From: Alan Modra <[email-masked]>
Date: Thu, 10 Apr 2025 19:41:49 +0930

Upstream-Status: Backport [https://sourceware.org/git/?p=binutils-gdb.git;a=patch;h=d1458933830456e54223d9fc61f0d9b3a19256f5]
CVE: CVE-2025-5244

PR32858 ld segfault on fuzzed object
We missed one place where it is necessary to check for empty groups.

Signed-off-by: Deepesh Varatharajan <[email-masked]>

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)