diff --git a/src/defrag.c b/src/defrag.c
index 3a3aa06c8e..d42db1dfc4 100644
--- a/src/defrag.c
+++ b/src/defrag.c
@@ -297,8 +297,8 @@ Defrag4Reassemble(ThreadVars *tv, DefragTracker *tracker, Packet *p)
     rp->recursion_level = p->recursion_level;
 
     int fragmentable_offset = 0;
-    int fragmentable_len = 0;
-    int hlen = 0;
+    uint16_t fragmentable_len = 0;
+    uint16_t hlen = 0;
     int ip_hdr_offset = 0;
 
     RB_FOREACH(frag, IP_FRAGMENTS, &tracker->fragment_tree) {
@@ -326,8 +326,8 @@ Defrag4Reassemble(ThreadVars *tv, DefragTracker *tracker, Packet *p)
         else {
             int pkt_end = fragmentable_offset + frag->offset + frag->data_len;
             if (pkt_end > (int)MAX_PAYLOAD_SIZE) {
-                SCLogWarning(SC_ERR_REASSEMBLY, "Failed re-assemble "
-                        "fragmented packet, exceeds size of packet buffer.");
+                SCLogDebug("Failed re-assemble "
+                           "fragmented packet, exceeds size of packet buffer.");
                 goto error_remove_tracker;
             }
             if (PacketCopyDataOffset(rp,
@@ -336,6 +336,11 @@ Defrag4Reassemble(ThreadVars *tv, DefragTracker *tracker, Packet *p)
                     frag->data_len - frag->ltrim) == -1) {
                 goto error_remove_tracker;
             }
+            if (frag->offset > UINT16_MAX - frag->data_len) {
+                SCLogDebug("Failed re-assemble "
+                           "fragmentable_len exceeds UINT16_MAX");
+                goto error_remove_tracker;
+            }
             if (frag->offset + frag->data_len > fragmentable_len)
                 fragmentable_len = frag->offset + frag->data_len;
         }
@@ -345,11 +350,12 @@ Defrag4Reassemble(ThreadVars *tv, DefragTracker *tracker, Packet *p)
         }
     }
 
-    SCLogDebug("ip_hdr_offset %u, hlen %u, fragmentable_len %u",
-            ip_hdr_offset, hlen, fragmentable_len);
+    SCLogDebug("ip_hdr_offset %u, hlen %" PRIu16 ", fragmentable_len %" PRIu16, ip_hdr_offset, hlen,
+            fragmentable_len);
 
     rp->ip4h = (IPV4Hdr *)(GET_PKT_DATA(rp) + ip_hdr_offset);
     uint16_t old = rp->ip4h->ip_len + rp->ip4h->ip_off;
+    DEBUG_VALIDATE_BUG_ON(hlen > UINT16_MAX - fragmentable_len);
     rp->ip4h->ip_len = htons(fragmentable_len + hlen);
     rp->ip4h->ip_off = 0;
     rp->ip4h->ip_csum = FixChecksum(rp->ip4h->ip_csum,
@@ -431,9 +437,9 @@ Defrag6Reassemble(ThreadVars *tv, DefragTracker *tracker, Packet *p)
     }
     PKT_SET_SRC(rp, PKT_SRC_DEFRAG);
 
-    int unfragmentable_len = 0;
+    uint16_t unfragmentable_len = 0;
     int fragmentable_offset = 0;
-    int fragmentable_len = 0;
+    uint16_t fragmentable_len = 0;
     int ip_hdr_offset = 0;
     uint8_t next_hdr = 0;
     RB_FOREACH(frag, IP_FRAGMENTS, &tracker->fragment_tree) {
@@ -465,7 +471,10 @@ Defrag6Reassemble(ThreadVars *tv, DefragTracker *tracker, Packet *p)
 
             /* unfragmentable part is the part between the ipv6 header
              * and the frag header. */
-            unfragmentable_len = (fragmentable_offset - ip_hdr_offset) - IPV6_HEADER_LEN;
+            DEBUG_VALIDATE_BUG_ON(fragmentable_offset < ip_hdr_offset + IPV6_HEADER_LEN);
+            DEBUG_VALIDATE_BUG_ON(
+                    fragmentable_offset - ip_hdr_offset - IPV6_HEADER_LEN > UINT16_MAX);
+            unfragmentable_len = (uint16_t)(fragmentable_offset - ip_hdr_offset - IPV6_HEADER_LEN);
             if (unfragmentable_len >= fragmentable_offset)
                 goto error_remove_tracker;
         }
@@ -484,6 +493,7 @@ Defrag6Reassemble(ThreadVars *tv, DefragTracker *tracker, Packet *p)
     }
 
     rp->ip6h = (IPV6Hdr *)(GET_PKT_DATA(rp) + ip_hdr_offset);
+    DEBUG_VALIDATE_BUG_ON(unfragmentable_len > UINT16_MAX - fragmentable_len);
     rp->ip6h->s_ip6_plen = htons(fragmentable_len + unfragmentable_len);
     /* if we have no unfragmentable part, so no ext hdrs before the frag
      * header, we need to update the ipv6 headers next header field. This
diff --git a/src/output-tx.c b/src/output-tx.c
index e51afc6d35..4bc60f90e4 100644
--- a/src/output-tx.c
+++ b/src/output-tx.c
@@ -141,8 +141,8 @@ static inline void OutputTxLogFiles(ThreadVars *tv, OutputFileLoggerThreadData *
         const uint64_t tx_id, AppLayerTxData *txd, const bool tx_complete, const bool ts_ready,
         const bool tc_ready, const bool ts_eof, const bool tc_eof, const bool eof)
 {
-    int packet_dir;
-    int opposing_dir;
+    uint8_t packet_dir;
+    uint8_t opposing_dir;
     bool packet_dir_ready;
     const bool opposing_dir_ready = eof;
     bool opposing_tx_ready;
diff --git a/src/source-af-packet.c b/src/source-af-packet.c
index c94b4a6b83..b0445eef23 100644
--- a/src/source-af-packet.c
+++ b/src/source-af-packet.c
@@ -948,7 +948,7 @@ static inline int AFPParsePacketV3(AFPThreadVars *ptv, struct tpacket_block_desc
             (ppd->tp_status & TP_STATUS_VLAN_VALID || ppd->hv1.tp_vlan_tci)) {
         p->vlan_id[0] = ppd->hv1.tp_vlan_tci & 0x0fff;
         p->vlan_idx = 1;
-        p->afp_v.vlan_tci = ppd->hv1.tp_vlan_tci;
+        p->afp_v.vlan_tci = (uint16_t)ppd->hv1.tp_vlan_tci;
     }
 
     (void)PacketSetData(p, (unsigned char *)ppd + ppd->tp_mac, ppd->tp_snaplen);
@@ -1116,7 +1116,7 @@ static void AFPCloseSocket(AFPThreadVars *ptv)
     }
 }
 
-static void AFPSwitchState(AFPThreadVars *ptv, int state)
+static void AFPSwitchState(AFPThreadVars *ptv, uint8_t state)
 {
     ptv->afp_state = state;
     ptv->down_count = 0;
@@ -2073,7 +2073,10 @@ TmEcode AFPSetBPFFilter(AFPThreadVars *ptv)
         return TM_ECODE_FAILED;
     }
 
-    fcode.len    = filter.bf_len;
+    if (filter.bf_len > USHRT_MAX) {
+        return TM_ECODE_FAILED;
+    }
+    fcode.len = (unsigned short)filter.bf_len;
     fcode.filter = (struct sock_filter*)filter.bf_insns;
 
     rc = setsockopt(ptv->socket, SOL_SOCKET, SO_ATTACH_FILTER, &fcode, sizeof(fcode));
diff --git a/src/source-af-packet.h b/src/source-af-packet.h
index de25ff2442..d91d0cb252 100644
--- a/src/source-af-packet.h
+++ b/src/source-af-packet.h
@@ -97,7 +97,7 @@ typedef struct AFPIfaceConfig_
     int promisc;
     /* misc use flags including ring mode */
     unsigned int flags;
-    int copy_mode;
+    uint8_t copy_mode;
     ChecksumValidationMode checksum_mode;
     const char *bpf_filter;
     const char *ebpf_lb_file;