From FEDORA_PATCHES Mon Sep 17 00:00:00 2001

From: Fedora GDB patches <invalid@email.com>

Date: Fri, 27 Oct 2017 21:07:50 +0200

Subject: gdb-moribund-utrace-workaround.patch

;; Workaround non-stop moribund locations exploited by kernel utrace (BZ 590623).

;;=push+jan: Currently it is still not fully safe.

https://bugzilla.redhat.com/show_bug.cgi?id=590623

http://sources.redhat.com/bugzilla/show_bug.cgi?id=11593

Bug in FSF GDB exploited by the ptrace-on-utrace interaction.

diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c

--- a/gdb/breakpoint.c

+++ b/gdb/breakpoint.c

@@ -12016,6 +12016,8 @@ update_global_location_list (enum ugll_insert_mode insert_mode)

 		 traps we can no longer explain.  */

 	      old_loc->events_till_retirement = 3 * (thread_count () + 1);

+	      /* Red Hat Bug 590623.  */

+	      old_loc->events_till_retirement *= 10;

 	      old_loc->owner = NULL;

 	      VEC_safe_push (bp_location_p, moribund_locations, old_loc);