Merge branch 'slurm-2.4' into slurm-2.5

NEWS

@@ -715,6 +715,8 @@ documents those changes that are of interest to users and admins.
     a reconfiguration, the node's bitmap was not cleared resulting in an
     underflow upon job termination or removal from scheduling matrix by the
     backfill scheduler.
+ -- Fix race condition in job dependency logic which can result in invalid
+    memory reference.
 
 * Changes in SLURM 2.3.5
 ========================

src/slurmctld/job_scheduler.c

@@ -1653,6 +1653,9 @@ static bool _scan_depend(List dependency_list, uint32_t job_id)
 			continue;
 		if (dep_ptr->job_id == job_id)
 			rc = true;
+		else if ((dep_ptr->job_id != dep_ptr->job_ptr->job_id) ||
+			 (dep_ptr->job_ptr->magic != JOB_MAGIC))
+			continue;	/* purged job, ptr not yet cleared */
 		else if (dep_ptr->job_ptr->details &&
 			 dep_ptr->job_ptr->details->depend_list) {
 			rc = _scan_depend(dep_ptr->job_ptr->details->