Fixes: signed integer overflow: -32768 * 196032 cannot be represented in type 'int' Fixes: 15300/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FLIC_fuzzer-5733319519502336
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/flicvideo.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/libavcodec/flicvideo.c b/libavcodec/flicvideo.c index ba5bda48c4..cd9cd089af 100644 --- a/libavcodec/flicvideo.c +++ b/libavcodec/flicvideo.c @@ -175,7 +175,7 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx, int lines; int compressed_lines; int starting_line; - signed short line_packets; + int line_packets; int y_ptr; int byte_run; int pixel_skip; @@ -274,7 +274,7 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx, break; if (y_ptr > pixel_limit) return AVERROR_INVALIDDATA; - line_packets = bytestream2_get_le16(&g2); + line_packets = (int16_t)bytestream2_get_le16(&g2); if ((line_packets & 0xC000) == 0xC000) { // line skip opcode line_packets = -line_packets; @@ -340,7 +340,7 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx, pixel_countdown = s->avctx->width; if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk) break; - line_packets = bytestream2_get_byte(&g2); + line_packets = (int16_t)bytestream2_get_byte(&g2); if (line_packets > 0) { for (i = 0; i < line_packets; i++) { /* account for the skip bytes */ @@ -508,7 +508,7 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx, int lines; int compressed_lines; - signed short line_packets; + int line_packets; int y_ptr; int byte_run; int pixel_skip; @@ -572,7 +572,7 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx, break; if (y_ptr > pixel_limit) return AVERROR_INVALIDDATA; - line_packets = bytestream2_get_le16(&g2); + line_packets = (int16_t)bytestream2_get_le16(&g2); if (line_packets < 0) { line_packets = -line_packets; if (line_packets > s->avctx->height) @@ -806,7 +806,7 @@ static int flic_decode_frame_24BPP(AVCodecContext *avctx, int lines; int compressed_lines; - signed short line_packets; + int line_packets; int y_ptr; int byte_run; int pixel_skip; @@ -870,7 +870,7 @@ static int flic_decode_frame_24BPP(AVCodecContext *avctx, break; if (y_ptr > pixel_limit) return AVERROR_INVALIDDATA; - line_packets = bytestream2_get_le16(&g2); + line_packets = (int16_t)bytestream2_get_le16(&g2); if (line_packets < 0) { line_packets = -line_packets; if (line_packets > s->avctx->height) -- 2.22.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
