perf_counter: Propagate inheritance failures down the fork() path
Fail fork() when we fail inheritance for some reason (-ENOMEM most likely).
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <20090525124600.324656474@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/fork.c b/kernel/fork.c
index 675e01e..c07c333 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1095,7 +1095,10 @@
/* Perform scheduler related setup. Assign this task to a CPU. */
sched_fork(p, clone_flags);
- perf_counter_init_task(p);
+
+ retval = perf_counter_init_task(p);
+ if (retval)
+ goto bad_fork_cleanup_policy;
if ((retval = audit_alloc(p)))
goto bad_fork_cleanup_policy;
@@ -1295,6 +1298,7 @@
bad_fork_cleanup_audit:
audit_free(p);
bad_fork_cleanup_policy:
+ perf_counter_exit_task(p);
#ifdef CONFIG_NUMA
mpol_put(p->mempolicy);
bad_fork_cleanup_cgroup: