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[binutils-gdb] Fix ld uninitialized read of script ASSERT data structure
- From: Alan Modra <amodra at sourceware dot org>
- To: bfd-cvs at sourceware dot org
- Date: 7 Mar 2017 02:28:14 -0000
- Subject: [binutils-gdb] Fix ld uninitialized read of script ASSERT data structure
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=d933941d6c5ce5b2dcaaa869919b6f3de06b725d
commit d933941d6c5ce5b2dcaaa869919b6f3de06b725d
Author: Alan Modra <amodra@gmail.com>
Date: Tue Mar 7 12:20:00 2017 +1030
Fix ld uninitialized read of script ASSERT data structure
lang_assignment_statement serves both assignments and asserts.
* ldlang.c (open_input_bfds): Check that lang_assignment_statement
is not an assert before referencing defsym.
Diff:
---
ld/ChangeLog | 5 +++++
ld/ldlang.c | 3 ++-
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/ld/ChangeLog b/ld/ChangeLog
index cbe44a2..3883bcb 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,8 @@
+2017-03-07 Alan Modra <amodra@gmail.com>
+
+ * ldlang.c (open_input_bfds): Check that lang_assignment_statement
+ is not an assert before referencing defsym.
+
2017-03-05 Alan Modra <amodra@gmail.com>
* testsuite/ld-elf/eh3.d: Adjust for eh_frame alignment change.
diff --git a/ld/ldlang.c b/ld/ldlang.c
index 1396c5b..ff6ef39 100644
--- a/ld/ldlang.c
+++ b/ld/ldlang.c
@@ -3374,7 +3374,8 @@ open_input_bfds (lang_statement_union_type *s, enum open_bfd_mode mode)
#endif
break;
case lang_assignment_statement_enum:
- if (s->assignment_statement.exp->assign.defsym)
+ if (s->assignment_statement.exp->type.node_class != etree_assert
+ && s->assignment_statement.exp->assign.defsym)
/* This is from a --defsym on the command line. */
exp_fold_tree_no_dot (s->assignment_statement.exp);
break;