Commit 25354c4f authored by Eric Paris's avatar Eric Paris Committed by James Morris
Browse files

SELinux: add selinux_kernel_module_request



This patch adds a new selinux hook so SELinux can arbitrate if a given
process should be allowed to trigger a request for the kernel to try to
load a module.  This is a different operation than a process trying to load
a module itself, which is already protected by CAP_SYS_MODULE.
Signed-off-by: default avatarEric Paris <eparis@redhat.com>
Acked-by: default avatarSerge Hallyn <serue@us.ibm.com>
Signed-off-by: default avatarJames Morris <jmorris@namei.org>
parent 9188499c
......@@ -3296,6 +3296,11 @@ static int selinux_kernel_create_files_as(struct cred *new, struct inode *inode)
return 0;
}
static int selinux_kernel_module_request(void)
{
return task_has_system(current, SYSTEM__MODULE_REQUEST);
}
static int selinux_task_setpgid(struct task_struct *p, pid_t pgid)
{
return current_has_perm(p, PROCESS__SETPGID);
......@@ -5404,6 +5409,7 @@ static struct security_operations selinux_ops = {
.cred_prepare = selinux_cred_prepare,
.kernel_act_as = selinux_kernel_act_as,
.kernel_create_files_as = selinux_kernel_create_files_as,
.kernel_module_request = selinux_kernel_module_request,
.task_setpgid = selinux_task_setpgid,
.task_getpgid = selinux_task_getpgid,
.task_getsid = selinux_task_getsid,
......
......@@ -107,6 +107,7 @@
S_(SECCLASS_SYSTEM, SYSTEM__SYSLOG_READ, "syslog_read")
S_(SECCLASS_SYSTEM, SYSTEM__SYSLOG_MOD, "syslog_mod")
S_(SECCLASS_SYSTEM, SYSTEM__SYSLOG_CONSOLE, "syslog_console")
S_(SECCLASS_SYSTEM, SYSTEM__MODULE_REQUEST, "module_request")
S_(SECCLASS_CAPABILITY, CAPABILITY__CHOWN, "chown")
S_(SECCLASS_CAPABILITY, CAPABILITY__DAC_OVERRIDE, "dac_override")
S_(SECCLASS_CAPABILITY, CAPABILITY__DAC_READ_SEARCH, "dac_read_search")
......
......@@ -508,6 +508,7 @@
#define SYSTEM__SYSLOG_READ 0x00000002UL
#define SYSTEM__SYSLOG_MOD 0x00000004UL
#define SYSTEM__SYSLOG_CONSOLE 0x00000008UL
#define SYSTEM__MODULE_REQUEST 0x00000010UL
#define CAPABILITY__CHOWN 0x00000001UL
#define CAPABILITY__DAC_OVERRIDE 0x00000002UL
#define CAPABILITY__DAC_READ_SEARCH 0x00000004UL
......
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