From 3350607dc5637be2563f484dcfe2fed456f3d4ff Mon Sep 17 00:00:00 2001 From: Günther Noack Date: Tue, 18 Oct 2022 20:22:06 +0200 Subject: security: Create file_truncate hook from path_truncate hook MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Like path_truncate, the file_truncate hook also restricts file truncation, but is called in the cases where truncation is attempted on an already-opened file. This is required in a subsequent commit to handle ftruncate() operations differently to truncate() operations. Acked-by: Tetsuo Handa Acked-by: John Johansen Acked-by: Paul Moore Signed-off-by: Günther Noack Link: https://lore.kernel.org/r/20221018182216.301684-2-gnoack3000@gmail.com Signed-off-by: Mickaël Salaün --- include/linux/security.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux/security.h') diff --git a/include/linux/security.h b/include/linux/security.h index ca1b7109c0db..1b5de26bdb12 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -396,6 +396,7 @@ int security_file_send_sigiotask(struct task_struct *tsk, struct fown_struct *fown, int sig); int security_file_receive(struct file *file); int security_file_open(struct file *file); +int security_file_truncate(struct file *file); int security_task_alloc(struct task_struct *task, unsigned long clone_flags); void security_task_free(struct task_struct *task); int security_cred_alloc_blank(struct cred *cred, gfp_t gfp); @@ -1014,6 +1015,11 @@ static inline int security_file_open(struct file *file) return 0; } +static inline int security_file_truncate(struct file *file) +{ + return 0; +} + static inline int security_task_alloc(struct task_struct *task, unsigned long clone_flags) { -- cgit