Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

include/linux/netdevice.h
net/core/dev.c
  6510ea973d8d ("net: Use this_cpu_inc() to increment net->core_stats")
  794c24e9921f ("net-core: rx_otherhost_dropped to core_stats")
https://lore.kernel.org/all/20220428111903.5f4304e0@canb.auug.org.au/

drivers/net/wan/cosa.c
  d48fea8401cf ("net: cosa: fix error check return value of register_chrdev()")
  89fbca3307d4 ("net: wan: remove support for COSA and SRP synchronous serial boards")
https://lore.kernel.org/all/20220428112130.1f689e5e@canb.auug.org.au/

Signed-off-by: Jakub Kicinski <kuba@kernel.org>

6 files changed, 17 insertions, 14 deletions

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 23bb19716ad3..7858bafffa9d 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6247,7 +6247,7 @@ static int perf_mmap(struct file *file, struct vm_area_struct *vma)
 again:
 	mutex_lock(&event->mmap_mutex);
 	if (event->rb) {
-		if (event->rb->nr_pages != nr_pages) {
+		if (data_page_nr(event->rb) != nr_pages) {
 			ret = -EINVAL;
 			goto unlock;
 		}
diff --git a/kernel/events/internal.h b/kernel/events/internal.h
index 082832738c8f..5150d5f84c03 100644
--- a/kernel/events/internal.h
+++ b/kernel/events/internal.h
@@ -116,6 +116,11 @@ static inline int page_order(struct perf_buffer *rb)
 }
 #endif
 
+static inline int data_page_nr(struct perf_buffer *rb)
+{
+	return rb->nr_pages << page_order(rb);
+}
+
 static inline unsigned long perf_data_size(struct perf_buffer *rb)
 {
 	return rb->nr_pages << (PAGE_SHIFT + page_order(rb));
diff --git a/kernel/events/ring_buffer.c b/kernel/events/ring_buffer.c
index 52868716ec35..fb35b926024c 100644
--- a/kernel/events/ring_buffer.c
+++ b/kernel/events/ring_buffer.c
@@ -859,11 +859,6 @@ void rb_free(struct perf_buffer *rb)
 }
 
 #else
-static int data_page_nr(struct perf_buffer *rb)
-{
-	return rb->nr_pages << page_order(rb);
-}
-
 static struct page *
 __perf_mmap_to_page(struct perf_buffer *rb, unsigned long pgoff)
 {
diff --git a/kernel/kcov.c b/kernel/kcov.c
index 475524bd900a..b3732b210593 100644
--- a/kernel/kcov.c
+++ b/kernel/kcov.c
@@ -475,8 +475,11 @@ static int kcov_mmap(struct file *filep, struct vm_area_struct *vma)
 	vma->vm_flags |= VM_DONTEXPAND;
 	for (off = 0; off < size; off += PAGE_SIZE) {
 		page = vmalloc_to_page(kcov->area + off);
-		if (vm_insert_page(vma, vma->vm_start + off, page))
-			WARN_ONCE(1, "vm_insert_page() failed");
+		res = vm_insert_page(vma, vma->vm_start + off, page);
+		if (res) {
+			pr_warn_once("kcov: vm_insert_page() failed\n");
+			return res;
+		}
 	}
 	return 0;
 exit:
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index dbe57df2e199..dd58c0be9ce2 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -2126,7 +2126,7 @@ static void kretprobe_rethook_handler(struct rethook_node *rh, void *data,
 	struct kprobe_ctlblk *kcb;
 
 	/* The data must NOT be null. This means rethook data structure is broken. */
-	if (WARN_ON_ONCE(!data))
+	if (WARN_ON_ONCE(!data) || !rp->handler)
 		return;
 
 	__this_cpu_write(current_kprobe, &rp->kp);
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index d4bd299d67ab..a68482d66535 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3829,11 +3829,11 @@ static void attach_entity_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *s
 
 	se->avg.runnable_sum = se->avg.runnable_avg * divider;
 
-	se->avg.load_sum = divider;
-	if (se_weight(se)) {
-		se->avg.load_sum =
-			div_u64(se->avg.load_avg * se->avg.load_sum, se_weight(se));
-	}
+	se->avg.load_sum = se->avg.load_avg * divider;
+	if (se_weight(se) < se->avg.load_sum)
+		se->avg.load_sum = div_u64(se->avg.load_sum, se_weight(se));
+	else
+		se->avg.load_sum = 1;
 
 	enqueue_load_avg(cfs_rq, se);
 	cfs_rq->avg.util_avg += se->avg.util_avg;