nPos > SAL_MAX_SIZE) {
+                // coverity[dead_error_line] - suppress warning, 32bit platforms still
                 aFile.close();
                 return nullptr;
             }