security: report the module name to security_module_request

For SELinux to do better filtering in userspace we send the name of the
module along with the AVC denial when a program is denied module_request.

Example output:

type=SYSCALL msg=audit(11/03/2009 10:59:43.510:9) : arch=x86_64 syscall=write success=yes exit=2 a0=3 a1=7fc28c0d56c0 a2=2 a3=7fffca0d7440 items=0 ppid=1727 pid=1729 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=rpc.nfsd exe=/usr/sbin/rpc.nfsd subj=system_u:system_r:nfsd_t:s0 key=(null)
type=AVC msg=audit(11/03/2009 10:59:43.510:9) : avc:  denied  { module_request } for  pid=1729 comm=rpc.nfsd kmod="net-pf-10" scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=system

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/security/lsm_audit.c b/security/lsm_audit.c
index 3bb90b6f1dd3..51bd0fd9c9f0 100644
--- a/security/lsm_audit.c
+++ b/security/lsm_audit.c
@@ -354,6 +354,10 @@ static void dump_common_audit_data(struct audit_buffer *ab,
                 }
                 break;
 #endif
+        case LSM_AUDIT_DATA_KMOD:
+                audit_log_format(ab, " kmod=");
+                audit_log_untrustedstring(ab, a->u.kmod_name);
+                break;
         } /* switch (a->type) */
 }