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
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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