diff options
| -rw-r--r-- | mm/shmem.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index de981370fbc5..47d536e59fc0 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -3401,7 +3401,13 @@ int shmem_zero_setup(struct vm_area_struct *vma) struct file *file; loff_t size = vma->vm_end - vma->vm_start; - file = shmem_file_setup("dev/zero", size, vma->vm_flags); + /* + * Cloning a new file under mmap_sem leads to a lock ordering conflict + * between XFS directory reading and selinux: since this file is only + * accessible to the user through its mapping, use S_PRIVATE flag to + * bypass file security, in the same way as shmem_kernel_file_setup(). + */ + file = __shmem_file_setup("dev/zero", size, vma->vm_flags, S_PRIVATE); if (IS_ERR(file)) return PTR_ERR(file); |