[PATCH] fix pthread_mutexattr_gettype always return 0

[abushwang(王烁)]

From 03481285aff8d0d5a993f1969fb87afc946e2a91 Mon Sep 17 00:00:00 2001
From: Shuo Wang abushwang@tencent.com<mailto:abushwang@tencent.com>
Date: Thu, 2 Mar 2023 14:58:20 +0800
Subject: [PATCH] fix pthread_mutexattr_gettype always return 0

According to posix, pthread_mutexattr_gettype will return EINVAL
when the value specified by attr is invalid.
---
nptl/pthread_mutexattr_gettype.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/nptl/pthread_mutexattr_gettype.c b/nptl/pthread_mutexattr_gettype.c
index 21e0a9e946..ee5ee71a88 100644
--- a/nptl/pthread_mutexattr_gettype.c
+++ b/nptl/pthread_mutexattr_gettype.c
@@ -28,6 +28,9 @@ __pthread_mutexattr_gettype (const pthread_mutexattr_t *attr, int *kind)
   *kind = (iattr->mutexkind & ~PTHREAD_MUTEXATTR_FLAG_BITS
        & ~PTHREAD_MUTEX_NO_ELISION_NP);
+  if (kind < PTHREAD_MUTEX_NORMAL || kind > PTHREAD_MUTEX_ADAPTIVE_NP)
+    return EINVAL;
+
   return 0;
}
versioned_symbol (libc, __pthread_mutexattr_gettype,
--
2.36.1