If the malloc range passed to mem_malloc_init() is at the end of address
range and 'start + size' overflows to 0, following allocations fail as
mem_malloc_end is zero (which looks like uninitialized).
Fix this by subtracting 1 of 'start + size' overflows to zero.
Signed-off-by: Simon Goldschmidt <simon.k.r.goldschm...@gmail.com>
---
Changes in v3: None
Changes in v2: None
common/dlmalloc.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/common/dlmalloc.c b/common/dlmalloc.c
index edaad299bb..51d3bd671a 100644
--- a/common/dlmalloc.c
+++ b/common/dlmalloc.c
@@ -603,6 +603,10 @@ void mem_malloc_init(ulong start, ulong size)
mem_malloc_start = start;
mem_malloc_end = start + size;
mem_malloc_brk = start;
+ if (start && size && !mem_malloc_end) {
+ /* overflow: malloc area is at end of address range */
+ mem_malloc_end--;
+ }
debug("using memory %#lx-%#lx for malloc()\n", mem_malloc_start,
mem_malloc_end);
--
2.17.1
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