Fix stack handling when calling chdir without an argument
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From 36dc786e5ea4a6d3e85f1f55251b8538fabb8321 Mon Sep 17 00:00:00 2001
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From: Tony Cook <tony@develop-help.com>
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Date: Mon, 5 Sep 2016 15:40:11 +1000
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Subject: [PATCH] (perl #129130) make chdir allocate the stack it needs
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Ported to 5.22.2:
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commit 92c843fb4b4e1a1e0ac7ec0fe198dc77266838da
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Author: Tony Cook <tony@develop-help.com>
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Date: Mon Sep 5 15:40:11 2016 +1000
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(perl #129130) make chdir allocate the stack it needs
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chdir with no argument didn't ensure there was stack space available
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for its result.
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Signed-off-by: Petr Písař <ppisar@redhat.com>
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---
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pp_sys.c | 1 +
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t/op/chdir.t | 8 +++++++-
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2 files changed, 8 insertions(+), 1 deletion(-)
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diff --git a/pp_sys.c b/pp_sys.c
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index 1285c75..2171a1a 100644
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--- a/pp_sys.c
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+++ b/pp_sys.c
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@@ -3580,6 +3580,7 @@ PP(pp_chdir)
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HV * const table = GvHVn(PL_envgv);
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SV **svp;
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+ EXTEND(SP, 1);
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if ( (svp = hv_fetchs(table, "HOME", FALSE))
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|| (svp = hv_fetchs(table, "LOGDIR", FALSE))
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#ifdef VMS
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diff --git a/t/op/chdir.t b/t/op/chdir.t
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index 813b0ed..f16be41 100644
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--- a/t/op/chdir.t
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+++ b/t/op/chdir.t
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@@ -10,7 +10,7 @@ BEGIN {
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# possibilities into @INC.
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unshift @INC, qw(t . lib ../lib);
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require "./test.pl";
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- plan(tests => 48);
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+ plan(tests => 49);
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}
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use Config;
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@@ -176,6 +176,12 @@ WARNING
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}
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}
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+fresh_perl_is(<<'EOP', '', { stderr => 1 }, "check stack handling");
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+for $x (map $_+1, 1 .. 100) {
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+ map chdir, 1 .. $x;
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+}
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+EOP
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+
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my %Saved_Env = ();
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sub clean_env {
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foreach my $env (@magic_envs) {
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--
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2.7.4
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@ -143,6 +143,9 @@ Patch45: perl-5.22.2-regcomp.c-fix-perl-129950-fix-firstchar-bitmap-under
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# RT#130001, in upstream after 5.25.6
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Patch46: perl-5.25.6-perl-130001-h2xs-avoid-infinite-loop-for-enums.patch
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# Fix stack handling when calling chdir without an argument, RT#129130
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Patch47: perl-5.22.2-perl-129130-make-chdir-allocate-the-stack-it-needs.patch
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# Link XS modules to libperl.so with EU::CBuilder on Linux, bug #960048
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Patch200: perl-5.16.3-Link-XS-modules-to-libperl.so-with-EU-CBuilder-on-Li.patch
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@ -2202,6 +2205,7 @@ Perl extension for Version Objects
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%patch44 -p1
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%patch45 -p1
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%patch46 -p1
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%patch47 -p1
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%patch200 -p1
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%patch201 -p1
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@ -2240,6 +2244,7 @@ perl -x patchlevel.h \
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'Fedora Patch44: Fix parsing perl options in shell bang line (RT#129336)' \
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'Fedora Patch45: Fix firstchar bitmap under UTF-8 with prefix optimization (RT#129950)' \
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'Fedora Patch46: Avoid infinite loop in h2xs tool if enum and type have the same name (RT130001)' \
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'Fedora Patch47: Fix stack handling when calling chdir without an argument (RT#129130)' \
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'Fedora Patch200: Link XS modules to libperl.so with EU::CBuilder on Linux' \
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'Fedora Patch201: Link XS modules to libperl.so with EU::MM on Linux' \
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%{nil}
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@ -4264,6 +4269,7 @@ popd
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- Fix firstchar bitmap under UTF-8 with prefix optimization (RT#129950)
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- Avoid infinite loop in h2xs tool if enum and type have the same name
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(RT130001)
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- Fix stack handling when calling chdir without an argument (RT#129130)
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* Wed Aug 03 2016 Jitka Plesnikova <jplesnik@redhat.com> - 4:5.22.2-354
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- Avoid loading optional modules from default . (CVE-2016-1238)
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