VisionFive2 Linux kernel

author: Mike Rapoport <rppt@linux.vnet.ibm.com> 2017-02-24 14:58:31 -0800 committer: Linus Torvalds <torvalds@linux-foundation.org> 2017-02-24 17:46:55 -0800 commit: 96333187ab16215888f2bce01985ca5a823da8ba parent: 27d02568f529e908399514dfbee8ee43bdfd5299

Commit Summary:

userfaultfd_copy: return -ENOSPC in case mm has gone

Diffstat:

1 file changed, 2 insertions, 0 deletions

diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index b676575f2268..625b7285a37b 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -1607,6 +1607,8 @@ static int userfaultfd_copy(struct userfaultfd_ctx *ctx,
 		ret = mcopy_atomic(ctx->mm, uffdio_copy.dst, uffdio_copy.src,
 				   uffdio_copy.len);
 		mmput(ctx->mm);
+	} else {
+		return -ENOSPC;
 	}
 	if (unlikely(put_user(ret, &user_uffdio_copy->copy)))
 		return -EFAULT;