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authorLei Zhang <thestig@chromium.org>2015-10-02 10:27:44 -0700
committerLei Zhang <thestig@chromium.org>2015-10-02 10:27:44 -0700
commit095a83c59120c108d9ac6f0ab71fd3faa5eea810 (patch)
tree1914d952be63cbd8dc0f05d3eadcdf44486219b9 /core/src/fxcodec
parentccc8b21622a7d6a7723bc04e065e0ec3666dab64 (diff)
downloadpdfium-095a83c59120c108d9ac6f0ab71fd3faa5eea810.tar.xz
Fix PNG decoding divide by zero error due to zero row count.
BUG=537790 R=tsepez@chromium.org Review URL: https://codereview.chromium.org/1379243002 .
Diffstat (limited to 'core/src/fxcodec')
-rw-r--r--core/src/fxcodec/codec/fx_codec_flate.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/core/src/fxcodec/codec/fx_codec_flate.cpp b/core/src/fxcodec/codec/fx_codec_flate.cpp
index e8878e4535..37aecf106d 100644
--- a/core/src/fxcodec/codec/fx_codec_flate.cpp
+++ b/core/src/fxcodec/codec/fx_codec_flate.cpp
@@ -400,6 +400,8 @@ static FX_BOOL PNG_Predictor(uint8_t*& data_buf,
if (row_size <= 0)
return FALSE;
const int row_count = (data_size + row_size) / (row_size + 1);
+ if (row_count <= 0)
+ return FALSE;
const int last_row_size = data_size % (row_size + 1);
uint8_t* dest_buf = FX_Alloc2D(uint8_t, row_size, row_count);
int byte_cnt = 0;