101 lines
3.3 KiB
Diff
101 lines
3.3 KiB
Diff
From e6ff24e70ac8055d866eab588c9dfa7dc60adc93 Mon Sep 17 00:00:00 2001
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From: Tony Cook <tony@develop-help.com>
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Date: Mon, 21 Jan 2019 11:41:03 +1100
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Subject: [PATCH] (perl #133782) set magic when changing $^R
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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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The regexp engine sets and restores $^R in a few places, but didn't
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mg_set() (SvSETMAGIC()) it at all.
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Calls to length() on $^R, both within regexp code blocks and on
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a successful match could add utf8 length magic to $^R, and modifying
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$^R without mg_set() could leave now invalid length magic.
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Petr Písař: Ported to 5.28.1 from upstream's
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d4c456e337e653ae11876241727b563a684dffe7.
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Signed-off-by: Petr Písař <ppisar@redhat.com>
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---
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regexec.c | 17 +++++++++++++----
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t/re/pat.t | 10 +++++++++-
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2 files changed, 22 insertions(+), 5 deletions(-)
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diff --git a/regexec.c b/regexec.c
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index 201d9aa..830a16a 100644
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--- a/regexec.c
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+++ b/regexec.c
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@@ -7319,8 +7319,11 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
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PL_op = NULL;
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re_sv = NULL;
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- if (logical == 0) /* (?{})/ */
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- sv_setsv(save_scalar(PL_replgv), ret); /* $^R */
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+ if (logical == 0) { /* (?{})/ */
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+ SV *replsv = save_scalar(PL_replgv);
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+ sv_setsv(replsv, ret); /* $^R */
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+ SvSETMAGIC(replsv);
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+ }
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else if (logical == 1) { /* /(?(?{...})X|Y)/ */
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sw = cBOOL(SvTRUE_NN(ret));
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logical = 0;
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@@ -7495,9 +7498,13 @@ S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog)
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{
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/* preserve $^R across LEAVE's. See Bug 121070. */
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SV *save_sv= GvSV(PL_replgv);
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+ SV *replsv;
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SvREFCNT_inc(save_sv);
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regcpblow(ST.cp); /* LEAVE in disguise */
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- sv_setsv(GvSV(PL_replgv), save_sv);
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+ /* don't move this initialization up */
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+ replsv = GvSV(PL_replgv);
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+ sv_setsv(replsv, save_sv);
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+ SvSETMAGIC(replsv);
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SvREFCNT_dec(save_sv);
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}
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cur_eval = ST.prev_eval;
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@@ -9012,8 +9019,10 @@ NULL
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* see code related to PL_replgv elsewhere in this file.
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* Yves
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*/
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- if (oreplsv != GvSV(PL_replgv))
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+ if (oreplsv != GvSV(PL_replgv)) {
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sv_setsv(oreplsv, GvSV(PL_replgv));
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+ SvSETMAGIC(oreplsv);
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+ }
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}
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result = 1;
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goto final_exit;
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diff --git a/t/re/pat.t b/t/re/pat.t
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index 1d98fe7..a96bf56 100644
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--- a/t/re/pat.t
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+++ b/t/re/pat.t
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@@ -23,7 +23,7 @@ BEGIN {
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skip_all('no re module') unless defined &DynaLoader::boot_DynaLoader;
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skip_all_without_unicode_tables();
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-plan tests => 848; # Update this when adding/deleting tests.
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+plan tests => 849; # Update this when adding/deleting tests.
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run_tests() unless caller;
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@@ -1947,6 +1947,14 @@ EOP
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{ # [perl $132164]
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fresh_perl_is('m m0*0+\Rm', "",{},"Undefined behavior in address sanitizer");
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}
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+ { # [perl #133782]
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+ # this would panic on DEBUGGING builds
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+ fresh_perl_is(<<'CODE', "ok\nok\n",{}, 'Bad length magic was left on $^R');
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+while( "\N{U+100}bc" =~ /(..?)(?{$^N})/g ) {
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+ print "ok\n" if length($^R)==length("$^R");
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+}
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+CODE
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+ }
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} # End of sub run_tests
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--
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2.20.1
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