avcodec/cpia: Fix missing src_size update

Fixes: out of array read Fixes: 35210/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CPIA_fuzzer-5669199688105984 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
4 years ago · cea05864e6
parent 18b0dd0738
commit cea05864e6
1 changed files with 1 additions and 0 deletions
--- a/libavcodec/cpia.c
+++ b/libavcodec/cpia.c
@ -111,6 +111,7 @@ static int cpia_decode_frame(AVCodecContext *avctx,
        // Read line length, two byte little endian
        linelength = AV_RL16(src);
        src += 2;
+        src_size -= 2;

        if (src_size < linelength) {
            frame->decode_error_flags = FF_DECODE_ERROR_INVALID_BITSTREAM;