A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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module: replace the existing LSM hook in init_module

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Both the init_module and finit_module syscalls call either directly
or indirectly the security_kernel_read_file LSM hook.  This patch
replaces the direct call in init_module with a call to the new
security_kernel_load_data hook and makes the corresponding changes
in SELinux, LoadPin, and IMA.

Signed-off-by: Mimi Zohar <[email protected]>
Cc: Jeff Vander Stoep <[email protected]>
Cc: Casey Schaufler <[email protected]>
Cc: Kees Cook <[email protected]>
Acked-by: Jessica Yu <[email protected]>
Acked-by: Paul Moore <[email protected]>
Acked-by: Kees Cook <[email protected]>
Signed-off-by: James Morris <[email protected]>
This commit is contained in:
Mimi Zohar 2018-07-13 14:06:02 -04:00 • committed by James Morris
commit c77b8cdf74
4 changed files with 32 additions and 14 deletions
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15
security/selinux/hooks.c
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@ -4073,6 +4073,20 @@ static int selinux_kernel_read_file(struct file *file,
return rc;
}
static int selinux_kernel_load_data(enum kernel_load_data_id id)
{
int rc = 0;
switch (id) {
case LOADING_MODULE:
rc = selinux_kernel_module_from_file(NULL);
default:
break;
}
return rc;
}
static int selinux_task_setpgid(struct task_struct *p, pid_t pgid)
{
return avc_has_perm(&selinux_state,
@ -6972,6 +6986,7 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(kernel_act_as, selinux_kernel_act_as),
LSM_HOOK_INIT(kernel_create_files_as, selinux_kernel_create_files_as),
LSM_HOOK_INIT(kernel_module_request, selinux_kernel_module_request),
LSM_HOOK_INIT(kernel_load_data, selinux_kernel_load_data),
LSM_HOOK_INIT(kernel_read_file, selinux_kernel_read_file),
LSM_HOOK_INIT(task_setpgid, selinux_task_setpgid),
LSM_HOOK_INIT(task_getpgid, selinux_task_getpgid),