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authorKees Cook <keescook@chromium.org>2020-10-02 20:38:23 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-10-05 14:37:03 +0300
commit2039bda1fa8dad3f4275b29eeaffef545bcbc85d (patch)
tree68a81272505370153df7eca21780bf3f91f0f2eb /include/linux/lsm_hook_defs.h
parent38f901735a9e2b3d182fc04a1dfcdb0d3325ea5d (diff)
downloadlinux-2039bda1fa8dad3f4275b29eeaffef545bcbc85d.tar.xz
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/lsm_hook_defs.h')
-rw-r--r--include/linux/lsm_hook_defs.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
index 83c6f1f5cc1e..d67cb3502310 100644
--- a/include/linux/lsm_hook_defs.h
+++ b/include/linux/lsm_hook_defs.h
@@ -188,7 +188,7 @@ LSM_HOOK(int, 0, kernel_load_data, enum kernel_load_data_id id, bool contents)
LSM_HOOK(int, 0, kernel_post_load_data, char *buf, loff_t size,
enum kernel_read_file_id id, char *description)
LSM_HOOK(int, 0, kernel_read_file, struct file *file,
- enum kernel_read_file_id id)
+ enum kernel_read_file_id id, bool contents)
LSM_HOOK(int, 0, kernel_post_read_file, struct file *file, char *buf,
loff_t size, enum kernel_read_file_id id)
LSM_HOOK(int, 0, task_fix_setuid, struct cred *new, const struct cred *old,