diff options
| -rw-r--r-- | fs/fcntl.c | 3 | ||||
| -rw-r--r-- | fs/file.c | 16 |
2 files changed, 12 insertions, 7 deletions
diff --git a/fs/fcntl.c b/fs/fcntl.c index 887b5ba8c9b5..08e6af5c1b1f 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); diff --git a/fs/file.c b/fs/file.c index 5b46e9970a7a..08922af4a62c 100644 --- a/fs/file.c +++ b/fs/file.c @@ -251,13 +251,6 @@ int expand_files(struct files_struct *files, int nr) fdt = files_fdtable(files); - /* - * N.B. For clone tasks sharing a files structure, this test - * will limit the total number of files that can be opened. - */ - if (nr >= rlimit(RLIMIT_NOFILE)) - return -EMFILE; - /* Do we need to expand? */ if (nr < fdt->max_fds) return 0; @@ -431,6 +424,7 @@ int alloc_fd(unsigned start, unsigned flags) { struct files_struct *files = current->files; unsigned int fd; + unsigned end = rlimit(RLIMIT_NOFILE); int error; struct fdtable *fdt; @@ -444,6 +438,14 @@ repeat: if (fd < fdt->max_fds) fd = find_next_zero_bit(fdt->open_fds, fdt->max_fds, fd); + /* + * N.B. For clone tasks sharing a files structure, this test + * will limit the total number of files that can be opened. + */ + error = -EMFILE; + if (fd >= end) + goto out; + error = expand_files(files, fd); if (error < 0) goto out; |