ffmpeg | branch: release/6.0 | Michael Niedermayer <mich...@niedermayer.cc> | Wed Jan 11 23:26:06 2023 +0100| [197dcd28efc96a8297d7483389a39030330c6cb4] | committer: Michael Niedermayer
avcodec/pngdec: Check deloco index more exactly Fixes: out of array access: Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PNG_fuzzer-6716193709096960 Alternatively it should be possible to limit this to 3 plane RGB 8 /16bit to ensure the size is what it should be Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit d5bae704068dc37191280e024eecb8d02b762b28) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=197dcd28efc96a8297d7483389a39030330c6cb4 --- libavcodec/pngdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c index 0d969decf2..1ba1bb20d0 100644 --- a/libavcodec/pngdec.c +++ b/libavcodec/pngdec.c @@ -329,7 +329,7 @@ void ff_png_filter_row(PNGDSPContext *dsp, uint8_t *dst, int filter_type, static void deloco_ ## NAME(TYPE *dst, int size, int alpha) \ { \ int i; \ - for (i = 0; i < size; i += 3 + alpha) { \ + for (i = 0; i < size - 2; i += 3 + alpha) { \ int g = dst [i + 1]; \ dst[i + 0] += g; \ dst[i + 2] += g; \ _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
