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bzip2/lzma/gzip: pre-boot malloc doesn't return NULL on failure

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The trivial malloc implementation used in the pre-boot environment by the
decompressors returns a bad pointer on failure (falling through after
calling error).  This is doubly wrong - the callers expect malloc to
return NULL on failure, second the error function is intended to be
used by the decompressors to propagate errors to *their* callers.  The
decompressors have no access to any state set by the error function.

Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
LKML-Reference: <4b26b1ef.hIInb2AYPMtImAJO%phillip@lougher.demon.co.uk>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Phillip Lougher 2009-12-14 21:45:19 +00:00 committed by H. Peter Anvin
parent 23637568ad
commit c1e7c3ae59
1 changed files with 2 additions and 2 deletions
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4
include/linux/decompress/mm.h
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@ -25,7 +25,7 @@ static void *malloc(int size)
void *p; void *p;
if (size < 0) if (size < 0)
error("Malloc error"); return NULL;
if (!malloc_ptr) if (!malloc_ptr)
malloc_ptr = free_mem_ptr; malloc_ptr = free_mem_ptr;
@ -35,7 +35,7 @@ static void *malloc(int size)
malloc_ptr += size; malloc_ptr += size;
if (free_mem_end_ptr && malloc_ptr >= free_mem_end_ptr) if (free_mem_end_ptr && malloc_ptr >= free_mem_end_ptr)
error("Out of memory"); return NULL;
malloc_count++; malloc_count++;
return p; return p;