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From: Adhemerval Zanella <azanella@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc/release/2.32/master] linux: Fix mq_timereceive check for 32 bit fallback code (BZ 29304) Date: Thu, 30 Jun 2022 13:57:15 +0000 (GMT) [thread overview] Message-ID: <20220630135715.C8CFC3842ADD@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=6f8c9dc8bbaf54edf64da3177d82ca5db00cafd3 commit 6f8c9dc8bbaf54edf64da3177d82ca5db00cafd3 Author: Adhemerval Zanella <adhemerval.zanella@linaro.org> Date: Thu Jun 30 09:08:31 2022 -0300 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: --- sysdeps/unix/sysv/linux/mq_timedreceive.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sysdeps/unix/sysv/linux/mq_timedreceive.c b/sysdeps/unix/sysv/linux/mq_timedreceive.c index 728a63d1ec..fda57be19d 100644 --- a/sysdeps/unix/sysv/linux/mq_timedreceive.c +++ b/sysdeps/unix/sysv/linux/mq_timedreceive.c @@ -35,7 +35,7 @@ __mq_timedreceive_time64 (mqd_t mqdes, char *__restrict msg_ptr, size_t msg_len, #else int ret = SYSCALL_CANCEL (mq_timedreceive_time64, mqdes, msg_ptr, msg_len, msg_prio, abs_timeout); - if (ret == 0 || errno != ENOSYS) + if (ret >= 0 || errno != ENOSYS) return ret; struct timespec ts32;
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