elfcompress: Don't over allocate sections bitmap

In process_file we allocate a bitmap sections to track which sections
we want to (de)compress. This allocates shnum / 8 + 1 unsigned
ints. But an unsigned int can contain more bits than just 8. In all
other places we use WORD_BITS defined as 8U * sizeof (unsigned int).
Also use WORD_BITS to calculate how many unsigned ints we need for the
sections bitmap.

	* src/elfcompress.c (process_file): Use shnum / WORD_BITS + 1
	to allocate sections.

Signed-off-by: Mark Wielaard <mark@klomp.org>

diff --git a/src/elfcompress.c b/src/elfcompress.c
index f771b92afabf9974e3e2cf26d4ea3bd2bd7a3789..630eb54da1c09adfd9b22fa6764613bda6446f12 100644 (file)
--- a/src/elfcompress.c
+++ b/src/elfcompress.c
@@ -424,7 +424,7 @@ process_file (const char *fname)
       goto cleanup;
     }
 
-  sections = xcalloc (shnum / 8 + 1, sizeof (unsigned int));
+  sections = xcalloc (shnum / WORD_BITS + 1, sizeof (unsigned int));
 
   size_t phnum;
   if (elf_getphdrnum (elf, &phnum) != 0)