Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus

[mirror_ubuntu-bionic-kernel.git] / fs / proc / task_nommu.c

diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 64a72e2e76509545bf6c0d4d4e0788779baaab26..8f5c05d3dbd3e2aaa4abcd3fcc92af79e324daca 100644 (file)
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -189,6 +189,7 @@ static void *m_start(struct seq_file *m, loff_t *pos)
                priv->task = NULL;
                return NULL;
        }
+       down_read(&mm->mmap_sem);
 
        /* start from the Nth VMA */
        for (p = rb_first(&mm->mm_rb); p; p = rb_next(p))