Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf: Fix task_struct reference leak
  perf: Fix task context scheduling
  perf: mmap 512 kiB by default
  perf: Rebase max unprivileged mlock threshold on top of page size
  perf tools: Fix NO_NEWT=1 python build error
  perf symbols: Properly align symbol_conf.priv_size
  perf tools: Emit clearer message for sys_perf_event_open ENOENT return
  perf tools: Fixup exit path when not able to open events
  perf symbols: Fix vsyscall symbol lookup
  oprofile, x86: Allow setting EDGE/INV/CMASK for counter events

1 files changed, 7 insertions, 2 deletions

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index c75925c4d1e2..27960f114efd 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -145,8 +145,8 @@ static struct srcu_struct pmus_srcu;
  */
 int sysctl_perf_event_paranoid __read_mostly = 1;
 
-/* Minimum for 128 pages + 1 for the user control page */
-int sysctl_perf_event_mlock __read_mostly = 516; /* 'free' kb per user */
+/* Minimum for 512 kiB + 1 user control page */
+int sysctl_perf_event_mlock __read_mostly = 512 + (PAGE_SIZE / 1024); /* 'free' kiB per user */
 
 /*
  * max perf event sample rate
@@ -6531,6 +6531,11 @@ SYSCALL_DEFINE5(perf_event_open,
                 goto err_alloc;
         }
 
+        if (task) {
+                put_task_struct(task);
+                task = NULL;
+        }
+
         /*
          * Look up the group leader (we will attach this event to it):
          */