Commit-ID: 1f4ee5038f0c1ef95f8e6d47ad6623e006b5bce1
Gitweb: http://git.kernel.org/tip/1f4ee5038f0c1ef95f8e6d47ad6623e006b5bce1
Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
AuthorDate: Tue, 6 May 2014 09:59:34 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 7 May 2014 13:44:17 +0200
perf: Ensure consistent inherit state in groups
Make sure all events in a group have the same inherit state. It was
possible for group leaders to have inherit set while sibling events
would not have inherit set.
In this case we'd still inherit the siblings, leading to some
non-fatal weirdness.
Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Vince Weaver <vincent.weaver@xxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-r32tt8yldvic3jlcghd3g35u@xxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/events/core.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 09866a3..1de0d70 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -7081,20 +7081,26 @@ SYSCALL_DEFINE5(perf_event_open,
}
}
+ if (task && group_leader &&
+ group_leader->attr.inherit != attr.inherit) {
+ err = -EINVAL;
+ goto err_task;
+ }
+
get_online_cpus();
event = perf_event_alloc(&attr, cpu, task, group_leader, NULL,
NULL, NULL);
if (IS_ERR(event)) {
err = PTR_ERR(event);
- goto err_task;
+ goto err_cpus;
}
if (flags & PERF_FLAG_PID_CGROUP) {
err = perf_cgroup_connect(pid, event, &attr, group_leader);
if (err) {
__free_event(event);
- goto err_task;
+ goto err_cpus;
}
}
@@ -7256,8 +7262,9 @@ err_context:
put_ctx(ctx);
err_alloc:
free_event(event);
-err_task:
+err_cpus:
put_online_cpus();
+err_task:
if (task)
put_task_struct(task);
err_group_fd:
--
To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|