diff --git a/apps/engine.c b/apps/engine.c
index da1d918..1ead525 100644
--- a/apps/engine.c
+++ b/apps/engine.c
@@ -311,6 +311,7 @@
             break;
         case OPT_TT:
             test_avail_noise++;
+            /* fall thru */
         case OPT_T:
             test_avail++;
             break;
diff --git a/apps/verify.c b/apps/verify.c
index c31695c..960d4eb 100644
--- a/apps/verify.c
+++ b/apps/verify.c
@@ -287,6 +287,7 @@
         switch (cert_error) {
         case X509_V_ERR_NO_EXPLICIT_POLICY:
             policies_print(ctx);
+            /* fall thru */
         case X509_V_ERR_CERT_HAS_EXPIRED:
 
             /*
diff --git a/crypto/bf/bf_locl.h b/crypto/bf/bf_locl.h
index 7e5f92c..b1a415e 100644
--- a/crypto/bf/bf_locl.h
+++ b/crypto/bf/bf_locl.h
@@ -17,12 +17,19 @@
                         l1=l2=0; \
                         switch (n) { \
                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
+                        /* fall thru */                              \
                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
+                        /* fall thru */                              \
                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
+                        /* fall thru */                              \
                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
+                        /* fall thru */                              \
                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
+                        /* fall thru */                              \
                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
+                        /* fall thru */                              \
                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
+                        /* fall thru */                              \
                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
                                 } \
                         }
@@ -32,12 +39,19 @@
                         c+=n; \
                         switch (n) { \
                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
+                        /* fall thru */                                    \
                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
+                        /* fall thru */                                    \
                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
+                        /* fall thru */                                    \
                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
+                        /* fall thru */                                    \
                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
+                        /* fall thru */                                    \
                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
+                        /* fall thru */                                    \
                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
+                        /* fall thru */                                    \
                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
                                 } \
                         }
diff --git a/crypto/bio/b_print.c b/crypto/bio/b_print.c
index af05c35..a7741f0 100644
--- a/crypto/bio/b_print.c
+++ b/crypto/bio/b_print.c
@@ -270,6 +270,7 @@
                 break;
             case 'E':
                 flags |= DP_F_UP;
+                /* fall thru */
             case 'e':
                 if (cflags == DP_C_LDOUBLE)
                     fvalue = va_arg(args, LDOUBLE);
@@ -281,6 +282,7 @@
                 break;
             case 'G':
                 flags |= DP_F_UP;
+                /* fall thru */
             case 'g':
                 if (cflags == DP_C_LDOUBLE)
                     fvalue = va_arg(args, LDOUBLE);
diff --git a/crypto/bio/bss_fd.c b/crypto/bio/bss_fd.c
index a02c65d..49976e7 100644
--- a/crypto/bio/bss_fd.c
+++ b/crypto/bio/bss_fd.c
@@ -148,6 +148,7 @@
     switch (cmd) {
     case BIO_CTRL_RESET:
         num = 0;
+        /* fall thru */
     case BIO_C_FILE_SEEK:
         ret = (long)UP_lseek(b->num, num, 0);
         break;
diff --git a/crypto/bn/bn_mul.c b/crypto/bn/bn_mul.c
index 99402fc..c72fad2 100644
--- a/crypto/bn/bn_mul.c
+++ b/crypto/bn/bn_mul.c
@@ -115,10 +115,12 @@
                     r[1] = a[1];
                     if (--dl <= 0)
                         break;
+                    /* fall thru */
                 case 2:
                     r[2] = a[2];
                     if (--dl <= 0)
                         break;
+                    /* fall thru */
                 case 3:
                     r[3] = a[3];
                     if (--dl <= 0)
diff --git a/crypto/cast/cast_lcl.h b/crypto/cast/cast_lcl.h
index 504232a..e8cf322 100644
--- a/crypto/cast/cast_lcl.h
+++ b/crypto/cast/cast_lcl.h
@@ -64,12 +64,19 @@
                         l1=l2=0; \
                         switch (n) { \
                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
+                        /* fall thru */                              \
                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
+                        /* fall thru */                              \
                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
+                        /* fall thru */                              \
                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
+                        /* fall thru */                              \
                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
+                        /* fall thru */                              \
                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
+                        /* fall thru */                              \
                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
+                        /* fall thru */                              \
                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
                                 } \
                         }
@@ -79,12 +86,19 @@
                         c+=n; \
                         switch (n) { \
                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
+                        /* fall thru */                                    \
                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
+                        /* fall thru */                                    \
                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
+                        /* fall thru */                                    \
                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
+                        /* fall thru */                                    \
                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
+                        /* fall thru */                                    \
                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
+                        /* fall thru */                                    \
                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
+                        /* fall thru */                                    \
                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
                                 } \
                         }
diff --git a/crypto/cms/cms_asn1.c b/crypto/cms/cms_asn1.c
index 8b32abe..993ea6b 100644
--- a/crypto/cms/cms_asn1.c
+++ b/crypto/cms/cms_asn1.c
@@ -292,6 +292,7 @@
     case ASN1_OP_STREAM_PRE:
         if (CMS_stream(&sarg->boundary, cms) <= 0)
             return 0;
+        /* fall thru */
     case ASN1_OP_DETACHED_PRE:
         sarg->ndef_bio = CMS_dataInit(cms, sarg->out);
         if (!sarg->ndef_bio)
diff --git a/crypto/des/des_locl.h b/crypto/des/des_locl.h
index 3c08ce8..f401e6f 100644
--- a/crypto/des/des_locl.h
+++ b/crypto/des/des_locl.h
@@ -37,13 +37,20 @@
                         l1=l2=0; \
                         switch (n) { \
                         case 8: l2 =((DES_LONG)(*(--(c))))<<24L; \
+                        /* fall thru */                          \
                         case 7: l2|=((DES_LONG)(*(--(c))))<<16L; \
+                        /* fall thru */                          \
                         case 6: l2|=((DES_LONG)(*(--(c))))<< 8L; \
-                        case 5: l2|=((DES_LONG)(*(--(c))));     \
+                        /* fall thru */                          \
+                        case 5: l2|=((DES_LONG)(*(--(c))));      \
+                        /* fall thru */                          \
                         case 4: l1 =((DES_LONG)(*(--(c))))<<24L; \
+                        /* fall thru */                          \
                         case 3: l1|=((DES_LONG)(*(--(c))))<<16L; \
+                        /* fall thru */                          \
                         case 2: l1|=((DES_LONG)(*(--(c))))<< 8L; \
-                        case 1: l1|=((DES_LONG)(*(--(c))));     \
+                        /* fall thru */                          \
+                        case 1: l1|=((DES_LONG)(*(--(c))));      \
                                 } \
                         }
 
@@ -72,12 +79,19 @@
                         c+=n; \
                         switch (n) { \
                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
+                        /* fall thru */                                     \
                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
+                        /* fall thru */                                     \
                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
+                        /* fall thru */                                     \
                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
+                        /* fall thru */                                     \
                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
+                        /* fall thru */                                     \
                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
+                        /* fall thru */                                     \
                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
+                        /* fall thru */                                     \
                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
                                 } \
                         }
diff --git a/crypto/evp/e_aes.c b/crypto/evp/e_aes.c
index 451d32d..802b1d8 100644
--- a/crypto/evp/e_aes.c
+++ b/crypto/evp/e_aes.c
@@ -1978,6 +1978,7 @@
 
     case EVP_CTRL_AEAD_SET_IVLEN:
         arg = 15 - arg;
+        /* fall thru */
     case EVP_CTRL_CCM_SET_L:
         if (arg < 2 || arg > 8)
             return 0;
diff --git a/crypto/idea/idea_lcl.h b/crypto/idea/idea_lcl.h
index f227d0d..825d000 100644
--- a/crypto/idea/idea_lcl.h
+++ b/crypto/idea/idea_lcl.h
@@ -38,12 +38,19 @@
                         l1=l2=0; \
                         switch (n) { \
                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
+                        /* fall thru */                              \
                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
+                        /* fall thru */                              \
                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
+                        /* fall thru */                              \
                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
+                        /* fall thru */                              \
                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
+                        /* fall thru */                              \
                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
+                        /* fall thru */                              \
                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
+                        /* fall thru */                              \
                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
                                 } \
                         }
@@ -53,12 +60,19 @@
                         c+=n; \
                         switch (n) { \
                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
+                        /* fall thru */                                    \
                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
+                        /* fall thru */                                    \
                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
+                        /* fall thru */                                    \
                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
+                        /* fall thru */                                    \
                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
+                        /* fall thru */                                    \
                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
+                        /* fall thru */                                    \
                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
+                        /* fall thru */                                    \
                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
                                 } \
                         }
diff --git a/crypto/ocsp/ocsp_ht.c b/crypto/ocsp/ocsp_ht.c
index 680edfa..d8796ca 100644
--- a/crypto/ocsp/ocsp_ht.c
+++ b/crypto/ocsp/ocsp_ht.c
@@ -298,10 +298,12 @@
         }
         rctx->state = OHS_ASN1_WRITE_INIT;
 
+        /* fall thru */
     case OHS_ASN1_WRITE_INIT:
         rctx->asn1_len = BIO_get_mem_data(rctx->mem, NULL);
         rctx->state = OHS_ASN1_WRITE;
 
+        /* fall thru */
     case OHS_ASN1_WRITE:
         n = BIO_get_mem_data(rctx->mem, &p);
 
@@ -323,6 +325,7 @@
 
         (void)BIO_reset(rctx->mem);
 
+        /* fall thru */
     case OHS_ASN1_FLUSH:
 
         i = BIO_flush(rctx->io);
diff --git a/crypto/pem/pvkfmt.c b/crypto/pem/pvkfmt.c
index 248704e..ebd6913 100644
--- a/crypto/pem/pvkfmt.c
+++ b/crypto/pem/pvkfmt.c
@@ -120,6 +120,7 @@
 
     case MS_DSS1MAGIC:
         *pisdss = 1;
+        /* fall thru */
     case MS_RSA1MAGIC:
         if (*pispub == 0) {
             PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
@@ -129,6 +130,7 @@
 
     case MS_DSS2MAGIC:
         *pisdss = 1;
+        /* fall thru */
     case MS_RSA2MAGIC:
         if (*pispub == 1) {
             PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
diff --git a/crypto/pkcs7/pk7_asn1.c b/crypto/pkcs7/pk7_asn1.c
index 315e1b8..cd9fb4f 100644
--- a/crypto/pkcs7/pk7_asn1.c
+++ b/crypto/pkcs7/pk7_asn1.c
@@ -40,6 +40,7 @@
     case ASN1_OP_STREAM_PRE:
         if (PKCS7_stream(&sarg->boundary, *pp7) <= 0)
             return 0;
+        /* fall thru */
     case ASN1_OP_DETACHED_PRE:
         sarg->ndef_bio = PKCS7_dataInit(*pp7, sarg->out);
         if (!sarg->ndef_bio)
diff --git a/crypto/rc2/rc2_locl.h b/crypto/rc2/rc2_locl.h
index a9a57d6..e4dad94 100644
--- a/crypto/rc2/rc2_locl.h
+++ b/crypto/rc2/rc2_locl.h
@@ -20,13 +20,20 @@
                         l1=l2=0; \
                         switch (n) { \
                         case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
+                        /* fall thru */                               \
                         case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
+                        /* fall thru */                               \
                         case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
-                        case 5: l2|=((unsigned long)(*(--(c))));     \
+                        /* fall thru */                               \
+                        case 5: l2|=((unsigned long)(*(--(c))));      \
+                        /* fall thru */                               \
                         case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
+                        /* fall thru */                               \
                         case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
+                        /* fall thru */                               \
                         case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
-                        case 1: l1|=((unsigned long)(*(--(c))));     \
+                        /* fall thru */                               \
+                        case 1: l1|=((unsigned long)(*(--(c))));      \
                                 } \
                         }
 
@@ -42,12 +49,19 @@
                         c+=n; \
                         switch (n) { \
                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
+                        /* fall thru */                                     \
                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
+                        /* fall thru */                                     \
                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
+                        /* fall thru */                                     \
                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
+                        /* fall thru */                                     \
                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
+                        /* fall thru */                                     \
                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
+                        /* fall thru */                                     \
                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
+                        /* fall thru */                                     \
                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
                                 } \
                         }
@@ -58,12 +72,19 @@
                         l1=l2=0; \
                         switch (n) { \
                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
+                        /* fall thru */                              \
                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
+                        /* fall thru */                              \
                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
+                        /* fall thru */                              \
                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
+                        /* fall thru */                              \
                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
+                        /* fall thru */                              \
                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
+                        /* fall thru */                              \
                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
+                        /* fall thru */                              \
                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
                                 } \
                         }
@@ -73,12 +94,19 @@
                         c+=n; \
                         switch (n) { \
                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
+                        /* fall thru */                                    \
                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
+                        /* fall thru */                                    \
                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
+                        /* fall thru */                                    \
                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
+                        /* fall thru */                                    \
                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
+                        /* fall thru */                                    \
                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
+                        /* fall thru */                                    \
                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
+                        /* fall thru */                                    \
                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
                                 } \
                         }
diff --git a/crypto/rc5/rc5_locl.h b/crypto/rc5/rc5_locl.h
index 33a709b..41130fe 100644
--- a/crypto/rc5/rc5_locl.h
+++ b/crypto/rc5/rc5_locl.h
@@ -22,13 +22,20 @@
                         l1=l2=0; \
                         switch (n) { \
                         case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
+                        /* fall thru */                               \
                         case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
+                        /* fall thru */                               \
                         case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
-                        case 5: l2|=((unsigned long)(*(--(c))));     \
+                        /* fall thru */                               \
+                        case 5: l2|=((unsigned long)(*(--(c))));      \
+                        /* fall thru */                               \
                         case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
+                        /* fall thru */                               \
                         case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
+                        /* fall thru */                               \
                         case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
-                        case 1: l1|=((unsigned long)(*(--(c))));     \
+                        /* fall thru */                               \
+                        case 1: l1|=((unsigned long)(*(--(c))));      \
                                 } \
                         }
 
@@ -44,12 +51,19 @@
                         c+=n; \
                         switch (n) { \
                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
+                        /* fall thru */                                     \
                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
+                        /* fall thru */                                     \
                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
+                        /* fall thru */                                     \
                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
+                        /* fall thru */                                     \
                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
+                        /* fall thru */                                     \
                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
+                        /* fall thru */                                     \
                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
+                        /* fall thru */                                     \
                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
                                 } \
                         }
@@ -60,12 +74,19 @@
                         l1=l2=0; \
                         switch (n) { \
                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
+                        /* fall thru */                              \
                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
+                        /* fall thru */                              \
                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
+                        /* fall thru */                              \
                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
+                        /* fall thru */                              \
                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
+                        /* fall thru */                              \
                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
+                        /* fall thru */                              \
                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
+                        /* fall thru */                              \
                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
                                 } \
                         }
@@ -75,12 +96,19 @@
                         c+=n; \
                         switch (n) { \
                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
+                        /* fall thru */                                    \
                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
+                        /* fall thru */                                    \
                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
+                        /* fall thru */                                    \
                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
+                        /* fall thru */                                    \
                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
+                        /* fall thru */                                    \
                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
+                        /* fall thru */                                    \
                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
+                        /* fall thru */                                    \
                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
                                 } \
                         }
diff --git a/crypto/siphash/siphash.c b/crypto/siphash/siphash.c
index 4bf2382..b00d588 100644
--- a/crypto/siphash/siphash.c
+++ b/crypto/siphash/siphash.c
@@ -191,16 +191,22 @@
     switch (ctx->len) {
     case 7:
         b |= ((uint64_t)ctx->leavings[6]) << 48;
+        /* fall thru */
     case 6:
         b |= ((uint64_t)ctx->leavings[5]) << 40;
+        /* fall thru */
     case 5:
         b |= ((uint64_t)ctx->leavings[4]) << 32;
+        /* fall thru */
     case 4:
         b |= ((uint64_t)ctx->leavings[3]) << 24;
+        /* fall thru */
     case 3:
         b |= ((uint64_t)ctx->leavings[2]) << 16;
+        /* fall thru */
     case 2:
         b |= ((uint64_t)ctx->leavings[1]) <<  8;
+        /* fall thru */
     case 1:
         b |= ((uint64_t)ctx->leavings[0]);
     case 0:
diff --git a/ssl/statem/statem_clnt.c b/ssl/statem/statem_clnt.c
index b9b8da1..e6a0b35 100644
--- a/ssl/statem/statem_clnt.c
+++ b/ssl/statem/statem_clnt.c
@@ -517,7 +517,8 @@
              */
             return WRITE_TRAN_FINISHED;
         }
-        /* Renegotiation - fall through */
+        /* Renegotiation */
+        /* fall thru */
     case TLS_ST_BEFORE:
         st->hand_state = TLS_ST_CW_CLNT_HELLO;
         return WRITE_TRAN_CONTINUE;
diff --git a/ssl/statem/statem_lib.c b/ssl/statem/statem_lib.c
index d37cbc3..5c00b0a 100644
--- a/ssl/statem/statem_lib.c
+++ b/ssl/statem/statem_lib.c
@@ -1616,6 +1616,7 @@
          * Fall through if we are TLSv1.3 already (this means we must be after
          * a HelloRetryRequest
          */
+        /* fall thru */
     case TLS_ANY_VERSION:
         table = tls_version_table;
         break;
diff --git a/test/sslapitest.c b/test/sslapitest.c
index 1522613..a2424cf 100644
--- a/test/sslapitest.c
+++ b/test/sslapitest.c
@@ -1528,7 +1528,7 @@
     SSL_CTX *cctx = NULL, *sctx = NULL;
     SSL *clientssl = NULL, *serverssl = NULL;
     int testresult = 0;
-    SSL_SESSION *sess;
+    SSL_SESSION *sess = NULL;
     unsigned char buf[20];
     size_t readbytes, written;
 
@@ -1588,7 +1588,7 @@
     SSL_CTX *cctx = NULL, *sctx = NULL;
     SSL *clientssl = NULL, *serverssl = NULL;
     int testresult = 0;
-    SSL_SESSION *sess;
+    SSL_SESSION *sess = NULL;
     unsigned char buf[20];
     size_t readbytes, written;
 
@@ -1654,7 +1654,7 @@
     SSL_CTX *cctx = NULL, *sctx = NULL;
     SSL *clientssl = NULL, *serverssl = NULL;
     int testresult = 0;
-    SSL_SESSION *sess;
+    SSL_SESSION *sess = NULL;
     unsigned char buf[20];
     size_t readbytes, written;