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authorMichael Niedermayer <michaelni@gmx.at>2014-10-03 17:35:58 +0200
committerMichael Niedermayer <michaelni@gmx.at>2015-03-12 18:03:48 +0100
commit7238c744de4254973d3b04550c5764fd6bfc8267 (patch)
tree2d605ef16c53b0054dcd91951862a96f97eabc0f
parent7c1150bf05cd4f3c216fbe3441894a567a18f2ee (diff)
downloadffmpeg-7238c744de4254973d3b04550c5764fd6bfc8267.tar.gz
avcodec/pngdec: Check bits per pixel before setting monoblack pixel format
Fixes out of array accesses Fixes: asan_heap-oob_14dbfcf_4_asan_heap-oob_1ce5767_179_add_method_small.png Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michaelni@gmx.at> (cherry picked from commit 3e2b745020c2dbf0201fe7df3dad9e7e0b2e1bb6) Conflicts: libavcodec/pngdec.c
-rw-r--r--libavcodec/pngdec.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index 1edef54035..80631f7b51 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -486,7 +486,7 @@ static int decode_frame(AVCodecContext *avctx,
} else if ((s->bits_per_pixel == 1 || s->bits_per_pixel == 2 || s->bits_per_pixel == 4 || s->bits_per_pixel == 8) &&
s->color_type == PNG_COLOR_TYPE_PALETTE) {
avctx->pix_fmt = PIX_FMT_PAL8;
- } else if (s->bit_depth == 1) {
+ } else if (s->bit_depth == 1 && s->bits_per_pixel == 1) {
avctx->pix_fmt = PIX_FMT_MONOBLACK;
} else if (s->bit_depth == 8 &&
s->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) {