Like other ktrace functions make ktruser() callable without kernel lock

by takeing the lock around ktrwrite2().
OK miod@ cheloha@

diff --git a/sys/kern/kern_ktrace.c b/sys/kern/kern_ktrace.c
index 8f30492..1686098 100644 (file)
--- a/sys/kern/kern_ktrace.c
+++ b/sys/kern/kern_ktrace.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: kern_ktrace.c,v 1.110 2023/02/09 08:00:31 guenther Exp $      */
+/*     $OpenBSD: kern_ktrace.c,v 1.111 2023/02/16 08:50:57 claudio Exp $       */
 /*     $NetBSD: kern_ktrace.c,v 1.23 1996/02/09 18:59:36 christos Exp $        */
 
 /*
@@ -335,8 +335,11 @@ ktruser(struct proc *p, const char *id, const void *addr, size_t len)
                else
                        memp = stkbuf;
                error = copyin(addr, memp, len);
-               if (error == 0)
+               if (error == 0) {
+                       KERNEL_LOCK();
                        ktrwrite2(p, &kth, &ktp, sizeof(ktp), memp, len);
+                       KERNEL_UNLOCK();
+               }
                if (memp != stkbuf)
                        free(memp, M_TEMP, len);
        }