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-Tag: glibc-2.36~100
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=71d87d85bf54f6522813aec97c19bdd24997341e;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.
---

diff --git a/sysdeps/unix/sysv/linux/mq_timedreceive.c b/sysdeps/unix/sysv/linux/mq_timedreceive.c
index 834cd7a4843..5bf1e0a83ba 100644
--- a/sysdeps/unix/sysv/linux/mq_timedreceive.c
+++ b/sysdeps/unix/sysv/linux/mq_timedreceive.c
@@ -41,7 +41,7 @@ ___mq_timedreceive_time64 (mqd_t mqdes, char *__restrict msg_ptr, size_t msg_len
     {
       int r = SYSCALL_CANCEL (mq_timedreceive_time64, mqdes, msg_ptr, msg_len,
 			      msg_prio, abs_timeout);
-      if (r == 0 || errno != ENOSYS)
+      if (r >= 0 || errno != ENOSYS)
 	return r;
       __set_errno (EOVERFLOW);
       return -1;