diff options
Diffstat (limited to 'libavcodec/mjpegbdec.c')
| -rw-r--r-- | libavcodec/mjpegbdec.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/libavcodec/mjpegbdec.c b/libavcodec/mjpegbdec.c index c8b1452e9e..fc77b14b44 100644 --- a/libavcodec/mjpegbdec.c +++ b/libavcodec/mjpegbdec.c @@ -59,6 +59,9 @@ read_header: s->restart_count = 0; s->mjpb_skiptosod = 0; + if (buf_end - buf_ptr >= 1 << 28) + return AVERROR_INVALIDDATA; + init_get_bits(&hgb, buf_ptr, /*buf_size*/(buf_end - buf_ptr)*8); skip_bits(&hgb, 32); /* reserved zeros */ @@ -111,7 +114,8 @@ read_header: av_log(avctx, AV_LOG_DEBUG, "sod offs: 0x%x\n", sod_offs); if (sos_offs) { - init_get_bits(&s->gb, buf_ptr+sos_offs, FFMIN(field_size, buf_end - (buf_ptr+sos_offs))*8); + init_get_bits(&s->gb, buf_ptr + sos_offs, + 8 * FFMIN(field_size, buf_end - buf_ptr - sos_offs)); s->mjpb_skiptosod = (sod_offs - sos_offs - show_bits(&s->gb, 16)); s->start_code = SOS; if (ff_mjpeg_decode_sos(s, NULL, NULL) < 0 && |