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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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6
include/linux/ima.h
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@@ -19,6 +19,7 @@ extern int ima_file_check(struct file *file, int mask, int opened);
extern void ima_file_free(struct file *file);
extern int ima_file_mmap(struct file *file, unsigned long prot);
extern int ima_module_check(struct file *file);
extern int ima_read_file(struct file *file, enum kernel_read_file_id id);
extern int ima_post_read_file(struct file *file, void *buf, loff_t size,
enum kernel_read_file_id id);
@@ -48,6 +49,11 @@ static inline int ima_module_check(struct file *file)
return 0;
}
static inline int ima_read_file(struct file *file, enum kernel_read_file_id id)
{
return 0;
}
static inline int ima_post_read_file(struct file *file, void *buf, loff_t size,
enum kernel_read_file_id id)
{