diff options
| author | Christian Brauner <brauner@kernel.org> | 2025-04-15 10:27:50 +0200 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-04-21 10:27:59 +0200 |
| commit | 79beea2db0431536d79fc5d321225fb42f955466 (patch) | |
| tree | 980efada036fa2da8f5180397ba57f915ab71b9f /fs/exec.c | |
| parent | d1f482108a2cff2b9c6ebebc40b157aaeb8213b3 (diff) | |
| download | linux-79beea2db0431536d79fc5d321225fb42f955466.tar.gz | |
fs: remove uselib() system call
This system call has been deprecated for quite a while now.
Let's try and remove it from the kernel completely.
Link: https://lore.kernel.org/20250415-kanufahren-besten-02ac00e6becd@brauner
Acked-by: Kees Cook <kees@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/exec.c')
| -rw-r--r-- | fs/exec.c | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/fs/exec.c b/fs/exec.c index 8e4ea5f1e64c69..cfbb2b9ee3c9b5 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -115,66 +115,6 @@ bool path_noexec(const struct path *path) (path->mnt->mnt_sb->s_iflags & SB_I_NOEXEC); } -#ifdef CONFIG_USELIB -/* - * Note that a shared library must be both readable and executable due to - * security reasons. - * - * Also note that we take the address to load from the file itself. - */ -SYSCALL_DEFINE1(uselib, const char __user *, library) -{ - struct linux_binfmt *fmt; - struct file *file; - struct filename *tmp = getname(library); - int error = PTR_ERR(tmp); - static const struct open_flags uselib_flags = { - .open_flag = O_LARGEFILE | O_RDONLY, - .acc_mode = MAY_READ | MAY_EXEC, - .intent = LOOKUP_OPEN, - .lookup_flags = LOOKUP_FOLLOW, - }; - - if (IS_ERR(tmp)) - goto out; - - file = do_filp_open(AT_FDCWD, tmp, &uselib_flags); - putname(tmp); - error = PTR_ERR(file); - if (IS_ERR(file)) - goto out; - - /* - * Check do_open_execat() for an explanation. - */ - error = -EACCES; - if (WARN_ON_ONCE(!S_ISREG(file_inode(file)->i_mode)) || - path_noexec(&file->f_path)) - goto exit; - - error = -ENOEXEC; - - read_lock(&binfmt_lock); - list_for_each_entry(fmt, &formats, lh) { - if (!fmt->load_shlib) - continue; - if (!try_module_get(fmt->module)) - continue; - read_unlock(&binfmt_lock); - error = fmt->load_shlib(file); - read_lock(&binfmt_lock); - put_binfmt(fmt); - if (error != -ENOEXEC) - break; - } - read_unlock(&binfmt_lock); -exit: - fput(file); -out: - return error; -} -#endif /* #ifdef CONFIG_USELIB */ - #ifdef CONFIG_MMU /* * The nascent bprm->mm is not visible until exec_mmap() but it can |