fs/proc/base.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 72a1acd03675..1b646cb96509 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -835,6 +835,18 @@ static int mem_open(struct inode *inode, struct file *file)
 	return ret;
 }
 
+static bool proc_is_ptracing(struct file *file, struct mm_struct *mm)
+{
+	bool ptrace_active = false;
+	struct task_struct *task = get_proc_task(file_inode(file));
+
+	if (task) {
+		ptrace_active = task->ptrace && task->mm == mm && task->parent == current;
+		put_task_struct(task);
+	}
+	return ptrace_active;
+}
+
 static ssize_t mem_rw(struct file *file, char __user *buf,
 			size_t count, loff_t *ppos, int write)
 {
@@ -855,7 +867,9 @@ static ssize_t mem_rw(struct file *file, char __user *buf,
 	if (!mmget_not_zero(mm))
 		goto free;
 
-	flags = FOLL_FORCE | (write ? FOLL_WRITE : 0);
+	flags = write ? FOLL_WRITE : 0;
+	if (proc_is_ptracing(file, mm))
+		flags |= FOLL_FORCE;
 
 	while (count > 0) {
 		size_t this_len = min_t(size_t, count, PAGE_SIZE);