audit: add support for fcaps v3
V3 namespaced file capabilities were introduced in
commit 8db6c34f1dbc ("Introduce v3 namespaced file capabilities")
Add support for these by adding the "frootid" field to the existing
fcaps fields in the NAME and BPRM_FCAPS records.
Please see github issue
https://github.com/linux-audit/audit-kernel/issues/103
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Acked-by: Serge Hallyn <serge@hallyn.com>
[PM: comment tweak to fit an 80 char line width]
Signed-off-by: Paul Moore <paul@paul-moore.com>
diff --git a/kernel/audit.c b/kernel/audit.c
index 2a32f30..3f3f188 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -2084,8 +2084,9 @@ static void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name)
{
audit_log_cap(ab, "cap_fp", &name->fcap.permitted);
audit_log_cap(ab, "cap_fi", &name->fcap.inheritable);
- audit_log_format(ab, " cap_fe=%d cap_fver=%x",
- name->fcap.fE, name->fcap_ver);
+ audit_log_format(ab, " cap_fe=%d cap_fver=%x cap_frootid=%d",
+ name->fcap.fE, name->fcap_ver,
+ from_kuid(&init_user_ns, name->fcap.rootid));
}
static inline int audit_copy_fcaps(struct audit_names *name,
@@ -2104,6 +2105,7 @@ static inline int audit_copy_fcaps(struct audit_names *name,
name->fcap.permitted = caps.permitted;
name->fcap.inheritable = caps.inheritable;
name->fcap.fE = !!(caps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
+ name->fcap.rootid = caps.rootid;
name->fcap_ver = (caps.magic_etc & VFS_CAP_REVISION_MASK) >>
VFS_CAP_REVISION_SHIFT;
diff --git a/kernel/audit.h b/kernel/audit.h
index 6ffb705..deefdbe 100644
--- a/kernel/audit.h
+++ b/kernel/audit.h
@@ -69,6 +69,7 @@ struct audit_cap_data {
kernel_cap_t effective; /* effective set of process */
};
kernel_cap_t ambient;
+ kuid_t rootid;
};
/* When fs/namei.c:getname() is called, we store the pointer in name and bump
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 572d247..c16beb2 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1358,6 +1358,9 @@ static void audit_log_exit(void)
audit_log_cap(ab, "pi", &axs->new_pcap.inheritable);
audit_log_cap(ab, "pe", &axs->new_pcap.effective);
audit_log_cap(ab, "pa", &axs->new_pcap.ambient);
+ audit_log_format(ab, " frootid=%d",
+ from_kuid(&init_user_ns,
+ axs->fcap.rootid));
break; }
}
@@ -2271,6 +2274,7 @@ int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
ax->fcap.permitted = vcaps.permitted;
ax->fcap.inheritable = vcaps.inheritable;
ax->fcap.fE = !!(vcaps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
+ ax->fcap.rootid = vcaps.rootid;
ax->fcap_ver = (vcaps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT;
ax->old_pcap.permitted = old->cap_permitted;