forked from mirrors/nixpkgs
21 lines
793 B
Diff
21 lines
793 B
Diff
Description: Sanity check for memory allocation.
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In gs_heap_alloc_bytes(), add a sanity check to ensure we don't overflow the
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variable holding the actual number of bytes we allocate.
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Origin: upstream, http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=0c0b085
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Author: Chris Liddell <chris.liddell@artifex.com>
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Forwarded: yes
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Bug-Debian: http://bugs.debian.org/793489
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Last-Update: 2015-07-26
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--- a/base/gsmalloc.c
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+++ b/base/gsmalloc.c
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@@ -178,7 +178,7 @@
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} else {
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uint added = size + sizeof(gs_malloc_block_t);
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- if (mmem->limit - added < mmem->used)
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+ if (added <= size || mmem->limit - added < mmem->used)
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set_msg("exceeded limit");
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else if ((ptr = (byte *) Memento_label(malloc(added), cname)) == 0)
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set_msg("failed");
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