diff --git a/libavcodec/alac.c b/libavcodec/alac.c
index 83e0d810e6..0e6c549dd5 100644
--- a/libavcodec/alac.c
+++ b/libavcodec/alac.c
@@ -636,10 +636,9 @@ static av_cold int alac_decode_init(AVCodecContext * avctx)
     alac->avctx = avctx;
 
     /* initialize from the extradata */
-    if (alac->avctx->extradata_size != ALAC_EXTRADATA_SIZE) {
-        av_log(avctx, AV_LOG_ERROR, "alac: expected %d extradata bytes\n",
-            ALAC_EXTRADATA_SIZE);
-        return -1;
+    if (alac->avctx->extradata_size < ALAC_EXTRADATA_SIZE) {
+        av_log(avctx, AV_LOG_ERROR, "alac: extradata is too small\n");
+        return AVERROR_INVALIDDATA;
     }
     if (alac_set_info(alac)) {
         av_log(avctx, AV_LOG_ERROR, "alac: set_info failed\n");
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 90876c3778..805dd068fe 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -3127,8 +3127,13 @@ static int decode_slice_header(H264Context *h, H264Context *h0){
 
         if(num_ref_idx_active_override_flag){
             h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
-            if(h->slice_type_nos==AV_PICTURE_TYPE_B)
+            if (h->ref_count[0] < 1)
+                return AVERROR_INVALIDDATA;
+            if (h->slice_type_nos == AV_PICTURE_TYPE_B) {
                 h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
+                if (h->ref_count[1] < 1)
+                    return AVERROR_INVALIDDATA;
+            }
         }
 
         if (h->ref_count[0]-1 > max || h->ref_count[1]-1 > max){
@@ -4047,6 +4052,7 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
             hx->inter_gb_ptr= &hx->inter_gb;
 
             if(hx->redundant_pic_count==0 && hx->intra_gb_ptr && hx->s.data_partitioning
+               && s->current_picture_ptr
                && s->context_initialized
                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=AV_PICTURE_TYPE_B)
diff --git a/libavformat/oggdec.c b/libavformat/oggdec.c
index ceb4091c6e..0342747204 100644
--- a/libavformat/oggdec.c
+++ b/libavformat/oggdec.c
@@ -69,8 +69,7 @@ static int ogg_save(AVFormatContext *s)
 
     for (i = 0; i < ogg->nstreams; i++){
         struct ogg_stream *os = ogg->streams + i;
-        os->buf = av_malloc (os->bufsize);
-        memset (os->buf, 0, os->bufsize);
+        os->buf = av_mallocz (os->bufsize + FF_INPUT_BUFFER_PADDING_SIZE);
         memcpy (os->buf, ost->streams[i].buf, os->bufpos);
     }
 
@@ -161,13 +160,18 @@ static int ogg_new_stream(AVFormatContext *s, uint32_t serial, int new_avstream)
     AVStream *st;
     struct ogg_stream *os;
 
-    ogg->streams = av_realloc (ogg->streams,
-                               ogg->nstreams * sizeof (*ogg->streams));
+    os = av_realloc (ogg->streams, ogg->nstreams * sizeof (*ogg->streams));
+
+    if (!os)
+        return AVERROR(ENOMEM);
+
+    ogg->streams = os;
+
     memset (ogg->streams + idx, 0, sizeof (*ogg->streams));
     os = ogg->streams + idx;
     os->serial = serial;
     os->bufsize = DECODER_BUFFER_SIZE;
-    os->buf = av_malloc(os->bufsize);
+    os->buf = av_malloc(os->bufsize + FF_INPUT_BUFFER_PADDING_SIZE);
     os->header = -1;
 
     if (new_avstream) {
@@ -185,7 +189,7 @@ static int ogg_new_stream(AVFormatContext *s, uint32_t serial, int new_avstream)
 static int ogg_new_buf(struct ogg *ogg, int idx)
 {
     struct ogg_stream *os = ogg->streams + idx;
-    uint8_t *nb = av_malloc(os->bufsize);
+    uint8_t *nb = av_malloc(os->bufsize + FF_INPUT_BUFFER_PADDING_SIZE);
     int size = os->bufpos - os->pstart;
     if(os->buf){
         memcpy(nb, os->buf + os->pstart, size);
@@ -296,7 +300,9 @@ static int ogg_read_page(AVFormatContext *s, int *str)
     }
 
     if (os->bufsize - os->bufpos < size){
-        uint8_t *nb = av_malloc (os->bufsize *= 2);
+        uint8_t *nb = av_malloc ((os->bufsize *= 2) + FF_INPUT_BUFFER_PADDING_SIZE);
+        if (!nb)
+            return AVERROR(ENOMEM);
         memcpy (nb, os->buf, os->bufpos);
         av_free (os->buf);
         os->buf = nb;
@@ -310,6 +316,7 @@ static int ogg_read_page(AVFormatContext *s, int *str)
     os->granule = gp;
     os->flags = flags;
 
+    memset(os->buf + os->bufpos, 0, FF_INPUT_BUFFER_PADDING_SIZE);
     if (str)
         *str = idx;
 
@@ -518,15 +525,30 @@ static int ogg_get_length(AVFormatContext *s)
     return 0;
 }
 
-static int ogg_read_header(AVFormatContext *s, AVFormatParameters *ap)
+static int ogg_read_close(AVFormatContext *s)
+{
+    struct ogg *ogg = s->priv_data;
+    int i;
+
+    for (i = 0; i < ogg->nstreams; i++) {
+        av_free(ogg->streams[i].buf);
+        av_free(ogg->streams[i].private);
+    }
+    av_free(ogg->streams);
+    return 0;
+}
+
+static int ogg_read_header(AVFormatContext *s)
 {
     struct ogg *ogg = s->priv_data;
     int ret, i;
     ogg->curidx = -1;
     //linear headers seek from start
     ret = ogg_get_headers(s);
-    if (ret < 0)
+    if (ret < 0) {
+        ogg_read_close(s);
         return ret;
+    }
 
     for (i = 0; i < ogg->nstreams; i++)
         if (ogg->streams[i].header < 0)
@@ -611,19 +633,6 @@ retry:
     return psize;
 }
 
-static int ogg_read_close(AVFormatContext *s)
-{
-    struct ogg *ogg = s->priv_data;
-    int i;
-
-    for (i = 0; i < ogg->nstreams; i++){
-        av_free (ogg->streams[i].buf);
-        av_free (ogg->streams[i].private);
-    }
-    av_free (ogg->streams);
-    return 0;
-}
-
 static int64_t ogg_read_timestamp(AVFormatContext *s, int stream_index,
                                   int64_t *pos_arg, int64_t pos_limit)
 {
diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index c2a0d26e5e..9442ddcf88 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -1720,6 +1720,7 @@ int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
             rt->cur_transport_priv = NULL;
     }
 
+redo:
     if (rt->transport == RTSP_TRANSPORT_RTP) {
         int i;
         int64_t first_queue_time = 0;
@@ -1735,12 +1736,15 @@ int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
                 first_queue_st   = rt->rtsp_streams[i];
             }
         }
-        if (first_queue_time)
+        if (first_queue_time) {
             wait_end = first_queue_time + s->max_delay;
+        } else {
+            wait_end = 0;
+            first_queue_st = NULL;
+        }
     }
 
     /* read next RTP packet */
- redo:
     if (!rt->recvbuf) {
         rt->recvbuf = av_malloc(RECVBUF_SIZE);
         if (!rt->recvbuf)
diff --git a/libavutil/opt.c b/libavutil/opt.c
index 2f8be3bfba..9f8171541c 100644
--- a/libavutil/opt.c
+++ b/libavutil/opt.c
@@ -56,8 +56,10 @@ const AVOption *av_next_option(void *obj, const AVOption *last)
 const AVOption *av_opt_next(void *obj, const AVOption *last)
 {
     AVClass *class = *(AVClass**)obj;
-    if (!last && class->option[0].name) return class->option;
-    if (last && last[1].name)           return ++last;
+    if (!last && class->option && class->option[0].name)
+        return class->option;
+    if (last && last[1].name)
+        return ++last;
     return NULL;
 }