From: Alan Modra <amodra@gmail.com>
Date: Thu, 10 Apr 2025 10:11:49 +0000 (+0930)
Subject: PR32858 ld segfault on fuzzed object
X-Git-Tag: binutils-2_45~923
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d1458933830456e54223d9fc61f0d9b3a19256f5;p=thirdparty%2Fbinutils-gdb.git

PR32858 ld segfault on fuzzed object

We missed one place where it is necessary to check for empty groups.

	PR 32858
	* elflink.c (elf_gc_sweep): Protect against empty group.
---

diff --git a/bfd/elflink.c b/bfd/elflink.c
index a76e8e38da7..549b7b7dd92 100644
--- a/bfd/elflink.c
+++ b/bfd/elflink.c
@@ -14408,7 +14408,8 @@ elf_gc_sweep (bfd *abfd, struct bfd_link_info *info)
 	  if (o->flags & SEC_GROUP)
 	    {
 	      asection *first = elf_next_in_group (o);
-	      o->gc_mark = first->gc_mark;
+	      if (first != NULL)
+		o->gc_mark = first->gc_mark;
 	    }
 
 	  if (o->gc_mark)