From 54bd47f861e8cdc74aea816ebfbbaac25fefd0d1 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 21 Jun 2019 23:01:04 +0200 Subject: [PATCH] avcodec/flicvideo: Make line_packets int 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 --- libavcodec/flicvideo.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/libavcodec/flicvideo.c b/libavcodec/flicvideo.c index c0e1e16bcd..99868f3ba3 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 = sign_extend(bytestream2_get_le16(&g2), 16); if ((line_packets & 0xC000) == 0xC000) { // line skip opcode line_packets = -line_packets; @@ -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 = sign_extend(bytestream2_get_le16(&g2), 16); 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 = sign_extend(bytestream2_get_le16(&g2), 16); if (line_packets < 0) { line_packets = -line_packets; if (line_packets > s->avctx->height)