diff options
Diffstat (limited to 'security/commoncap.c')
| -rw-r--r-- | security/commoncap.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/security/commoncap.c b/security/commoncap.c index d7eff5797b91..d45393380997 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); } |