diff options
| -rw-r--r-- | fs/file.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/file.c b/fs/file.c index 0f1bda4bebfa..d3b5fa80b71b 100644 --- a/fs/file.c +++ b/fs/file.c @@ -922,6 +922,9 @@ SYSCALL_DEFINE3(dup3, unsigned int, oldfd, unsigned int, newfd, int, flags) if ((flags & ~O_CLOEXEC) != 0) return -EINVAL; + if (unlikely(oldfd == newfd)) + return -EINVAL; + if (newfd >= rlimit(RLIMIT_NOFILE)) return -EMFILE; |