Resolves: #1245712 - prevent infinite recursion in ihungetc()

zsh-5.0.8-hist-bz1245712.patch

@@ -0,0 +1,41 @@
+From d1079f66e2fa1b238fa5b8dd038cb34f5ac001d0 Mon Sep 17 00:00:00 2001
+From: Peter Stephenson <p.stephenson@samsung.com>
+Date: Wed, 22 Jul 2015 14:38:03 +0100
+Subject: [PATCH] 35854: prevent infinite recursion in ihungetc()
+
+Signed-off-by: Kamil Dudka <kdudka@redhat.com>
+---
+ Src/hist.c | 10 ++++++++--
+ 1 file changed, 8 insertions(+), 2 deletions(-)
+
+diff --git a/Src/hist.c b/Src/hist.c
+index 6725313..cf224cb 100644
+--- a/Src/hist.c
++++ b/Src/hist.c
+@@ -136,6 +136,7 @@ mod_export int hist_skip_flags;
+ #define HA_NOINC	(1<<1)	/* Don't store, curhist not incremented */
+ #define HA_INWORD       (1<<2)  /* We're inside a word, don't add
+ 				   start and end markers */
++#define HA_UNGET        (1<<3)  /* Recursively ungetting */
+ 
+ /* Array of word beginnings and endings in current history line. */
+ 
+@@ -904,8 +905,13 @@ ihungetc(int c)
+ 
+     while (!lexstop && !errflag) {
+ 	if (hptr[-1] != (char) c && stophist < 4 &&
+-	    hptr > chline + 1 && hptr[-1] == '\n' && hptr[-2] == '\\')
+-	    hungetc('\n'), hungetc('\\');
++	    hptr > chline + 1 && hptr[-1] == '\n' && hptr[-2] == '\\' &&
++	    !(histactive & HA_UNGET)) {
++	    histactive |= HA_UNGET;
++	    hungetc('\n');
++	    hungetc('\\');
++	    histactive &= ~HA_UNGET;
++	}
+ 
+ 	if (expanding) {
+ 	    zlemetacs--;
+-- 
+2.4.6
+

zsh.spec

@@ -3,7 +3,7 @@
 Summary: Powerful interactive shell
 Name: zsh
 Version: 5.0.8
-Release: 4%{?dist}
+Release: 5%{?dist}
 License: MIT
 URL: http://zsh.sourceforge.net/
 Group: System Environment/Shells
@@ -27,6 +27,9 @@ Patch3: zsh-5.0.8-comp-bz1238544.patch
 # backport completion for dnf (#1239337)
 Patch4: zsh-5.0.8-comp-dnf.patch
 
+# prevent infinite recursion in ihungetc() (#1245712)
+Patch5: zsh-5.0.8-hist-bz1245712.patch
+
 BuildRequires: coreutils sed ncurses-devel libcap-devel
 BuildRequires: texinfo texi2html gawk hostname
 Requires(post): info grep
@@ -65,6 +68,7 @@ This package contains the Zsh manual in html format.
 %patch2 -p1
 %patch3 -p1
 %patch4 -p1
+%patch5 -p1
 
 cp -p %SOURCE7 .
 
@@ -182,6 +186,9 @@ fi
 %doc Doc/*.html
 
 %changelog
+* Wed Jul 22 2015 Kamil Dudka <kdudka@redhat.com> - 5.0.8-5
+- prevent infinite recursion in ihungetc() (#1245712)
+
 * Tue Jul 07 2015 Kamil Dudka <kdudka@redhat.com> - 5.0.8-4
 - backport completion for dnf (#1239337)