Fixes: runtime error: signed integer overflow: -1094995529 * 2 cannot be represented in type 'int' Fixes: 4828/clusterfuzz-testcase-minimized-5100849937252352
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/snowdec.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/libavcodec/snowdec.c b/libavcodec/snowdec.c index a9bdb8da5e..0146a2a4c9 100644 --- a/libavcodec/snowdec.c +++ b/libavcodec/snowdec.c @@ -363,9 +363,10 @@ static int decode_header(SnowContext *s){ int htaps, i, sum=0; Plane *p= &s->plane[plane_index]; p->diag_mc= get_rac(&s->c, s->header_state); - htaps= get_symbol(&s->c, s->header_state, 0)*2 + 2; - if((unsigned)htaps >= HTAPS_MAX || htaps==0) + htaps= get_symbol(&s->c, s->header_state, 0); + if((unsigned)htaps >= HTAPS_MAX/2 - 1) return AVERROR_INVALIDDATA; + htaps = htaps*2 + 2; p->htaps= htaps; for(i= htaps/2; i; i--){ p->hcoeff[i]= get_symbol(&s->c, s->header_state, 0) * (1-2*(i&1)); -- 2.15.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
