1 files changed, 13 insertions, 6 deletions

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 42b9355033d4..44004d8aa3b3 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -6598,7 +6598,7 @@ tracing_buffers_read(struct file *filp, char __user *ubuf,
 {
         struct ftrace_buffer_info *info = filp->private_data;
         struct trace_iterator *iter = &info->iter;
-        ssize_t ret;
+        ssize_t ret = 0;
         ssize_t size;
 
         if (!count)
@@ -6612,10 +6612,15 @@ tracing_buffers_read(struct file *filp, char __user *ubuf,
         if (!info->spare) {
                 info->spare = ring_buffer_alloc_read_page(iter->trace_buffer->buffer,
                                                           iter->cpu_file);
-                info->spare_cpu = iter->cpu_file;
+                if (IS_ERR(info->spare)) {
+                        ret = PTR_ERR(info->spare);
+                        info->spare = NULL;
+                } else {
+                        info->spare_cpu = iter->cpu_file;
+                }
         }
         if (!info->spare)
-                return -ENOMEM;
+                return ret;
 
         /* Do we have previous read data to read? */
         if (info->read < PAGE_SIZE)
@@ -6790,8 +6795,9 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
                 ref->ref = 1;
                 ref->buffer = iter->trace_buffer->buffer;
                 ref->page = ring_buffer_alloc_read_page(ref->buffer, iter->cpu_file);
-                if (!ref->page) {
-                        ret = -ENOMEM;
+                if (IS_ERR(ref->page)) {
+                        ret = PTR_ERR(ref->page);
+                        ref->page = NULL;
                         kfree(ref);
                         break;
                 }
@@ -8293,6 +8299,7 @@ __init static int tracer_alloc_buffers(void)
         if (ret < 0)
                 goto out_free_cpumask;
         /* Used for event triggers */
+        ret = -ENOMEM;
         temp_buffer = ring_buffer_alloc(PAGE_SIZE, RB_FL_OVERWRITE);
         if (!temp_buffer)
                 goto out_rm_hp_state;
@@ -8407,4 +8414,4 @@ __init static int clear_boot_tracer(void)
 }
 
 fs_initcall(tracer_init_tracefs);
-late_initcall(clear_boot_tracer);
+late_initcall_sync(clear_boot_tracer);