[oe-commits] [openembedded-core] 01/07: binutils: fix CVE-2019-17450

[git at git.openembedded.org]

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rpurdie pushed a commit to branch zeus
in repository openembedded-core.

commit 8b33aeb4122be31b2aed29e40dcac01ea4643b63
Author: Trevor Gamblin <trevor.gamblin at windriver.com>
AuthorDate: Mon Nov 18 07:23:31 2019 +0800

    binutils: fix CVE-2019-17450
    
    Backport upstream fix. No upstream release version of
    binutils it yet, so backport the fix independently.
    
    (From OE-Core rev: a4ead72b958ded4941f96741029f4955930ba758)
    
    Signed-off-by: Trevor Gamblin <trevor.gamblin at windriver.com>
    Signed-off-by: Ross Burton <ross.burton at intel.com>
    Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
    Signed-off-by: Anuj Mittal <anuj.mittal at intel.com>
    Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 meta/recipes-devtools/binutils/binutils-2.32.inc   |  1 +
 .../binutils/binutils/CVE-2019-17450.patch         | 99 ++++++++++++++++++++++
 2 files changed, 100 insertions(+)

diff --git a/meta/recipes-devtools/binutils/binutils-2.32.inc b/meta/recipes-devtools/binutils/binutils-2.32.inc
index 19baf8a..1e96cf4 100644
--- a/meta/recipes-devtools/binutils/binutils-2.32.inc
+++ b/meta/recipes-devtools/binutils/binutils-2.32.inc
@@ -49,6 +49,7 @@ SRC_URI = "\
      file://CVE-2019-12972.patch \
      file://CVE-2019-14250.patch \
      file://CVE-2019-14444.patch \
+     file://CVE-2019-17450.patch \
 "
 S  = "${WORKDIR}/git"
 
diff --git a/meta/recipes-devtools/binutils/binutils/CVE-2019-17450.patch b/meta/recipes-devtools/binutils/binutils/CVE-2019-17450.patch
new file mode 100644
index 0000000..a6ce0b9
--- /dev/null
+++ b/meta/recipes-devtools/binutils/binutils/CVE-2019-17450.patch
@@ -0,0 +1,99 @@
+From 09dd135df9ebc7a4b640537e23e26a03a288a789 Mon Sep 17 00:00:00 2001
+From: Alan Modra <amodra at gmail.com>
+Date: Wed, 9 Oct 2019 00:07:29 +1030
+Subject: [PATCH] PR25078, stack overflow in function find_abstract_instance
+
+Selectively backporting fix for bfd/dwarf2.c, but not the ChangeLog
+file. There are newer versions of binutils, but none of them contain the
+commit fixing CVE-2019-17450, so backport it to master and zeus.
+
+Upstream-Status: Backport [https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=063c511bd79]
+CVE: CVE-2019-17450
+Signed-off-by: Trevor Gamblin <trevor.gamblin at windriver.com>
+
+	PR 25078
+	* dwarf2.c (find_abstract_instance): Delete orig_info_ptr, add
+	recur_count.  Error on recur_count reaching 100 rather than
+	info_ptr matching orig_info_ptr.  Adjust calls.
+
+---
+ bfd/dwarf2.c | 35 +++++++++++++++++------------------
+ 1 file changed, 17 insertions(+), 18 deletions(-)
+
+diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c
+index 0b4e485582..20ec9e2e56 100644
+--- a/bfd/dwarf2.c
++++ b/bfd/dwarf2.c
+@@ -2803,13 +2803,13 @@ lookup_symbol_in_variable_table (struct comp_unit *unit,
+ }
+ 
+ static bfd_boolean
+-find_abstract_instance (struct comp_unit *   unit,
+-			bfd_byte *           orig_info_ptr,
+-			struct attribute *   attr_ptr,
+-			const char **        pname,
+-			bfd_boolean *        is_linkage,
+-			char **              filename_ptr,
+-			int *                linenumber_ptr)
++find_abstract_instance (struct comp_unit *unit,
++			struct attribute *attr_ptr,
++			unsigned int recur_count,
++			const char **pname,
++			bfd_boolean *is_linkage,
++			char **filename_ptr,
++			int *linenumber_ptr)
+ {
+   bfd *abfd = unit->abfd;
+   bfd_byte *info_ptr;
+@@ -2820,6 +2820,14 @@ find_abstract_instance (struct comp_unit *   unit,
+   struct attribute attr;
+   const char *name = NULL;
+ 
++  if (recur_count == 100)
++    {
++      _bfd_error_handler
++	(_("DWARF error: abstract instance recursion detected"));
++      bfd_set_error (bfd_error_bad_value);
++      return FALSE;
++    }
++
+   /* DW_FORM_ref_addr can reference an entry in a different CU. It
+      is an offset from the .debug_info section, not the current CU.  */
+   if (attr_ptr->form == DW_FORM_ref_addr)
+@@ -2939,15 +2947,6 @@ find_abstract_instance (struct comp_unit *   unit,
+ 					 info_ptr, info_ptr_end);
+ 	      if (info_ptr == NULL)
+ 		break;
+-	      /* It doesn't ever make sense for DW_AT_specification to
+-		 refer to the same DIE.  Stop simple recursion.  */
+-	      if (info_ptr == orig_info_ptr)
+-		{
+-		  _bfd_error_handler
+-		    (_("DWARF error: abstract instance recursion detected"));
+-		  bfd_set_error (bfd_error_bad_value);
+-		  return FALSE;
+-		}
+ 	      switch (attr.name)
+ 		{
+ 		case DW_AT_name:
+@@ -2961,7 +2960,7 @@ find_abstract_instance (struct comp_unit *   unit,
+ 		    }
+ 		  break;
+ 		case DW_AT_specification:
+-		  if (!find_abstract_instance (unit, info_ptr, &attr,
++		  if (!find_abstract_instance (unit, &attr, recur_count + 1,
+ 					       &name, is_linkage,
+ 					       filename_ptr, linenumber_ptr))
+ 		    return FALSE;
+@@ -3175,7 +3174,7 @@ scan_unit_for_symbols (struct comp_unit *unit)
+ 
+ 		case DW_AT_abstract_origin:
+ 		case DW_AT_specification:
+-		  if (!find_abstract_instance (unit, info_ptr, &attr,
++		  if (!find_abstract_instance (unit, &attr, 0,
+ 					       &func->name,
+ 					       &func->is_linkage,
+ 					       &func->file,
+-- 
+2.23.0
+

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