Merge commit 'cb5d0ea0bec119ecbe327bd7d3834987ab42ec1a' into release/0.10

* commit 'cb5d0ea0bec119ecbe327bd7d3834987ab42ec1a':
  flashsv: Check diff_start diff_height values
  dsputil/pngdsp: fix signed/unsigned type in end comparison
  vqavideo: check chunk sizes before reading chunks
  avi: directly resync on DV in AVI read failure
  get_bits: change the failure condition in init_get_bits
  twinvq: Cope with gcc-4.8.2 miscompilation

Conflicts:
	libavcodec/dsputil.c
	libavcodec/flashsv.c
	libavcodec/get_bits.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>

6 files changed, 21 insertions, 5 deletions

diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 6264832e56..dab74cced2 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -1912,7 +1912,7 @@ void ff_set_cmp(DSPContext* c, me_cmp_func *cmp, int type){
 
 static void add_bytes_c(uint8_t *dst, uint8_t *src, int w){
     long i;
-    for(i=0; i<=w-(int)sizeof(long); i+=sizeof(long)){
+    for (i = 0; i <= w - (int) sizeof(long); i += sizeof(long)) {
         long a = *(long*)(src+i);
         long b = *(long*)(dst+i);
         *(long*)(dst+i) = ((a&pb_7f) + (b&pb_7f)) ^ ((a^b)&pb_80);
@@ -1937,7 +1937,7 @@ static void diff_bytes_c(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w){
         }
     }else
 #endif
-    for(i=0; i<=w-(int)sizeof(long); i+=sizeof(long)){
+    for (i = 0; i <= w - (int) sizeof(long); i += sizeof(long)) {
         long a = *(long*)(src1+i);
         long b = *(long*)(src2+i);
         *(long*)(dst+i) = ((a|pb_80) - (b&pb_7f)) ^ ((a^b^pb_80)&pb_80);
diff --git a/libavcodec/flashsv.c b/libavcodec/flashsv.c
index 7ef4ade58e..e74c318459 100644
--- a/libavcodec/flashsv.c
+++ b/libavcodec/flashsv.c
@@ -389,7 +389,9 @@ static int flashsv_decode_frame(AVCodecContext *avctx, void *data,
                     s->diff_start  = get_bits(&gb, 8);
                     s->diff_height = get_bits(&gb, 8);
                     if (s->diff_start + s->diff_height > cur_blk_height) {
-                        av_log(avctx, AV_LOG_ERROR, "Block parameters invalid\n");
+                        av_log(avctx, AV_LOG_ERROR,
+                               "Block parameters invalid: %d + %d > %d\n",
+                               s->diff_start, s->diff_height, cur_blk_height);
                         return AVERROR_INVALIDDATA;
                     }
                     av_log(avctx, AV_LOG_DEBUG,
diff --git a/libavcodec/get_bits.h b/libavcodec/get_bits.h
index afa4f2ac44..38ae4ca1cb 100644
--- a/libavcodec/get_bits.h
+++ b/libavcodec/get_bits.h
@@ -355,7 +355,7 @@ static inline int init_get_bits(GetBitContext *s, const uint8_t *buffer,
     int buffer_size;
     int ret = 0;
 
-    if (bit_size > INT_MAX - 7 || bit_size < 0) {
+    if (bit_size > INT_MAX - 7 || bit_size < 0 || !buffer) {
         buffer_size = bit_size = 0;
         buffer = NULL;
         ret = AVERROR_INVALIDDATA;
diff --git a/libavcodec/twinvq.c b/libavcodec/twinvq.c
index 6c958d9df1..de53eb338d 100644
--- a/libavcodec/twinvq.c
+++ b/libavcodec/twinvq.c
@@ -996,7 +996,7 @@ static void linear_perm(int16_t *out, int16_t *in, int n_blocks, int size)
         out[i] = block_size * (in[i] % n_blocks) + in[i] / n_blocks;
 }
 
-static av_cold void construct_perm_table(TwinContext *tctx,enum FrameType ftype)
+static av_cold void construct_perm_table(TwinContext *tctx, int ftype)
 {
     int block_size;
     const ModeTab *mtab = tctx->mtab;
diff --git a/libavcodec/vqavideo.c b/libavcodec/vqavideo.c
index 682079dd9a..f3ad4f2fbe 100644
--- a/libavcodec/vqavideo.c
+++ b/libavcodec/vqavideo.c
@@ -534,6 +534,12 @@ static int vqa_decode_chunk(VqaContext *s)
         bytestream2_seek(&s->gb, cbp0_chunk, SEEK_SET);
         chunk_size = bytestream2_get_be32(&s->gb);
 
+        if (chunk_size > MAX_CODEBOOK_SIZE - s->next_codebook_buffer_index) {
+            av_log(s->avctx, AV_LOG_ERROR, "cbp0 chunk too large (%u bytes)\n",
+                   chunk_size);
+            return AVERROR_INVALIDDATA;
+        }
+
         /* accumulate partial codebook */
         bytestream2_get_buffer(&s->gb, &s->next_codebook_buffer[s->next_codebook_buffer_index],
                                chunk_size);
@@ -557,6 +563,12 @@ static int vqa_decode_chunk(VqaContext *s)
         bytestream2_seek(&s->gb, cbpz_chunk, SEEK_SET);
         chunk_size = bytestream2_get_be32(&s->gb);
 
+        if (chunk_size > MAX_CODEBOOK_SIZE - s->next_codebook_buffer_index) {
+            av_log(s->avctx, AV_LOG_ERROR, "cbpz chunk too large (%u bytes)\n",
+                   chunk_size);
+            return AVERROR_INVALIDDATA;
+        }
+
         /* accumulate partial codebook */
         bytestream2_get_buffer(&s->gb, &s->next_codebook_buffer[s->next_codebook_buffer_index],
                                chunk_size);
diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index 1d4bcf7cbb..5a8d5a7741 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -1051,6 +1051,8 @@ static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
         int size = avpriv_dv_get_packet(avi->dv_demux, pkt);
         if (size >= 0)
             return size;
+        else
+            goto resync;
     }
 
     if(avi->non_interleaved){