From: Mark Wielaard <mark@klomp.org>
Date: Mon, 18 May 2026 17:33:26 +0000 (+0200)
Subject: elfcompress: Don't over allocate sections bitmap
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=59b47e80cc60a5a5aede4b7d468de00490700fa5;p=thirdparty%2Felfutils.git

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 f771b92a..630eb54d 100644
--- 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)