From: Al Viro <viro@zeniv.linux.org.uk>
To: Sargun Dhillon <sargun@sargun.me>
Cc: LKML <linux-kernel@vger.kernel.org>,
Linux Containers <containers@lists.linux-foundation.org>,
Linux API <linux-api@vger.kernel.org>,
Christian Brauner <christian.brauner@ubuntu.com>,
Tycho Andersen <tycho@tycho.ws>,
Kees Cook <keescook@chromium.org>,
Aleksa Sarai <cyphar@cyphar.com>,
Jeffrey Vander Stoep <jeffv@google.com>,
Jann Horn <jannh@google.com>, Robert Sesek <rsesek@google.com>,
Chris Palmer <palmer@google.com>,
Matt Denton <mpdenton@google.com>,
Kees Cook <keescook@google.com>
Subject: Re: [PATCH 2/5] seccomp: Introduce addfd ioctl to seccomp user notifier
Date: Mon, 25 May 2020 01:39:19 +0100 [thread overview]
Message-ID: <20200525003919.GC23230@ZenIV.linux.org.uk> (raw)
In-Reply-To: <CAMp4zn-F3b8Z4ZDjgnJM1Fbban2oVtCm_rZkhBhDKs6fw2_=rg@mail.gmail.com>
On Sun, May 24, 2020 at 05:27:58PM -0700, Sargun Dhillon wrote:
> > if (addfd->fd >= 0) {
> > ret = replace_fd(addfd->fd, addfd->file, addfd->flags);
> > } else {
> > ret = get_unused_fd_flags(addfd->flags);
> > if (ret >= 0)
> > fd_install(ret, get_file(addfd->file));
^^^^^^^^
> Wouldn't this result in consumption of reference in one case (fd_install),
> and the fd still having a reference in the replace_fd case?
next prev parent reply other threads:[~2020-05-25 0:39 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-24 23:39 [PATCH 0/5] Add seccomp notifier ioctl that enables adding fds Sargun Dhillon
2020-05-24 23:39 ` [PATCH 1/5] seccomp: Add find_notification helper Sargun Dhillon
2020-05-24 23:55 ` Tycho Andersen
2020-05-25 13:26 ` Christian Brauner
2020-05-24 23:39 ` [PATCH 2/5] seccomp: Introduce addfd ioctl to seccomp user notifier Sargun Dhillon
2020-05-24 23:57 ` Tycho Andersen
2020-05-24 23:58 ` Tycho Andersen
2020-05-25 0:05 ` Al Viro
2020-05-25 0:27 ` Sargun Dhillon
2020-05-25 0:39 ` Al Viro [this message]
2020-05-25 13:50 ` Christian Brauner
2020-05-26 6:59 ` Sargun Dhillon
2020-05-26 8:22 ` Christian Brauner
2020-05-24 23:39 ` [PATCH 3/5] selftests/seccomp: Test SECCOMP_IOCTL_NOTIF_ADDFD Sargun Dhillon
2020-05-24 23:39 ` [PATCH 4/5] seccomp: Add SECCOMP_ADDFD_FLAG_MOVE flag to add fd ioctl Sargun Dhillon
2020-05-25 14:20 ` Christian Brauner
2020-05-26 6:08 ` Sargun Dhillon
2020-05-24 23:39 ` [PATCH 5/5] selftests/seccomp: Add test for addfd move semantics Sargun Dhillon
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