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Ensure that we always return a null terminated string if the user

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passed us a name buffer smaller than the thread name.

ok deraadt@
This commit is contained in:
kurt
2025-12-03 17:06:48 +00:00
parent 75e4855f27
commit 39ee57c105
1 changed files with 5 additions and 2 deletions
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7
lib/librthread/rthread_np.c
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@@ -1,4 +1,4 @@
/* $OpenBSD: rthread_np.c,v 1.25 2025/10/30 13:21:29 miod Exp $ */ /* $OpenBSD: rthread_np.c,v 1.26 2025/12/03 17:06:48 kurt Exp $ */
/* /*
* Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org> * Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org>
* Copyright (c) 2005 Otto Moerbeek <otto@openbsd.org> * Copyright (c) 2005 Otto Moerbeek <otto@openbsd.org>
@@ -53,10 +53,13 @@ void
pthread_get_name_np(pthread_t thread, char *name, size_t len) pthread_get_name_np(pthread_t thread, char *name, size_t len)
{ {
pid_t tid = 0; pid_t tid = 0;
int ret;
if (thread != pthread_self()) if (thread != pthread_self())
tid = thread->tib->tib_tid; tid = thread->tib->tib_tid;
getthrname(tid, name, len); ret = getthrname(tid, name, len);
if (ret == ERANGE && len > 0)
name[len-1] = '\0';
} }
int int