[binutils-gdb] Segmentation fault i386-gen

[Alan Modra]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=c3ffb8f340f567949f24c3bab62259f0e593637f

commit c3ffb8f340f567949f24c3bab62259f0e593637f
Author: Alan Modra <amodra@gmail.com>
Date:   Tue Jan 26 12:20:23 2021 +1030

    Segmentation fault i386-gen
    
    A case of inst->next being uninitialised.
    
            * i386-gen.c (parse_template): Ensure entire template_instance
            is initialised.

Diff:
---
 opcodes/ChangeLog  | 5 +++++
 opcodes/i386-gen.c | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index 57240f11873..ecbf005e991 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,8 @@
+2021-01-26  Alan Modra  <amodra@gmail.com>
+
+	* i386-gen.c (parse_template): Ensure entire template_instance
+	is initialised.
+
 2021-01-15  Nelson Chu  <nelson.chu@sifive.com>
 
 	* riscv-opc.c (riscv_gpr_names_abi): Aligned the code.
diff --git a/opcodes/i386-gen.c b/opcodes/i386-gen.c
index b3c87dbbd66..44cdc661985 100644
--- a/opcodes/i386-gen.c
+++ b/opcodes/i386-gen.c
@@ -1576,6 +1576,8 @@ parse_template (char *buf, int lineno)
       *end++ = '\0';
 
       inst = xmalloc (sizeof (*inst));
+      inst->next = NULL;
+      inst->args = NULL;
 
       cur = next_field (buf, ':', &next, end);
       inst->name = xstrdup (cur);