Fix hang on fork

If e.g. a signal is being received while we are running fork(), the signal
thread may be having our SS lock when we make the space copy, and thus in the
child we can not take the SS lock any more.

* sysdeps/mach/hurd/fork.c (__fork): Lock SS->lock around __proc_dostop call.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 23c900dcf7..eb604b854b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2014-08-28  Samuel Thibault  <samuel.thibault@ens-lyon.org>
+
+	* sysdeps/mach/hurd/fork.c (__fork): Lock SS->lock around
+	__proc_dostop call.
+
 2014-08-27  Mark Wielaard  <mjw@redhat.com>
 
 	[BZ #17319]