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authorEric Paris <eparis@redhat.com>2012-10-23 08:58:35 -0400
committerEric Paris <eparis@redhat.com>2013-04-11 15:39:10 -0400
commitad395abece974e50cfd7ddd509a4faae8e238a40 (patch)
tree66a12a3d4a18a6cca40466462cf9737df0f9f0b7 /kernel/auditsc.c
parentf7616102d6f62d51cffb796d4672ad81fef00fea (diff)
downloadlwn-ad395abece974e50cfd7ddd509a4faae8e238a40.tar.gz
lwn-ad395abece974e50cfd7ddd509a4faae8e238a40.zip
Audit: do not print error when LSMs disabled
RHBZ: 785936 If the audit system collects a record about one process sending a signal to another process it includes in that collection the 'secid' or 'an int used to represet an LSM label.' If there is no LSM enabled it will collect a 0. The problem is that when we attempt to print that record we ask the LSM to convert the secid back to a string. Since there is no LSM it returns EOPNOTSUPP. Most code in the audit system checks if the secid is 0 and does not print LSM info in that case. The signal information code however forgot that check. Thus users will see a message in syslog indicating that converting the sid to string failed. Add the right check. Signed-off-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'kernel/auditsc.c')
-rw-r--r--kernel/auditsc.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index b536d22fe56f..67df4ee1d3b6 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1205,12 +1205,14 @@ static int audit_log_pid_context(struct audit_context *context, pid_t pid,
audit_log_format(ab, "opid=%d oauid=%d ouid=%d oses=%d", pid,
from_kuid(&init_user_ns, auid),
from_kuid(&init_user_ns, uid), sessionid);
- if (security_secid_to_secctx(sid, &ctx, &len)) {
- audit_log_format(ab, " obj=(none)");
- rc = 1;
- } else {
- audit_log_format(ab, " obj=%s", ctx);
- security_release_secctx(ctx, len);
+ if (sid) {
+ if (security_secid_to_secctx(sid, &ctx, &len)) {
+ audit_log_format(ab, " obj=(none)");
+ rc = 1;
+ } else {
+ audit_log_format(ab, " obj=%s", ctx);
+ security_release_secctx(ctx, len);
+ }
}
audit_log_format(ab, " ocomm=");
audit_log_untrustedstring(ab, comm);