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security: define kernel_read_file hook

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The kernel_read_file security hook is called prior to reading the file
into memory.

Changelog v4+:
- export security_kernel_read_file()

Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Luis R. Rodriguez <mcgrof@kernel.org>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
This commit is contained in:
Mimi Zohar
2016-01-30 22:23:26 -05:00
parent e40ba6d56b
commit 39eeb4fb97
6 changed files with 54 additions and 0 deletions
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7
include/linux/security.h
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@@ -302,6 +302,7 @@ int security_kernel_act_as(struct cred *new, u32 secid);
int security_kernel_create_files_as(struct cred *new, struct inode *inode);
int security_kernel_module_request(char *kmod_name);
int security_kernel_module_from_file(struct file *file);
int security_kernel_read_file(struct file *file, enum kernel_read_file_id id);
int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
enum kernel_read_file_id id);
int security_task_fix_setuid(struct cred *new, const struct cred *old,
@@ -863,6 +864,12 @@ static inline int security_kernel_module_from_file(struct file *file)
return 0;
}
static inline int security_kernel_read_file(struct file *file,
enum kernel_read_file_id id)
{
return 0;
}
static inline int security_kernel_post_read_file(struct file *file,
char *buf, loff_t size,
enum kernel_read_file_id id)