diff options
| author | Kees Cook <keescook@chromium.org> | 2020-10-02 10:38:23 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-05 13:37:03 +0200 |
| commit | 2039bda1fa8dad3f4275b29eeaffef545bcbc85d (patch) | |
| tree | 68a81272505370153df7eca21780bf3f91f0f2eb /include/linux/ima.h | |
| parent | 38f901735a9e2b3d182fc04a1dfcdb0d3325ea5d (diff) | |
LSM: Add "contents" flag to kernel_read_file hook
As with the kernel_load_data LSM hook, add a "contents" flag to the
kernel_read_file LSM hook that indicates whether the LSM can expect
a matching call to the kernel_post_read_file LSM hook with the full
contents of the file. With the coming addition of partial file read
support for kernel_read_file*() API, the LSM will no longer be able
to always see the entire contents of a file during the read calls.
For cases where the LSM must read examine the complete file contents,
it will need to do so on its own every time the kernel_read_file
hook is called with contents=false (or reject such cases). Adjust all
existing LSMs to retain existing behavior.
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Link: https://lore.kernel.org/r/20201002173828.2099543-12-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/ima.h')
| -rw-r--r-- | include/linux/ima.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/ima.h b/include/linux/ima.h index af9fb8c5f16a..8fa7bcfb2da2 100644 --- a/include/linux/ima.h +++ b/include/linux/ima.h @@ -23,7 +23,8 @@ extern int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot); extern int ima_load_data(enum kernel_load_data_id id, bool contents); extern int ima_post_load_data(char *buf, loff_t size, enum kernel_load_data_id id, char *description); -extern int ima_read_file(struct file *file, enum kernel_read_file_id id); +extern int ima_read_file(struct file *file, enum kernel_read_file_id id, + bool contents); extern int ima_post_read_file(struct file *file, void *buf, loff_t size, enum kernel_read_file_id id); extern void ima_post_path_mknod(struct dentry *dentry); @@ -92,7 +93,8 @@ static inline int ima_post_load_data(char *buf, loff_t size, return 0; } -static inline int ima_read_file(struct file *file, enum kernel_read_file_id id) +static inline int ima_read_file(struct file *file, enum kernel_read_file_id id, + bool contents) { return 0; } |