[binutils-gdb] asan: vms-alpha: stack buffer overflow

[Alan Modra]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=5cbc0eb01a403419d7be753bfdbf1c638a92d759

commit 5cbc0eb01a403419d7be753bfdbf1c638a92d759
Author: Alan Modra <amodra@gmail.com>
Date:   Mon Nov 9 23:23:34 2020 +1030

    asan: vms-alpha: stack buffer overflow
    
    32 bits is too big for the field.
    
            * vms-alpha.c (alpha_vms_write_exec): Write 16 bits to eihd.alias.

Diff:
---
 bfd/ChangeLog   | 4 ++++
 bfd/vms-alpha.c | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 0d1d63d5fed..81d84e6fd44 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,7 @@
+2020-11-09  Alan Modra  <amodra@gmail.com>
+
+	* vms-alpha.c (alpha_vms_write_exec): Write 16 bits to eihd.alias.
+
 2020-11-09  Alan Modra  <amodra@gmail.com>
 
 	* archive.c (bfd_ar_hdr_from_filesystem): Use bfd_set_input_error
diff --git a/bfd/vms-alpha.c b/bfd/vms-alpha.c
index 5bf32d67803..471e0215e64 100644
--- a/bfd/vms-alpha.c
+++ b/bfd/vms-alpha.c
@@ -3252,7 +3252,7 @@ alpha_vms_write_exec (bfd *abfd)
   bfd_putl32 (16, eihd.virt_mem_block_size);
   bfd_putl32 (0, eihd.ext_fixup_off);
   bfd_putl32 (0, eihd.noopt_psect_off);
-  bfd_putl32 (-1, eihd.alias);
+  bfd_putl16 (-1, eihd.alias);
 
   /* Alloc EIHA.  */
   eiha = (struct vms_eiha *)((char *) &eihd + PRIV (file_pos));