man/man3/mallinfo.3: Reduce MAX_ALLOCS

The current mallinfo2() example segfaults on 64bit Linux.
This happens because it builds a large 'alloc' array
on the stack, which is currently 2M entries, each of which
is a pointer, so hitting 16MB which is more than the default
Linux stack ulimit of 8MiB.

Reduce it.

Signed-off-by: "Dr. David Alan Gilbert" <dave@treblig.org>
Message-ID: <20250816204252.63616-1-dave@treblig.org>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

diff --git a/man/man3/mallinfo.3 b/man/man3/mallinfo.3
index 5e722e38ef4517853ce25ea746d6dc5692f2bbff..0e1deb7488078e65cbffdd3e6a6c0067688e78c5 100644 (file)
--- a/man/man3/mallinfo.3
+++ b/man/man3/mallinfo.3
@@ -282,7 +282,7 @@ display_mallinfo2(void)
 int
 main(int argc, char *argv[])
 {
-#define MAX_ALLOCS 2000000
+#define MAX_ALLOCS 500000
     char *alloc[MAX_ALLOCS];
     size_t blockSize, numBlocks, freeBegin, freeEnd, freeStep;
 \&