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-rw-r--r--security/commoncap.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/security/commoncap.c b/security/commoncap.c
index 71a166a05975..f80d11609391 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -512,14 +512,17 @@ skip:
/* Don't let someone trace a set[ug]id/setpcap binary with the revised
- * credentials unless they have the appropriate permit
+ * credentials unless they have the appropriate permit.
+ *
+ * In addition, if NO_NEW_PRIVS, then ensure we get no new privs.
*/
if ((new->euid != old->uid ||
new->egid != old->gid ||
!cap_issubset(new->cap_permitted, old->cap_permitted)) &&
bprm->unsafe & ~LSM_UNSAFE_PTRACE_CAP) {
/* downgrade; they get no more than they had, and maybe less */
- if (!capable(CAP_SETUID)) {
+ if (!capable(CAP_SETUID) ||
+ (bprm->unsafe & LSM_UNSAFE_NO_NEW_PRIVS)) {
new->euid = new->uid;
new->egid = new->gid;
}

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