[OE-core] [zeus][PATCH] binutils: fix CVE-2019-17450
Khem Raj
raj.khem at gmail.com
Fri Oct 25 09:33:45 UTC 2019
On Fri, Oct 25, 2019 at 2:02 AM Trevor Gamblin <trevor.gamblin at windriver.com>
wrote:
> Backport upstream fix to zeus.
>
> Signed-off-by: Trevor Gamblin <trevor.gamblin at windriver.com>
> ---
> .../binutils/binutils-2.32.inc | 1 +
> ...erflow-in-function-find_abstract_ins.patch | 99 +++++++++++++++++++
> 2 files changed, 100 insertions(+)
> create mode 100644
> meta/recipes-devtools/binutils/binutils/0001-PR25078-stack-overflow-in-function-find_abstract_ins.patch
>
> diff --git a/meta/recipes-devtools/binutils/binutils-2.32.inc
> b/meta/recipes-devtools/binutils/binutils-2.32.inc
> index 19baf8a883..48940fd3e5 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://0001-PR25078-stack-overflow-in-function-find_abstract_ins.patch \
Please retain the CVE patch naming convention
> "
> S = "${WORKDIR}/git"
>
> diff --git
> a/meta/recipes-devtools/binutils/binutils/0001-PR25078-stack-overflow-in-function-find_abstract_ins.patch
> b/meta/recipes-devtools/binutils/binutils/0001-PR25078-stack-overflow-in-function-find_abstract_ins.patch
> new file mode 100644
> index 0000000000..a6ce0b9a8a
> --- /dev/null
> +++
> b/meta/recipes-devtools/binutils/binutils/0001-PR25078-stack-overflow-in-function-find_abstract_ins.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
> +
> --
> 2.23.0
>
> --
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core at lists.openembedded.org
> http://lists.openembedded.org/mailman/listinfo/openembedded-core
>
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