Reimar Döffinger <[email protected]> added the comment:
On Wed, Nov 17, 2010 at 09:41:50PM +0000, kcraigie wrote:
> Program received signal SIGSEGV, Segmentation fault.
> avi_read_packet (s=<value optimized out>, pkt=0x3baa0c40) at
> libavformat/avidec.c:705
Please provide a sample file and test this patch:
Index: ffmpeg/libavformat/avidec.c
===================================================================
--- ffmpeg/libavformat/avidec.c (revision 25760)
+++ ffmpeg/libavformat/avidec.c (working copy)
@@ -699,6 +699,9 @@
}
static int read_gab2_sub(AVStream *st, AVPacket *pkt) {
+ // make sure we will not crash with 0-size packets
+ if (pkt->size < 17)
+ return 0;
if (!strcmp(pkt->data, "GAB2") && AV_RL16(pkt->data+5) == 2) {
uint8_t desc[256], *d = desc;
uint8_t *end, *ptr = pkt->data+7;
@@ -710,7 +713,7 @@
ByteIOContext *pb;
AVProbeData pd;
- if (desc_len > FFMAX(pkt->size-17, 0))
+ if (desc_len > pkt->size-17)
return 0;
end = ptr + desc_len;
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<https://roundup.ffmpeg.org/issue2365>
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