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acm may coredump immediately after starting on systems which do not zero malloc()ed memory e.g., MALLOC_CONF=junk:true. This is because one of the fields of a malloc()ed data structure (w) contains a pointer (w->csPool2), and if that pointer is never used, then later code will find the pointer is non-NULL and try to free() the memory pointed to by the pointer. PR: 215427 Submitted by: Jeff Gibbons <jgibbons@protogate.com>
16 lines
616 B
C
16 lines
616 B
C
--- V/lib/InitAWin.c.orig 1998-08-14 21:09:02 UTC
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+++ V/lib/InitAWin.c
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@@ -69,6 +69,13 @@ InitializeX11AWindow(Display * dpy, int screen, Drawab
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w->csPool1 = (ColorSegment *) malloc(w->CSSize1 * sizeof(ColorSegment));
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memset(w->csPool1, 0, w->CSSize1 * sizeof(ColorSegment));
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+ // Initialize csPool2 so program doesn't crash later,
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+ // when trying to free it.
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+ {
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+ w->CSSize2 = 0;
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+ w->csPool2 = (ColorSegment *) NULL;
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+ }
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+
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w->scanLine = (ScanLine *) malloc((w->height + 1) * sizeof(ScanLine));
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w->lastScanLine = (ScanLine *) malloc((w->height + 1) * sizeof(ScanLine));
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w->otherLastScanLine = NULL;
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