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Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

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Pull security layer updates from James Morris:
 "In terms of changes, there's general maintenance to the Smack,
  SELinux, and integrity code.

  The IMA code adds a new kconfig option, IMA_APPRAISE_SIGNED_INIT,
  which allows IMA appraisal to require signatures.  Support for reading
  keys from rootfs before init is call is also added"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (23 commits)
  selinux: Remove security_ops extern
  security: smack: fix out-of-bounds access in smk_parse_smack()
  VFS: refactor vfs_read()
  ima: require signature based appraisal
  integrity: provide a hook to load keys when rootfs is ready
  ima: load x509 certificate from the kernel
  integrity: provide a function to load x509 certificate from the kernel
  integrity: define a new function integrity_read_file()
  Security: smack: replace kzalloc with kmem_cache for inode_smack
  Smack: Lock mode for the floor and hat labels
  ima: added support for new kernel cmdline parameter ima_template_fmt
  ima: allocate field pointers array on demand in template_desc_init_fields()
  ima: don't allocate a copy of template_fmt in template_desc_init_fields()
  ima: display template format in meas. list if template name length is zero
  ima: added error messages to template-related functions
  ima: use atomic bit operations to protect policy update interface
  ima: ignore empty and with whitespaces policy lines
  ima: no need to allocate entry for comment
  ima: report policy load status
  ima: use path names cache
  ...
This commit is contained in:
Linus Torvalds
2014-12-14 20:36:37 -08:00
parent 6ae840e7cc b2d1965dce
commit 67e2c38838
21 changed files with 374 additions and 155 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
security/integrity/ima/ima_crypto.c
View File

@@ -67,36 +67,6 @@ MODULE_PARM_DESC(ahash_bufsize, "Maximum ahash buffer size");
static struct crypto_shash *ima_shash_tfm;
static struct crypto_ahash *ima_ahash_tfm;
/**
* ima_kernel_read - read file content
*
* This is a function for reading file content instead of kernel_read().
* It does not perform locking checks to ensure it cannot be blocked.
* It does not perform security checks because it is irrelevant for IMA.
*
*/
static int ima_kernel_read(struct file *file, loff_t offset,
char *addr, unsigned long count)
{
mm_segment_t old_fs;
char __user *buf = addr;
ssize_t ret = -EINVAL;
if (!(file->f_mode & FMODE_READ))
return -EBADF;
old_fs = get_fs();
set_fs(get_ds());
if (file->f_op->read)
ret = file->f_op->read(file, buf, count, &offset);
else if (file->f_op->aio_read)
ret = do_sync_read(file, buf, count, &offset);
else if (file->f_op->read_iter)
ret = new_sync_read(file, buf, count, &offset);
set_fs(old_fs);
return ret;
}
int __init ima_init_crypto(void)
{
long rc;
@@ -324,7 +294,8 @@ static int ima_calc_file_hash_atfm(struct file *file,
}
/* read buffer */
rbuf_len = min_t(loff_t, i_size - offset, rbuf_size[active]);
rc = ima_kernel_read(file, offset, rbuf[active], rbuf_len);
rc = integrity_kernel_read(file, offset, rbuf[active],
rbuf_len);
if (rc != rbuf_len)
goto out3;
@@ -414,7 +385,7 @@ static int ima_calc_file_hash_tfm(struct file *file,
while (offset < i_size) {
int rbuf_len;
rbuf_len = ima_kernel_read(file, offset, rbuf, PAGE_SIZE);
rbuf_len = integrity_kernel_read(file, offset, rbuf, PAGE_SIZE);
if (rbuf_len < 0) {
rc = rbuf_len;
break;