Merge branch 'perf-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'perf-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf: Fix NULL deref in inheritance code
  perf: Pass appropriate frame pointer to dump_trace()

2 files changed, 3 insertions, 4 deletions

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index c223b7e895d9..d616c06e99b4 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -2347,7 +2347,7 @@ perf_callchain_kernel(struct pt_regs *regs, struct perf_callchain_entry *entry)
         callchain_store(entry, PERF_CONTEXT_KERNEL);
         callchain_store(entry, regs->ip);
 
-        dump_trace(NULL, regs, NULL, 0, &backtrace_ops, entry);
+        dump_trace(NULL, regs, NULL, regs->bp, &backtrace_ops, entry);
 }
 
 /*
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 1f38270f08c7..603c0d8b5df1 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -5148,7 +5148,7 @@ int perf_event_init_task(struct task_struct *child)
                                             GFP_KERNEL);
                         if (!child_ctx) {
                                 ret = -ENOMEM;
-                                goto exit;
+                                break;
                         }
 
                         __perf_event_init_context(child_ctx, child);
@@ -5164,7 +5164,7 @@ int perf_event_init_task(struct task_struct *child)
                 }
         }
 
-        if (inherited_all) {
+        if (child_ctx && inherited_all) {
                 /*
                  * Mark the child context as a clone of the parent
                  * context, or of whatever the parent is a clone of.
@@ -5184,7 +5184,6 @@ int perf_event_init_task(struct task_struct *child)
                 get_ctx(child_ctx->parent_ctx);
         }
 
-exit:
         mutex_unlock(&parent_ctx->mutex);
 
         perf_unpin_context(parent_ctx);