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Backport "Add a recursion limit to the demangle_const function in the Rust demangler."

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And related patches. Also fix bogus date on changelog
Resolves: RHEL-7330
This commit is contained in:
Guinevere Larsen 2023-10-10 13:51:40 +02:00
parent 14a314a859
commit 9e868de349
6 changed files with 127 additions and 1 deletions
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8
_gdb.spec.Patch.include
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@ -293,3 +293,11 @@ Patch068: gdb-backport-call-check_typedef-at-beginning-of-dwarf_expr_context.pat
# (Nick Clifton, RHBZ 2153228)
Patch069: gdb-rhbz2153228-fail-if-sh_info-is-zero.patch
# Backport Add a recursion limit to the demangle_const function in the Rust demangler.
# (Nick Clifton, RHEL-4234)
Patch070: libiberty-infinite-recursion-fix-1-of-2.patch
# Backport Fix typo in recent code to add stack recursion limit to the Rust demangler.
# (Nick Clifton)
Patch071: libiberty-infinite-recursion-fix-2-of-2.patch

2
_gdb.spec.patch.include
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@ -67,3 +67,5 @@
%patch067 -p1
%patch068 -p1
%patch069 -p1
%patch070 -p1
%patch071 -p1

2
_patch_order
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@ -67,3 +67,5 @@ gdb-backport-python-config-replace-deprecated-distutils.patch
gdb-gcc-13-backport-self-move-diagnostic-fix
gdb-backport-call-check_typedef-at-beginning-of-dwarf_expr_context.patch
gdb-rhbz2153228-fail-if-sh_info-is-zero.patch
libiberty-infinite-recursion-fix-1-of-2.patch
libiberty-infinite-recursion-fix-2-of-2.patch

8
gdb.spec
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@ -73,7 +73,7 @@ Version: 12.1
# The release always contains a leading reserved number, start it at 1.
# `upstream' is not a part of `name' to stay fully rpm dependencies compatible for the testing.
Release: 3%{?dist}
Release: 4%{?dist}
License: GPLv3+ and GPLv3+ with exceptions and GPLv2+ and GPLv2+ with exceptions and GPL+ and LGPLv2+ and LGPLv3+ and BSD and Public Domain and GFDL
# Do not provide URL for snapshots as the file lasts there only for 2 days.
@ -1205,6 +1205,12 @@ fi
%endif
%changelog
* Tue Oct 10 2023 Guinevere Larsen <blarsen@redhat.com> - 12.1-4.el9
- Backport "Fix typo in recent code to add stack recursion limit to the Rust demangler."
(Nick Clifton)
- Backport "Add a recursion limit to the demangle_const function in the Rust demangler."
(Nick Clifton, RHEL-4234)
* Tue Jun 13 2023 Keith Seitz <keiths@redhat.com> - 12.1-3.el9
- Backport "Update gdb-add-index.sh ..."
(Andrew Burgess, RHBZ 2213228)

85
libiberty-infinite-recursion-fix-1-of-2.patch Normal file
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@ -0,0 +1,85 @@
From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
From: Nick Clifton <nickc@redhat.com>
Date: Fri, 1 Jul 2022 15:58:52 +0100
Subject: libiberty-infinite-recursion-fix-1-of-2.patch
;; Backport Add a recursion limit to the demangle_const function in the Rust demangler.
;; (Nick Clifton, RHEL-4234)
libiberty/
PR demangler/105039
* rust-demangle.c (demangle_const): Add recursion limit.
diff --git a/libiberty/rust-demangle.c b/libiberty/rust-demangle.c
--- a/libiberty/rust-demangle.c
+++ b/libiberty/rust-demangle.c
@@ -126,7 +126,7 @@ parse_integer_62 (struct rust_demangler *rdm)
return 0;
x = 0;
- while (!eat (rdm, '_'))
+ while (!eat (rdm, '_') && !rdm->errored)
{
c = next (rdm);
x *= 62;
@@ -1148,6 +1148,15 @@ demangle_const (struct rust_demangler *rdm)
if (rdm->errored)
return;
+ if (rdm->recursion != RUST_NO_RECURSION_LIMIT)
+ {
+ ++ rdm->recursion;
+ if (rdm->recursion > RUST_MAX_RECURSION_COUNT)
+ /* FIXME: There ought to be a way to report
+ that the recursion limit has been reached. */
+ goto fail_return;
+ }
+
if (eat (rdm, 'B'))
{
backref = parse_integer_62 (rdm);
@@ -1158,7 +1167,7 @@ demangle_const (struct rust_demangler *rdm)
demangle_const (rdm);
rdm->next = old_next;
}
- return;
+ goto pass_return;
}
ty_tag = next (rdm);
@@ -1167,7 +1176,7 @@ demangle_const (struct rust_demangler *rdm)
/* Placeholder. */
case 'p':
PRINT ("_");
- return;
+ goto pass_return;
/* Unsigned integer types. */
case 'h':
@@ -1200,18 +1209,20 @@ demangle_const (struct rust_demangler *rdm)
break;
default:
- rdm->errored = 1;
- return;
+ goto fail_return;
}
- if (rdm->errored)
- return;
-
- if (rdm->verbose)
+ if (!rdm->errored && rdm->verbose)
{
PRINT (": ");
PRINT (basic_type (ty_tag));
}
+
+ fail_return:
+ rdm->errored = 1;
+ pass_return:
+ if (rdm->recursion != RUST_NO_RECURSION_LIMIT)
+ -- rdm->recursion;
}
static void

23
libiberty-infinite-recursion-fix-2-of-2.patch Normal file
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@ -0,0 +1,23 @@
From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
From: Nick Clifton <nickc@redhat.com>
Date: Mon, 4 Jul 2022 16:31:18 +0100
Subject: libiberty-infinite-recursion-fix-2-of-2.patch
;; Backport Fix typo in recent code to add stack recursion limit to the Rust demangler.
;; (Nick Clifton)
libiberty
* rust-demangle.c (demangle_const): Add a missing goto pass_return
at the end of the function.
diff --git a/libiberty/rust-demangle.c b/libiberty/rust-demangle.c
--- a/libiberty/rust-demangle.c
+++ b/libiberty/rust-demangle.c
@@ -1217,6 +1217,7 @@ demangle_const (struct rust_demangler *rdm)
PRINT (": ");
PRINT (basic_type (ty_tag));
}
+ goto pass_return;
fail_return:
rdm->errored = 1;