fix deadlock in trap, backported from devel branch

Signed-off-by: Roman Rakus <rrakus@redhat.com>

bash-4.2-trap.patch

@@ -0,0 +1,60 @@
+commit 41d203e21f94c1b8bfc457606ee633c22da3cf04
+Author: Chet Ramey <chet.ramey@case.edu>
+Date:   Wed Jun 12 09:29:51 2013 -0400
+
+    commit bash-20130523 snapshot
+
+diff --git a/trap.c b/trap.c
+index 1e11d1f..da59b26 100644
+--- a/trap.c
++++ b/trap.c
+@@ -286,6 +286,9 @@ run_pending_traps ()
+   if (catch_flag == 0)		/* simple optimization */
+     return;
+ 
++  if (running_trap > 0)
++    return;			/* no recursive trap invocations */
++
+   catch_flag = trapped_signal_received = 0;
+ 
+   /* Preserve $? when running trap. */
+@@ -304,6 +307,8 @@ run_pending_traps ()
+ 
+ 	  BLOCK_SIGNAL (sig, set, oset);
+ 
++	  running_trap = sig + 1;
++
+ 	  if (sig == SIGINT)
+ 	    {
+ 	      run_interrupt_trap ();
+@@ -324,6 +329,7 @@ run_pending_traps ()
+ 	    {
+ 	      /* This can happen when run_pending_traps is called while
+ 		 running a SIGCHLD trap handler. */
++	      running_trap = 0;
+ 	      UNBLOCK_SIGNAL (oset);
+ 	      continue;					/* XXX */
+ 	    }
+@@ -359,7 +365,14 @@ run_pending_traps ()
+ 	      save_subst_varlist = subst_assign_varlist;
+ 	      subst_assign_varlist = 0;
+ 
++#if defined (JOB_CONTROL)
++	      save_pipeline (1);	/* XXX only provides one save level */
++#endif
+ 	      evalstring (savestring (trap_list[sig]), "trap", SEVAL_NONINT|SEVAL_NOHIST|SEVAL_RESETLINE);
++#if defined (JOB_CONTROL)
++	      restore_pipeline (1);
++#endif
++
+ 	      restore_token_state (token_state);
+ 	      free (token_state);
+ 
+@@ -367,6 +380,7 @@ run_pending_traps ()
+ 	    }
+ 
+ 	  pending_traps[sig] = 0;
++	  running_trap = 0;
+ 
+ 	  UNBLOCK_SIGNAL (oset);
+ 	}

bash.spec

@@ -6,7 +6,7 @@
 Version: %{baseversion}%{patchleveltag}
 Name: bash
 Summary: The GNU Bourne Again shell
-Release: 1%{?dist}
+Release: 2%{?dist}
 Group: System Environment/Shells
 License: GPLv3+
 Url: http://www.gnu.org/software/bash
@@ -115,6 +115,9 @@ Patch125: bash-4.2-size_type.patch
 # 903833, Fix missing close(), fixes fd leaks
 Patch126: bash-4.2-missing_closes.patch
 
+# fix deadlock in trap, backported from devel branch
+Patch127: bash-4.2-trap.patch
+
 BuildRequires: texinfo bison
 BuildRequires: ncurses-devel
 BuildRequires: autoconf, gettext
@@ -408,6 +411,10 @@ end
 #%doc doc/*.ps doc/*.0 doc/*.html doc/article.txt
 
 %changelog
+* Thu Jun 27 2013 Roman Rakus <rrakus@redhat.com> - 4.2.45-2
+- Fixed a bug that caused trap handlers to be executed recursively,
+  corrupting internal data structures.
+
 * Mon Mar 11 2013 Roman Rakus <rrakus@redhat.com> - 4.2.45-1
 - Patchlevel 45