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authorMimi Zohar <zohar@linux.vnet.ibm.com>2015-12-30 07:35:30 -0500
committerMimi Zohar <zohar@linux.vnet.ibm.com>2016-02-21 09:06:12 -0500
commita1db74209483a24c861c848b4bb79a4d945ef6fa (patch)
tree4edf4c1a22e4a8446166366e5cee358c99e8fda0 /include/linux/ima.h
parentb844f0ecbc5626ec26cfc70cb144a4c9b85dc3f2 (diff)
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module: replace copy_module_from_fd with kernel version
Replace copy_module_from_fd() with kernel_read_file_from_fd(). Although none of the upstreamed LSMs define a kernel_module_from_file hook, IMA is called, based on policy, to prevent unsigned kernel modules from being loaded by the original kernel module syscall and to measure/appraise signed kernel modules. The security function security_kernel_module_from_file() was called prior to reading a kernel module. Preventing unsigned kernel modules from being loaded by the original kernel module syscall remains on the pre-read kernel_read_file() security hook. Instead of reading the kernel module twice, once for measuring/appraising and again for loading the kernel module, the signature validation is moved to the kernel_post_read_file() security hook. This patch removes the security_kernel_module_from_file() hook and security call. 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: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/ima.h')
-rw-r--r--include/linux/ima.h6
1 files changed, 0 insertions, 6 deletions
diff --git a/include/linux/ima.h b/include/linux/ima.h
index 6adcaea8101c..e6516cbbe9bf 100644
--- a/include/linux/ima.h
+++ b/include/linux/ima.h
@@ -18,7 +18,6 @@ extern int ima_bprm_check(struct linux_binprm *bprm);
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);
@@ -44,11 +43,6 @@ static inline int ima_file_mmap(struct file *file, unsigned long prot)
return 0;
}
-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;