diff --git a/configure b/configure
index e6077a1917..d4635a4ae6 100755
--- a/configure
+++ b/configure
@@ -3108,6 +3108,10 @@ case "$arch" in
         check_64bit ppc ppc64 'sizeof(void *) > 4'
         spic=$shared
     ;;
+    s390)
+        check_64bit s390 s390x 'sizeof(void *) > 4'
+        spic=$shared
+    ;;
     sparc)
         check_64bit sparc sparc64 'sizeof(void *) > 4'
         spic=$shared
diff --git a/libavcodec/ituh263dec.c b/libavcodec/ituh263dec.c
index 44b13aa5ed..cf57059740 100644
--- a/libavcodec/ituh263dec.c
+++ b/libavcodec/ituh263dec.c
@@ -757,6 +757,8 @@ int ff_h263_decode_mb(MpegEncContext *s,
         }
 
         if(IS_DIRECT(mb_type)){
+            if (!s->pp_time)
+                return AVERROR_INVALIDDATA;
             s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
             mb_type |= ff_mpeg4_set_direct_mv(s, 0, 0);
         }else{
diff --git a/libavcodec/lagarith.c b/libavcodec/lagarith.c
index 486e326a0f..e1fa808e34 100644
--- a/libavcodec/lagarith.c
+++ b/libavcodec/lagarith.c
@@ -53,6 +53,7 @@ typedef struct LagarithContext {
     int zeros;                  /**< number of consecutive zero bytes encountered */
     int zeros_rem;              /**< number of zero bytes remaining to output */
     uint8_t *rgb_planes;
+    int      rgb_planes_allocated;
     int rgb_stride;
 } LagarithContext;
 
@@ -567,13 +568,12 @@ static int lag_decode_frame(AVCodecContext *avctx,
         offs[1] = offset_gu;
         offs[2] = offset_ry;
 
+        l->rgb_stride = FFALIGN(avctx->width, 16);
+        av_fast_malloc(&l->rgb_planes, &l->rgb_planes_allocated,
+                       l->rgb_stride * avctx->height * planes + 1);
         if (!l->rgb_planes) {
-            l->rgb_stride = FFALIGN(avctx->width, 16);
-            l->rgb_planes = av_malloc(l->rgb_stride * avctx->height * 4 + 16);
-            if (!l->rgb_planes) {
-                av_log(avctx, AV_LOG_ERROR, "cannot allocate temporary buffer\n");
-                return AVERROR(ENOMEM);
-            }
+            av_log(avctx, AV_LOG_ERROR, "cannot allocate temporary buffer\n");
+            return AVERROR(ENOMEM);
         }
         for (i = 0; i < planes; i++)
             srcs[i] = l->rgb_planes + (i + 1) * l->rgb_stride * avctx->height - l->rgb_stride;
diff --git a/libavcodec/shorten.c b/libavcodec/shorten.c
index eef322a2a2..67fce3232c 100644
--- a/libavcodec/shorten.c
+++ b/libavcodec/shorten.c
@@ -437,7 +437,7 @@ static int shorten_decode_frame(AVCodecContext *avctx, void *data,
         void *tmp_ptr;
         s->max_framesize = 8192; // should hopefully be enough for the first header
         tmp_ptr = av_fast_realloc(s->bitstream, &s->allocated_bitstream_size,
-                                  s->max_framesize);
+                                  s->max_framesize + FF_INPUT_BUFFER_PADDING_SIZE);
         if (!tmp_ptr) {
             av_log(avctx, AV_LOG_ERROR, "error allocating bitstream buffer\n");
             return AVERROR(ENOMEM);
diff --git a/libavcodec/truemotion1.c b/libavcodec/truemotion1.c
index b297bd97d0..dc30b6e8b3 100644
--- a/libavcodec/truemotion1.c
+++ b/libavcodec/truemotion1.c
@@ -322,6 +322,11 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
         return -1;
     }
 
+    if (header.header_size + 1 > s->size) {
+        av_log(s->avctx, AV_LOG_ERROR, "Input packet too small.\n");
+        return AVERROR_INVALIDDATA;
+    }
+
     /* unscramble the header bytes with a XOR operation */
     for (i = 1; i < header.header_size; i++)
         header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1];
diff --git a/libavutil/samplefmt.c b/libavutil/samplefmt.c
index 6f762df9b4..d25cc98fe7 100644
--- a/libavutil/samplefmt.c
+++ b/libavutil/samplefmt.c
@@ -135,6 +135,8 @@ int av_samples_get_buffer_size(int *linesize, int nb_channels, int nb_samples,
 
     /* auto-select alignment if not specified */
     if (!align) {
+        if (nb_samples > INT_MAX - 31)
+            return AVERROR(EINVAL);
         align = 1;
         nb_samples = FFALIGN(nb_samples, 32);
     }