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From: Corinna Vinschen <corinna@sourceware.org> To: cygwin-cvs@sourceware.org Subject: [newlib-cygwin] Cygwin: POSIX mq: only allo priority up to MQ_PRIO_MAX - 1 Date: Thu, 29 Apr 2021 18:14:22 +0000 (GMT) [thread overview] Message-ID: <20210429181422.CD196394C01A@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=4f89f24fbeb5ccfbd7077878a5342bf62f722917 commit 4f89f24fbeb5ccfbd7077878a5342bf62f722917 Author: Corinna Vinschen <corinna@vinschen.de> Date: Thu Apr 29 20:04:24 2021 +0200 Cygwin: POSIX mq: only allo priority up to MQ_PRIO_MAX - 1 POSIX requires that message priorities range from 0 (low) to sysconf(_SC_MQ_PRIO_MAX) - 1 (high). Cygwin's mq_send erroneously allowed a message priority of sysconf(_SC_MQ_PRIO_MAX). Fix it. Signed-off-by: Corinna Vinschen <corinna@vinschen.de> Diff: --- winsup/cygwin/posix_ipc.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/winsup/cygwin/posix_ipc.cc b/winsup/cygwin/posix_ipc.cc index eec9ffe63..c6a003c37 100644 --- a/winsup/cygwin/posix_ipc.cc +++ b/winsup/cygwin/posix_ipc.cc @@ -798,7 +798,7 @@ _mq_send (mqd_t mqd, const char *ptr, size_t len, unsigned int prio, set_errno (EBADF); __leave; } - if (prio > MQ_PRIO_MAX) + if (prio >= MQ_PRIO_MAX) { set_errno (EINVAL); __leave;
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