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vfs: define kernel_read_file_id enumeration

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To differentiate between the kernel_read_file() callers, this patch
defines a new enumeration named kernel_read_file_id and includes the
caller identifier as an argument.

Subsequent patches define READING_KEXEC_IMAGE, READING_KEXEC_INITRAMFS,
READING_FIRMWARE, READING_MODULE, and READING_POLICY.

Changelog v3:
- Replace the IMA specific enumeration with a generic one.

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>
Cc: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Mimi Zohar 2016-01-24 10:07:32 -05:00
parent b44a7dfc6f
commit bc8ca5b92d
5 changed files with 19 additions and 8 deletions
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4
fs/exec.c
View file

@ -833,7 +833,7 @@ int kernel_read(struct file *file, loff_t offset,
EXPORT_SYMBOL(kernel_read);
int kernel_read_file(struct file *file, void **buf, loff_t *size,
loff_t max_size)
loff_t max_size, enum kernel_read_file_id id)
{
loff_t i_size, pos;
ssize_t bytes = 0;
@ -871,7 +871,7 @@ int kernel_read_file(struct file *file, void **buf, loff_t *size,
goto out;
}
ret = security_kernel_post_read_file(file, *buf, i_size);
ret = security_kernel_post_read_file(file, *buf, i_size, id);
if (!ret)
*size = pos;