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-rw-r--r--security/commoncap.c23
1 files changed, 22 insertions, 1 deletions
diff --git a/security/commoncap.c b/security/commoncap.c
index d7eff5797b9..d4539338099 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -8,6 +8,7 @@
*/
#include <linux/capability.h>
+#include <linux/audit.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
@@ -376,6 +377,9 @@ int cap_bprm_set_security (struct linux_binprm *bprm)
void cap_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
{
+ kernel_cap_t pP = current->cap_permitted;
+ kernel_cap_t pE = current->cap_effective;
+
if (bprm->e_uid != current->uid || bprm->e_gid != current->gid ||
!cap_issubset(bprm->cap_post_exec_permitted,
current->cap_permitted)) {
@@ -409,7 +413,24 @@ void cap_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
cap_clear(current->cap_effective);
}
- /* AUD: Audit candidate if current->cap_effective is set */
+ /*
+ * Audit candidate if current->cap_effective is set
+ *
+ * We do not bother to audit if 3 things are true:
+ * 1) cap_effective has all caps
+ * 2) we are root
+ * 3) root is supposed to have all caps (SECURE_NOROOT)
+ * Since this is just a normal root execing a process.
+ *
+ * Number 1 above might fail if you don't have a full bset, but I think
+ * that is interesting information to audit.
+ */
+ if (!cap_isclear(current->cap_effective)) {
+ if (!cap_issubset(CAP_FULL_SET, current->cap_effective) ||
+ (bprm->e_uid != 0) || (current->uid != 0) ||
+ issecure(SECURE_NOROOT))
+ audit_log_bprm_fcaps(bprm, &pP, &pE);
+ }
current->securebits &= ~issecure_mask(SECURE_KEEP_CAPS);
}