Linux-libre 4.7.6-gnupck-4.7.6-gnu

5 files changed, 33 insertions, 20 deletions

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index e0be49fc3..129a7ca5f 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -6240,6 +6240,12 @@ void cgroup_sk_alloc(struct sock_cgroup_data *skcd)
 	if (cgroup_sk_alloc_disabled)
 		return;
 
+	/* Socket clone path */
+	if (skcd->val) {
+		cgroup_get(sock_cgroup_ptr(skcd));
+		return;
+	}
+
 	rcu_read_lock();
 
 	while (true) {
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 31b665ba1..2444206e9 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -299,12 +299,12 @@ static int create_image(int platform_mode)
 	save_processor_state();
 	trace_suspend_resume(TPS("machine_suspend"), PM_EVENT_HIBERNATE, true);
 	error = swsusp_arch_suspend();
+	/* Restore control flow magically appears here */
+	restore_processor_state();
 	trace_suspend_resume(TPS("machine_suspend"), PM_EVENT_HIBERNATE, false);
 	if (error)
 		printk(KERN_ERR "PM: Error %d creating hibernation image\n",
 			error);
-	/* Restore control flow magically appears here */
-	restore_processor_state();
 	if (!in_suspend)
 		events_check_enabled = false;
 
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index 542163a01..dc3bab15e 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -812,9 +812,9 @@ static bool memory_bm_pfn_present(struct memory_bitmap *bm, int index, unsigned
  */
 static bool rtree_next_node(struct memory_bitmap *bm, int index)
 {
-	bm->cur[index].node = list_entry(bm->cur[index].node->list.next,
-				  struct rtree_node, list);
-	if (&bm->cur[index].node->list != &bm->cur[index].zone->leaves) {
+	if (!list_is_last(&bm->cur[index].node->list, &bm->cur[index].zone->leaves)) {
+		bm->cur[index].node = list_entry(bm->cur[index].node->list.next,
+					  struct rtree_node, list);
 		bm->cur[index].node_pfn += BM_BITS_PER_BLOCK;
 		bm->cur[index].node_bit  = 0;
 		touch_softlockup_watchdog();
@@ -822,9 +822,9 @@ static bool rtree_next_node(struct memory_bitmap *bm, int index)
 	}
 
 	/* No more nodes, goto next zone */
-	bm->cur[index].zone = list_entry(bm->cur[index].zone->list.next,
+	if (!list_is_last(&bm->cur[index].zone->list, &bm->zones)) {
+		bm->cur[index].zone = list_entry(bm->cur[index].zone->list.next,
 				  struct mem_zone_bm_rtree, list);
-	if (&bm->cur[index].zone->list != &bm->zones) {
 		bm->cur[index].node = list_entry(bm->cur[index].zone->leaves.next,
 					  struct rtree_node, list);
 		bm->cur[index].node_pfn = 0;
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
index 979e7bfbd..d0a1617b5 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -1,4 +1,8 @@
 
+# We are fully aware of the dangers of __builtin_return_address()
+FRAME_CFLAGS := $(call cc-disable-warning,frame-address)
+KBUILD_CFLAGS += $(FRAME_CFLAGS)
+
 # Do not instrument the tracer itself:
 
 ifdef CONFIG_FUNCTION_TRACER
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 8a4bd6b68..77eeab277 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -4890,19 +4890,20 @@ tracing_read_pipe(struct file *filp, char __user *ubuf,
 	struct trace_iterator *iter = filp->private_data;
 	ssize_t sret;
 
-	/* return any leftover data */
-	sret = trace_seq_to_user(&iter->seq, ubuf, cnt);
-	if (sret != -EBUSY)
-		return sret;
-
-	trace_seq_init(&iter->seq);
-
 	/*
 	 * Avoid more than one consumer on a single file descriptor
 	 * This is just a matter of traces coherency, the ring buffer itself
 	 * is protected.
 	 */
 	mutex_lock(&iter->mutex);
+
+	/* return any leftover data */
+	sret = trace_seq_to_user(&iter->seq, ubuf, cnt);
+	if (sret != -EBUSY)
+		goto out;
+
+	trace_seq_init(&iter->seq);
+
 	if (iter->trace->read) {
 		sret = iter->trace->read(iter, filp, ubuf, cnt, ppos);
 		if (sret)
@@ -5929,9 +5930,6 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
 		return -EBUSY;
 #endif
 
-	if (splice_grow_spd(pipe, &spd))
-		return -ENOMEM;
-
 	if (*ppos & (PAGE_SIZE - 1))
 		return -EINVAL;
 
@@ -5941,6 +5939,9 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
 		len &= PAGE_MASK;
 	}
 
+	if (splice_grow_spd(pipe, &spd))
+		return -ENOMEM;
+
  again:
 	trace_access_lock(iter->cpu_file);
 	entries = ring_buffer_entries_cpu(iter->trace_buffer->buffer, iter->cpu_file);
@@ -5998,19 +5999,21 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
 	/* did we read anything? */
 	if (!spd.nr_pages) {
 		if (ret)
-			return ret;
+			goto out;
 
+		ret = -EAGAIN;
 		if ((file->f_flags & O_NONBLOCK) || (flags & SPLICE_F_NONBLOCK))
-			return -EAGAIN;
+			goto out;
 
 		ret = wait_on_pipe(iter, true);
 		if (ret)
-			return ret;
+			goto out;
 
 		goto again;
 	}
 
 	ret = splice_to_pipe(pipe, &spd);
+out:
 	splice_shrink_spd(&spd);
 
 	return ret;