diff --git a/ltrace-0.6.0-selinux.patch b/ltrace-0.6.0-selinux.patch
new file mode 100644
index 0000000..9dc7449
--- /dev/null
+++ b/ltrace-0.6.0-selinux.patch
@@ -0,0 +1,120 @@
+From cec06ec8282c538a40bde968ae36fe8356daffaa Mon Sep 17 00:00:00 2001
+From: Petr Machata <pmachata@redhat.com>
+Date: Tue, 10 Apr 2012 13:31:55 +0200
+Subject: [PATCH] Warn when we fail to trace and SELinux boolean deny_ptrace
+ is in effect
+
+---
+ ChangeLog                 |    7 ++++++
+ common.h                  |    4 +++
+ configure.ac              |    5 ++++
+ proc.c                    |    1 +
+ sysdeps/linux-gnu/trace.c |   51 ++++++++++++++++++++++++++++++++++++--------
+ 5 files changed, 58 insertions(+), 10 deletions(-)
+
+diff --git a/common.h b/common.h
+index fa80076..2399e29 100644
+--- a/common.h
++++ b/common.h
+@@ -359,2 +359,6 @@ extern int linkmap_init(Process *, struct ltelf *);
+ 
++/* Called when trace_me or primary trace_pid fail.  This may plug in
++ * any platform-specific knowledge of why it could be so.  */
++void trace_fail_warning(pid_t pid);
++
+ 
+diff --git a/configure.ac b/configure.ac
+index 7fcfda5..42d6158 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -82,6 +82,11 @@ AC_CHECK_LIB([supc++], [__cxa_demangle], [
+ AC_SUBST(libsupcxx_LIBS)
+ 
+ 
++dnl Check security_get_boolean_active availability.
++AC_CHECK_HEADERS(selinux/selinux.h)
++AC_CHECK_LIB(selinux, security_get_boolean_active)
++
++
+ # HAVE_LIBUNWIND
+ AC_ARG_WITH(libunwind,
+   AS_HELP_STRING([--with-libunwind], [Use libunwind frame unwinding support]),
+diff --git a/proc.c b/proc.c
+index 106b6a0..ded0c95 100644
+--- a/proc.c
++++ b/proc.c
+@@ -94,6 +94,7 @@ open_pid(pid_t pid)
+ 	if (open_one_pid(pid)) {
+ 		fprintf(stderr, "Cannot attach to pid %u: %s\n",
+ 			pid, strerror(errno));
++		trace_fail_warning(pid);
+ 		return;
+ 	}
+ 
+diff --git a/sysdeps/linux-gnu/trace.c b/sysdeps/linux-gnu/trace.c
+index 67e1f93..82a4154 100644
+--- a/sysdeps/linux-gnu/trace.c
++++ b/sysdeps/linux-gnu/trace.c
+@@ -10,2 +10,7 @@
+ 
++#include "config.h"
++#ifdef HAVE_LIBSELINUX
++# include <selinux/selinux.h>
++#endif
++
+ /* If the system headers did not provide the constants, hard-code the normal
+@@ -69,10 +75,32 @@ umovelong (Process *proc, void *addr, long *result, arg_type_info *info) {
+ #endif
+ 
+ void
+-trace_me(void) {
++trace_fail_warning(pid_t pid)
++{
++	/* This was adapted from GDB.  */
++#ifdef HAVE_LIBSELINUX
++	static int checked = 0;
++	if (checked)
++		return;
++	checked = 1;
++
++	/* -1 is returned for errors, 0 if it has no effect, 1 if
++	 * PTRACE_ATTACH is forbidden.  */
++	if (security_get_boolean_active("deny_ptrace") == 1)
++		fprintf(stderr,
++"The SELinux boolean 'deny_ptrace' is enabled, which may prevent ltrace from\n"
++"tracing other processes.  You can disable this process attach protection by\n"
++"issuing 'setsebool deny_ptrace=0' in the superuser context.\n");
++#endif /* HAVE_LIBSELINUX */
++}
++
++void
++trace_me(void)
++{
+ 	debug(DEBUG_PROCESS, "trace_me: pid=%d", getpid());
+ 	if (ptrace(PTRACE_TRACEME, 0, 1, 0) < 0) {
+ 		perror("PTRACE_TRACEME");
++		trace_fail_warning(getpid());
+ 		exit(1);
+ 	}
+ }
+@@ -101,11 +129,14 @@ I'll now try to proceed with tracing, but this shouldn't be happening.\n");
+ }
+ 
+ int
+-trace_pid(pid_t pid) {
++trace_pid(pid_t pid)
++{
+ 	debug(DEBUG_PROCESS, "trace_pid: pid=%d", pid);
+-	if (ptrace(PTRACE_ATTACH, pid, 1, 0) < 0) {
++	/* This shouldn't emit error messages, as there are legitimate
++	 * reasons that the PID can't be attached: like it may have
++	 * already ended.  */
++	if (ptrace(PTRACE_ATTACH, pid, 1, 0) < 0)
+ 		return -1;
+-	}
+ 
+ 	/* man ptrace: PTRACE_ATTACH attaches to the process specified
+ 	   in pid.  The child is sent a SIGSTOP, but will not
+-- 
+1.7.7.6
+
diff --git a/ltrace.spec b/ltrace.spec
index 5077cef..95e4604 100644
--- a/ltrace.spec
+++ b/ltrace.spec
@@ -1,7 +1,7 @@
 Summary: Tracks runtime library calls from dynamically linked executables
 Name: ltrace
 Version: 0.6.0
-Release: 5%{?dist}
+Release: 6%{?dist}
 URL: http://ltrace.alioth.debian.org/
 License: GPLv2+
 Group: Development/Debuggers
@@ -28,6 +28,7 @@ Patch10: ltrace-0.6.0-ppc-shift.patch
 Patch11: ltrace-0.6.0-vfork.patch
 Patch12: ltrace-0.6.0-thread-races.patch
 Patch13: ltrace-0.6.0-process-start.patch
+Patch14: ltrace-0.6.0-selinux.patch
 
 %description
 Ltrace is a debugging program which runs a specified command until the
@@ -54,6 +55,7 @@ execution of processes.
 %patch11 -p1
 %patch12 -p1
 %patch13 -p1
+%patch14 -p1
 sed -i -e 's/-o root -g root//' Makefile.in
 
 %build
@@ -86,6 +88,11 @@ rm -rf $RPM_BUILD_ROOT
 %config(noreplace) %{_sysconfdir}/ltrace.conf
 
 %changelog
+* Tue Apr 10 2012 Petr Machata <pmachata@redhat.com> - 0.6.0-6
+- If we fail to attach to traced process, check whether deny_ptrace
+  isn't enabled.  If yes, warn about it.
+- Resolves: #810973
+
 * Tue Feb  7 2012 Petr Machata <pmachata@redhat.com> - 0.6.0-5
 - Add upstream patches for initial breakpoint insertion.  This mostly
   fixes tracing on PPC.