From 227500897dfb07fb7d27f7aa570050e62617e3be Mon Sep 17 00:00:00 2001
From: Even Rouault <[EMAIL REDACTED]>
Date: Tue, 8 Nov 2022 15:16:58 +0100
Subject: [PATCH] TIFFReadRGBATileExt(): fix (unsigned) integer overflow on
strips/tiles > 2 GB
Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=53137
---
libtiff/tif_getimage.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/libtiff/tif_getimage.c b/libtiff/tif_getimage.c
index a4d0c1d6..60b94d8e 100644
--- a/libtiff/tif_getimage.c
+++ b/libtiff/tif_getimage.c
@@ -3016,15 +3016,15 @@ TIFFReadRGBATileExt(TIFF* tif, uint32_t col, uint32_t row, uint32_t * raster, in
return( ok );
for( i_row = 0; i_row < read_ysize; i_row++ ) {
- memmove( raster + (tile_ysize - i_row - 1) * tile_xsize,
- raster + (read_ysize - i_row - 1) * read_xsize,
+ memmove( raster + (size_t)(tile_ysize - i_row - 1) * tile_xsize,
+ raster + (size_t)(read_ysize - i_row - 1) * read_xsize,
read_xsize * sizeof(uint32_t) );
- _TIFFmemset( raster + (tile_ysize - i_row - 1) * tile_xsize+read_xsize,
+ _TIFFmemset( raster + (size_t)(tile_ysize - i_row - 1) * tile_xsize+read_xsize,
0, sizeof(uint32_t) * (tile_xsize - read_xsize) );
}
for( i_row = read_ysize; i_row < tile_ysize; i_row++ ) {
- _TIFFmemset( raster + (tile_ysize - i_row - 1) * tile_xsize,
+ _TIFFmemset( raster + (size_t)(tile_ysize - i_row - 1) * tile_xsize,
0, sizeof(uint32_t) * tile_xsize );
}