take rlimit check to callers of expand_files()

... except for one in android, where the check is different
and already done in caller.  No need to recalculate rlimit
many times in alloc_fd() either.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/fcntl.c b/fs/fcntl.c
index 887b5ba..08e6af5 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -64,6 +64,9 @@ SYSCALL_DEFINE3(dup3, unsigned int, oldfd, unsigned int, newfd, int, flags)
 	if (unlikely(oldfd == newfd))
 		return -EINVAL;
 
+	if (newfd >= rlimit(RLIMIT_NOFILE))
+		return -EMFILE;
+
 	spin_lock(&files->file_lock);
 	err = expand_files(files, newfd);
 	file = fcheck(oldfd);