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Fix a possibly unitialized memory read in the Perl parser

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This commit is contained in:
Petr Písař 2018-04-20 12:21:00 +02:00
parent 7d51eee368
commit b09154addd
2 changed files with 78 additions and 0 deletions
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71
perl-5.27.10-PATCH-perl-133074-5.26.1-some-coverity-fixes.patch Normal file
View File

@ -0,0 +1,71 @@
From 62e6b70574842d7f2c547d33c85c50228522f685 Mon Sep 17 00:00:00 2001
From: Marc-Philip <marc-philip.werner@sap.com>
Date: Sun, 8 Apr 2018 12:15:29 -0600
Subject: [PATCH] PATCH: [perl #133074] 5.26.1: some coverity fixes
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
we have some coverity code scans here. They have found this
uninilialized variable in pp.c and the integer overrun in toke.c.
Though it might be possible that these are false positives (no
reasonable control path gets there), it's good to mute the scan here to
see the real problems easier.
Signed-off-by: Petr Písař <ppisar@redhat.com>
---
pp.c | 1 +
toke.c | 8 ++++----
2 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/pp.c b/pp.c
index 5524131658..d777ae4309 100644
--- a/pp.c
+++ b/pp.c
@@ -3727,6 +3727,7 @@ PP(pp_ucfirst)
if (! slen) { /* If empty */
need = 1; /* still need a trailing NUL */
ulen = 0;
+ *tmpbuf = '\0';
}
else if (DO_UTF8(source)) { /* Is the source utf8? */
doing_utf8 = TRUE;
diff --git a/toke.c b/toke.c
index 3405dc6c89..fc87252bb1 100644
--- a/toke.c
+++ b/toke.c
@@ -9052,7 +9052,7 @@ S_pending_ident(pTHX)
HEK * const stashname = HvNAME_HEK(stash);
SV * const sym = newSVhek(stashname);
sv_catpvs(sym, "::");
- sv_catpvn_flags(sym, PL_tokenbuf+1, tokenbuf_len - 1, (UTF ? SV_CATUTF8 : SV_CATBYTES ));
+ sv_catpvn_flags(sym, PL_tokenbuf+1, tokenbuf_len > 0 ? tokenbuf_len - 1 : 0, (UTF ? SV_CATUTF8 : SV_CATBYTES ));
pl_yylval.opval = newSVOP(OP_CONST, 0, sym);
pl_yylval.opval->op_private = OPpCONST_ENTERED;
if (pit != '&')
@@ -9080,7 +9080,7 @@ S_pending_ident(pTHX)
&& PL_lex_state != LEX_NORMAL
&& !PL_lex_brackets)
{
- GV *const gv = gv_fetchpvn_flags(PL_tokenbuf + 1, tokenbuf_len - 1,
+ GV *const gv = gv_fetchpvn_flags(PL_tokenbuf + 1, tokenbuf_len > 0 ? tokenbuf_len - 1 : 0,
( UTF ? SVf_UTF8 : 0 ) | GV_ADDMG,
SVt_PVAV);
if ((!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
@@ -9097,11 +9097,11 @@ S_pending_ident(pTHX)
/* build ops for a bareword */
pl_yylval.opval = newSVOP(OP_CONST, 0,
newSVpvn_flags(PL_tokenbuf + 1,
- tokenbuf_len - 1,
+ tokenbuf_len > 0 ? tokenbuf_len - 1 : 0,
UTF ? SVf_UTF8 : 0 ));
pl_yylval.opval->op_private = OPpCONST_ENTERED;
if (pit != '&')
- gv_fetchpvn_flags(PL_tokenbuf+1, tokenbuf_len - 1,
+ gv_fetchpvn_flags(PL_tokenbuf+1, tokenbuf_len > 0 ? tokenbuf_len - 1 : 0,
(PL_in_eval ? GV_ADDMULTI : GV_ADD)
| ( UTF ? SVf_UTF8 : 0 ),
((PL_tokenbuf[0] == '$') ? SVt_PV
--
2.14.3

7
perl.spec
View File

@ -267,6 +267,10 @@ Patch82: perl-5.27.9-fix-line-numbers-in-multi-line-s.patch
# in upstream after 5.27.10
Patch83: perl-5.27.10-PATCH-perl-132167-Parse-error-in-regex_sets.patch
# Fix a possibly unitialized memory read in the Perl parser, RT#133074,
# in upstream after 5.27.10
Patch84: perl-5.27.10-PATCH-perl-133074-5.26.1-some-coverity-fixes.patch
# Link XS modules to libperl.so with EU::CBuilder on Linux, bug #960048
Patch200: perl-5.16.3-Link-XS-modules-to-libperl.so-with-EU-CBuilder-on-Li.patch
@ -2871,6 +2875,7 @@ Perl extension for Version Objects
%patch81 -p1
%patch82 -p1
%patch83 -p1
%patch84 -p1
%patch200 -p1
%patch201 -p1
@ -2922,6 +2927,7 @@ perl -x patchlevel.h \
'Fedora Patch81: Do not clobber file bytes in :encoding layer (RT#132833)' \
'Fedora Patch82: Fix line numbers in multi-line s/// (RT#131930)' \
'Fedora Patch83: Fix parsing extended bracketed character classes (RT#132167)' \
'Fedora Patch84: Fix a possibly unitialized memory read in the Perl parser (RT#133074)' \
'Fedora Patch200: Link XS modules to libperl.so with EU::CBuilder on Linux' \
'Fedora Patch201: Link XS modules to libperl.so with EU::MM on Linux' \
%{nil}
@ -5215,6 +5221,7 @@ popd
- Do not clobber file bytes in :encoding layer (RT#132833)
- Fix line numbers in multi-line s/// (RT#131930)
- Fix parsing extended bracketed character classes (RT#132167)
- Fix a possibly unitialized memory read in the Perl parser (RT#133074)
* Mon Apr 16 2018 Petr Pisar <ppisar@redhat.com> - 4:5.26.2-411
- 5.26.2 bump