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-rw-r--r--security/commoncap.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/security/commoncap.c b/security/commoncap.c
index edd3918fac02..f80d11609391 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -29,6 +29,7 @@
#include <linux/securebits.h>
#include <linux/user_namespace.h>
#include <linux/binfmts.h>
+#include <linux/personality.h>
/*
* If a non-root user executes a setuid-root binary in
@@ -505,6 +506,11 @@ int cap_bprm_set_creds(struct linux_binprm *bprm)
}
skip:
+ /* if we have fs caps, clear dangerous personality flags */
+ if (!cap_issubset(new->cap_permitted, old->cap_permitted))
+ bprm->per_clear |= PER_CLEAR_ON_SETID;
+
+
/* Don't let someone trace a set[ug]id/setpcap binary with the revised
* credentials unless they have the appropriate permit.
*

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