From 2740544881f652566756815dda4da0bcd946e9de Mon Sep 17 00:00:00 2001 From: Wolfgang Denk Date: Fri, 15 Jan 2010 11:20:10 +0100 Subject: [PATCH] malloc: return NULL if not initialized yet When malloc() was called before it was properly initialized (as would happen if when used before relocation to RAM) it returned random, non-NULL values, which called all kinds of difficult to debug subsequent errors. Make sure to return NULL when initialization was not done yet. Signed-off-by: Wolfgang Denk --- common/dlmalloc.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/common/dlmalloc.c b/common/dlmalloc.c index 735b3443e6..205fc40ac8 100644 --- a/common/dlmalloc.c +++ b/common/dlmalloc.c @@ -2179,6 +2179,12 @@ Void_t* mALLOc(bytes) size_t bytes; INTERNAL_SIZE_T nb; + /* check if mem_malloc_init() was run */ + if ((mem_malloc_start == 0) && (mem_malloc_end == 0)) { + /* not initialized yet */ + return 0; + } + if ((long)bytes < 0) return 0; nb = request2size(bytes); /* padded request size; */ -- 2.30.2