From: Alan Modra <amodra@gmail.com>
Date: Sat, 23 May 2020 07:21:30 +0000 (+0930)
Subject: Fix potential segfault
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=c892b44730bb1a66d614fd47fabe47555ca83b3b;p=deliverable%2Fbinutils-gdb.git

Fix potential segfault

Code in vms-lib.c leaves arch_header NULL.

	* bfdio.c (bfd_get_file_size): Don't segfault on NULL arch_header.
---

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 90274890ea..2da474e02c 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-23  Alan Modra  <amodra@gmail.com>
+
+	* bfdio.c (bfd_get_file_size): Don't segfault on NULL arch_header.
+
 2020-05-22  Alan Modra  <amodra@gmail.com>
 
 	PR 25882
diff --git a/bfd/bfdio.c b/bfd/bfdio.c
index 5ef3ec493e..5f144bc7f3 100644
--- a/bfd/bfdio.c
+++ b/bfd/bfdio.c
@@ -495,8 +495,9 @@ bfd_get_file_size (bfd *abfd)
       struct areltdata *adata = (struct areltdata *) abfd->arelt_data;
       archive_size = adata->parsed_size;
       /* If the archive is compressed we can't compare against file size.  */
-      if (memcmp (((struct ar_hdr *) adata->arch_header)->ar_fmag,
-		  "Z\012", 2) == 0)
+      if (adata->arch_header != NULL
+	  && memcmp (((struct ar_hdr *) adata->arch_header)->ar_fmag,
+		     "Z\012", 2) == 0)
 	return archive_size;
       abfd = abfd->my_archive;
     }