1From 11c8026913e190b02266c1247e7a770e488d925e Mon Sep 17 00:00:00 2001 2From: Even Rouault <even.rouault@spatialys.com> 3Date: Tue, 8 Nov 2022 15:16:58 +0100 4Subject: [PATCH] TIFFReadRGBATileExt(): fix (unsigned) integer overflow on 5 strips/tiles > 2 GB 6 7Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=53137 8Upstream-Status: Accepted 9 10Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> 11--- 12 libtiff/tif_getimage.c | 8 ++++---- 13 1 file changed, 4 insertions(+), 4 deletions(-) 14 15diff --git a/libtiff/tif_getimage.c b/libtiff/tif_getimage.c 16index a1b6570b..9a2e0c59 100644 17--- a/libtiff/tif_getimage.c 18+++ b/libtiff/tif_getimage.c 19@@ -3058,15 +3058,15 @@ TIFFReadRGBATileExt(TIFF* tif, uint32_t col, uint32_t row, uint32_t * raster, in 20 return( ok ); 21 22 for( i_row = 0; i_row < read_ysize; i_row++ ) { 23- memmove( raster + (tile_ysize - i_row - 1) * tile_xsize, 24- raster + (read_ysize - i_row - 1) * read_xsize, 25+ memmove( raster + (size_t)(tile_ysize - i_row - 1) * tile_xsize, 26+ raster + (size_t)(read_ysize - i_row - 1) * read_xsize, 27 read_xsize * sizeof(uint32_t) ); 28- _TIFFmemset( raster + (tile_ysize - i_row - 1) * tile_xsize+read_xsize, 29+ _TIFFmemset( raster + (size_t)(tile_ysize - i_row - 1) * tile_xsize+read_xsize, 30 0, sizeof(uint32_t) * (tile_xsize - read_xsize) ); 31 } 32 33 for( i_row = read_ysize; i_row < tile_ysize; i_row++ ) { 34- _TIFFmemset( raster + (tile_ysize - i_row - 1) * tile_xsize, 35+ _TIFFmemset( raster + (size_t)(tile_ysize - i_row - 1) * tile_xsize, 36 0, sizeof(uint32_t) * tile_xsize ); 37 } 38 39