diff options
author | Michael Niedermayer <michael@niedermayer.cc> | 2018-01-31 19:50:21 +0300 |
---|---|---|
committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-02-02 02:18:24 +0300 |
commit | 0a2560a9775be7c5df09c85c9908b05e711a54a3 (patch) | |
tree | f052089e30da508af994e6dbcbc07edcad15841a /libavcodec/exr.c | |
parent | b1af0e23a3b685b3e626158f63e5f958f5f75420 (diff) |
avcodec/exr: Fix memleaks in decode_header()
Fixes: 4793/clusterfuzz-testcase-minimized-5707366629638144
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/exr.c')
-rw-r--r-- | libavcodec/exr.c | 82 |
1 files changed, 56 insertions, 26 deletions
diff --git a/libavcodec/exr.c b/libavcodec/exr.c index 454dc74cfb..f08576af22 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -1306,6 +1306,7 @@ static int decode_header(EXRContext *s, AVFrame *frame) AVDictionary *metadata = NULL; int magic_number, version, i, flags, sar = 0; int layer_match = 0; + int ret; s->current_channel_offset = 0; s->xmin = ~0; @@ -1364,8 +1365,10 @@ static int decode_header(EXRContext *s, AVFrame *frame) if ((var_size = check_header_variable(s, "channels", "chlist", 38)) >= 0) { GetByteContext ch_gb; - if (!var_size) - return AVERROR_INVALIDDATA; + if (!var_size) { + ret = AVERROR_INVALIDDATA; + goto fail; + } bytestream2_init(&ch_gb, s->gb.buffer, var_size); @@ -1424,14 +1427,16 @@ static int decode_header(EXRContext *s, AVFrame *frame) if (bytestream2_get_bytes_left(&ch_gb) < 4) { av_log(s->avctx, AV_LOG_ERROR, "Incomplete header.\n"); - return AVERROR_INVALIDDATA; + ret = AVERROR_INVALIDDATA; + goto fail; } current_pixel_type = bytestream2_get_le32(&ch_gb); if (current_pixel_type >= EXR_UNKNOWN) { avpriv_report_missing_feature(s->avctx, "Pixel type %d", current_pixel_type); - return AVERROR_PATCHWELCOME; + ret = AVERROR_PATCHWELCOME; + goto fail; } bytestream2_skip(&ch_gb, 4); @@ -1442,7 +1447,8 @@ static int decode_header(EXRContext *s, AVFrame *frame) avpriv_report_missing_feature(s->avctx, "Subsampling %dx%d", xsub, ysub); - return AVERROR_PATCHWELCOME; + ret = AVERROR_PATCHWELCOME; + goto fail; } if (channel_index >= 0 && s->channel_offsets[channel_index] == -1) { /* channel has not been previously assigned */ @@ -1450,7 +1456,8 @@ static int decode_header(EXRContext *s, AVFrame *frame) s->pixel_type != current_pixel_type) { av_log(s->avctx, AV_LOG_ERROR, "RGB channels not of the same depth.\n"); - return AVERROR_INVALIDDATA; + ret = AVERROR_INVALIDDATA; + goto fail; } s->pixel_type = current_pixel_type; s->channel_offsets[channel_index] = s->current_channel_offset; @@ -1458,8 +1465,10 @@ static int decode_header(EXRContext *s, AVFrame *frame) s->channels = av_realloc(s->channels, ++s->nb_channels * sizeof(EXRChannel)); - if (!s->channels) - return AVERROR(ENOMEM); + if (!s->channels) { + ret = AVERROR(ENOMEM); + goto fail; + } channel = &s->channels[s->nb_channels - 1]; channel->pixel_type = current_pixel_type; channel->xsub = xsub; @@ -1484,7 +1493,8 @@ static int decode_header(EXRContext *s, AVFrame *frame) av_log(s->avctx, AV_LOG_ERROR, "Missing green channel.\n"); if (s->channel_offsets[2] < 0) av_log(s->avctx, AV_LOG_ERROR, "Missing blue channel.\n"); - return AVERROR_INVALIDDATA; + ret = AVERROR_INVALIDDATA; + goto fail; } } @@ -1493,8 +1503,10 @@ static int decode_header(EXRContext *s, AVFrame *frame) continue; } else if ((var_size = check_header_variable(s, "dataWindow", "box2i", 31)) >= 0) { - if (!var_size) - return AVERROR_INVALIDDATA; + if (!var_size) { + ret = AVERROR_INVALIDDATA; + goto fail; + } s->xmin = bytestream2_get_le32(&s->gb); s->ymin = bytestream2_get_le32(&s->gb); @@ -1506,8 +1518,10 @@ static int decode_header(EXRContext *s, AVFrame *frame) continue; } else if ((var_size = check_header_variable(s, "displayWindow", "box2i", 34)) >= 0) { - if (!var_size) - return AVERROR_INVALIDDATA; + if (!var_size) { + ret = AVERROR_INVALIDDATA; + goto fail; + } bytestream2_skip(&s->gb, 8); s->w = bytestream2_get_le32(&s->gb) + 1; @@ -1517,29 +1531,36 @@ static int decode_header(EXRContext *s, AVFrame *frame) } else if ((var_size = check_header_variable(s, "lineOrder", "lineOrder", 25)) >= 0) { int line_order; - if (!var_size) - return AVERROR_INVALIDDATA; + if (!var_size) { + ret = AVERROR_INVALIDDATA; + goto fail; + } line_order = bytestream2_get_byte(&s->gb); av_log(s->avctx, AV_LOG_DEBUG, "line order: %d.\n", line_order); if (line_order > 2) { av_log(s->avctx, AV_LOG_ERROR, "Unknown line order.\n"); - return AVERROR_INVALIDDATA; + ret = AVERROR_INVALIDDATA; + goto fail; } continue; } else if ((var_size = check_header_variable(s, "pixelAspectRatio", "float", 31)) >= 0) { - if (!var_size) - return AVERROR_INVALIDDATA; + if (!var_size) { + ret = AVERROR_INVALIDDATA; + goto fail; + } sar = bytestream2_get_le32(&s->gb); continue; } else if ((var_size = check_header_variable(s, "compression", "compression", 29)) >= 0) { - if (!var_size) - return AVERROR_INVALIDDATA; + if (!var_size) { + ret = AVERROR_INVALIDDATA; + goto fail; + } if (s->compression == EXR_UNKN) s->compression = bytestream2_get_byte(&s->gb); @@ -1566,13 +1587,15 @@ static int decode_header(EXRContext *s, AVFrame *frame) if (s->tile_attr.level_mode >= EXR_TILE_LEVEL_UNKNOWN){ avpriv_report_missing_feature(s->avctx, "Tile level mode %d", s->tile_attr.level_mode); - return AVERROR_PATCHWELCOME; + ret = AVERROR_PATCHWELCOME; + goto fail; } if (s->tile_attr.level_round >= EXR_TILE_ROUND_UNKNOWN) { avpriv_report_missing_feature(s->avctx, "Tile level round %d", s->tile_attr.level_round); - return AVERROR_PATCHWELCOME; + ret = AVERROR_PATCHWELCOME; + goto fail; } continue; @@ -1589,7 +1612,8 @@ static int decode_header(EXRContext *s, AVFrame *frame) // Check if there are enough bytes for a header if (bytestream2_get_bytes_left(&s->gb) <= 9) { av_log(s->avctx, AV_LOG_ERROR, "Incomplete header\n"); - return AVERROR_INVALIDDATA; + ret = AVERROR_INVALIDDATA; + goto fail; } // Process unknown variables @@ -1604,19 +1628,22 @@ static int decode_header(EXRContext *s, AVFrame *frame) if (s->compression == EXR_UNKN) { av_log(s->avctx, AV_LOG_ERROR, "Missing compression attribute.\n"); - return AVERROR_INVALIDDATA; + ret = AVERROR_INVALIDDATA; + goto fail; } if (s->is_tile) { if (s->tile_attr.xSize < 1 || s->tile_attr.ySize < 1) { av_log(s->avctx, AV_LOG_ERROR, "Invalid tile attribute.\n"); - return AVERROR_INVALIDDATA; + ret = AVERROR_INVALIDDATA; + goto fail; } } if (bytestream2_get_bytes_left(&s->gb) <= 0) { av_log(s->avctx, AV_LOG_ERROR, "Incomplete frame.\n"); - return AVERROR_INVALIDDATA; + ret = AVERROR_INVALIDDATA; + goto fail; } frame->metadata = metadata; @@ -1624,6 +1651,9 @@ static int decode_header(EXRContext *s, AVFrame *frame) // aaand we are done bytestream2_skip(&s->gb, 1); return 0; +fail: + av_dict_free(&metadata); + return ret; } static int decode_frame(AVCodecContext *avctx, void *data, |