2 files changed, 13 insertions, 3 deletions
diff --git a/ext/digest/sha1/depend b/ext/digest/sha1/depend
index 827b8a0852..e6bd9d8f73 100644
--- a/ext/digest/sha1/depend
+++ b/ext/digest/sha1/depend
@@ -131,6 +131,7 @@ sha1.o: $(hdrdir)/ruby/internal/intern/re.h
 sha1.o: $(hdrdir)/ruby/internal/intern/ruby.h
 sha1.o: $(hdrdir)/ruby/internal/intern/select.h
 sha1.o: $(hdrdir)/ruby/internal/intern/select/largesize.h
+sha1.o: $(hdrdir)/ruby/internal/intern/set.h
 sha1.o: $(hdrdir)/ruby/internal/intern/signal.h
 sha1.o: $(hdrdir)/ruby/internal/intern/sprintf.h
 sha1.o: $(hdrdir)/ruby/internal/intern/string.h
@@ -293,6 +294,7 @@ sha1init.o: $(hdrdir)/ruby/internal/intern/re.h
 sha1init.o: $(hdrdir)/ruby/internal/intern/ruby.h
 sha1init.o: $(hdrdir)/ruby/internal/intern/select.h
 sha1init.o: $(hdrdir)/ruby/internal/intern/select/largesize.h
+sha1init.o: $(hdrdir)/ruby/internal/intern/set.h
 sha1init.o: $(hdrdir)/ruby/internal/intern/signal.h
 sha1init.o: $(hdrdir)/ruby/internal/intern/sprintf.h
 sha1init.o: $(hdrdir)/ruby/internal/intern/string.h
diff --git a/ext/digest/sha1/sha1.c b/ext/digest/sha1/sha1.c
index 5311227549..003c87d224 100644
--- a/ext/digest/sha1/sha1.c
+++ b/ext/digest/sha1/sha1.c
@@ -220,20 +220,28 @@ int SHA1_Init(SHA1_CTX *context)
  */
 void SHA1_Update(SHA1_CTX *context, const uint8_t *data, size_t len)
 {
-    uint32_t i, j;
+    size_t i;
+    uint32_t j;
 
     _DIAGASSERT(context != 0);
     _DIAGASSERT(data != 0);
 
     j = context->count[0];
     if ((context->count[0] += len << 3) < j)
-	context->count[1] += (len>>29)+1;
+	context->count[1]++;
+    context->count[1] += (uint32_t)(len >> 29);
     j = (j >> 3) & 63;
     if ((j + len) > 63) {
 	(void)memcpy(&context->buffer[j], data, (i = 64-j));
 	SHA1_Transform(context->state, context->buffer);
-	for ( ; i + 63 < len; i += 64)
+	for ( ; i + 63 < len; i += 64) {
+	    RB_DIGEST_WARNING_PUSH();
+#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ >= 11
+	    RB_DIGEST_WARNING_IGNORED(-Wstringop-overread);
+#endif
 	    SHA1_Transform(context->state, &data[i]);
+	    RB_DIGEST_WARNING_POP();
+	}
 	j = 0;
     } else {
 	i = 0;