apparmor: do not expose kernel stack

Do not copy uninitalized fields th.td_hilen, th.td_data.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: John Johansen <john.johansen@canonical.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/security/apparmor/match.c b/security/apparmor/match.c
index 32b72eb3d988..3f900fcca8fb 100644
--- a/security/apparmor/match.c
+++ b/security/apparmor/match.c
@@ -63,7 +63,9 @@ static struct table_header *unpack_table(char *blob, size_t bsize)
 
         table = kvzalloc(tsize);
         if (table) {
-                *table = th;
+                table->td_id = th.td_id;
+                table->td_flags = th.td_flags;
+                table->td_lolen = th.td_lolen;
                 if (th.td_flags == YYTD_DATA8)
                         UNPACK_ARRAY(table->td_data, blob, th.td_lolen,
                                      u8, byte_to_byte);