42 lines
1.3 KiB
Diff
42 lines
1.3 KiB
Diff
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diff --git a/tools/gif2tiff.c b/tools/gif2tiff.c
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index 2731273..ca824e2 100644
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--- a/tools/gif2tiff.c
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+++ b/tools/gif2tiff.c
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@@ -280,6 +280,10 @@ readgifimage(char* mode)
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fprintf(stderr, "no colormap present for image\n");
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return (0);
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}
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+ if (width == 0 || height == 0) {
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+ fprintf(stderr, "Invalid value of width or height\n");
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+ return(0);
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+ }
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if ((raster = (unsigned char*) _TIFFmalloc(width*height+EXTRAFUDGE)) == NULL) {
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fprintf(stderr, "not enough memory for image\n");
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return (0);
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@@ -406,7 +410,11 @@ process(register int code, unsigned char** fill)
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fprintf(stderr, "bad input: code=%d is larger than clear=%d\n",code, clear);
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return 0;
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}
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- *(*fill)++ = suffix[code];
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+ if (*fill >= raster + width*height) {
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+ fprintf(stderr, "raster full before eoi code\n");
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+ return 0;
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+ }
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+ *(*fill)++ = suffix[code];
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firstchar = oldcode = code;
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return 1;
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}
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@@ -436,7 +444,11 @@ process(register int code, unsigned char** fill)
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}
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oldcode = incode;
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do {
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- *(*fill)++ = *--stackp;
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+ if (*fill >= raster + width*height) {
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+ fprintf(stderr, "raster full before eoi code\n");
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+ return 0;
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+ }
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+ *(*fill)++ = *--stackp;
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} while (stackp > stack);
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return 1;
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}
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