From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Thu, 30 Jun 2022 12:08:31 +0000 (-0300)
Subject: linux: Fix mq_timereceive check for 32 bit fallback code (BZ 29304)
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d44e1a0740066416d3c331a3022ead5a7c4155ad;p=thirdparty%2Fglibc.git

linux: Fix mq_timereceive check for 32 bit fallback code (BZ 29304)

On  success,  mq_receive() and mq_timedreceive() return the number of
bytes in the received message, so it requires to check if the value
is larger than 0.

Checked on i686-linux-gnu.

(cherry picked from commit 71d87d85bf54f6522813aec97c19bdd24997341e)
---

diff --git a/sysdeps/unix/sysv/linux/mq_timedreceive.c b/sysdeps/unix/sysv/linux/mq_timedreceive.c
index eb948ccc182..d3dde7a586c 100644
--- a/sysdeps/unix/sysv/linux/mq_timedreceive.c
+++ b/sysdeps/unix/sysv/linux/mq_timedreceive.c
@@ -33,7 +33,7 @@ __mq_timedreceive_time64 (mqd_t mqdes, char *__restrict msg_ptr, size_t msg_len,
                             msg_prio, abs_timeout);
 
 #ifndef __ASSUME_TIME64_SYSCALLS
-  if (ret == 0 || errno != ENOSYS)
+  if (ret >= 0 || errno != ENOSYS)
     return ret;
 
   struct timespec ts32;