Date: Mon, 11 May 2020 15:17:57 +0000 (UTC) From: Mark Johnston <markj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r360895 - stable/12/sys/kern Message-ID: <202005111517.04BFHvoi006132@repo.freebsd.org>
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Author: markj Date: Mon May 11 15:17:57 2020 New Revision: 360895 URL: https://svnweb.freebsd.org/changeset/base/360895 Log: MFC r360378: Avoid returning POLLIN if the pipe descriptor is not open for reading. Modified: stable/12/sys/kern/sys_pipe.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/kern/sys_pipe.c ============================================================================== --- stable/12/sys/kern/sys_pipe.c Mon May 11 08:40:33 2020 (r360894) +++ stable/12/sys/kern/sys_pipe.c Mon May 11 15:17:57 2020 (r360895) @@ -1432,7 +1432,8 @@ pipe_poll(struct file *fp, int events, struct ucred *a if ((events & POLLINIGNEOF) == 0) { if (rpipe->pipe_state & PIPE_EOF) { - revents |= (events & (POLLIN | POLLRDNORM)); + if (fp->f_flag & FREAD) + revents |= (events & (POLLIN | POLLRDNORM)); if (wpipe->pipe_present != PIPE_ACTIVE || (wpipe->pipe_state & PIPE_EOF)) revents |= POLLHUP;
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