From: Alan Modra <amodra@gmail.com>
Date: Thu, 15 Sep 2022 11:15:57 +0000 (+0930)
Subject: pdb sanity check block_size
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=839a4671a9c2468f2a1b745ec251e03249f66d11;p=binutils-gdb.git

pdb sanity check block_size

	* pdb.c (pdb_get_elt_at_index): Only allow block_size to be
	512, 1024, 2048, or 4096.
---

diff --git a/bfd/pdb.c b/bfd/pdb.c
index 9a431c23b1f..67d7e73c655 100644
--- a/bfd/pdb.c
+++ b/bfd/pdb.c
@@ -79,6 +79,13 @@ pdb_get_elt_at_index (bfd *abfd, symindex sym_index)
     }
 
   block_size = bfd_getl32 (int_buf);
+  if ((block_size & -block_size) != block_size
+      || block_size < 512
+      || block_size > 4096)
+    {
+      bfd_set_error (bfd_error_malformed_archive);
+      return NULL;
+    }
 
   /* Get block_map_addr.  */