From: Kees Cook <keescook@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>,
Sargun Dhillon <sargun@sargun.me>,
Christian Brauner <christian@brauner.io>,
Tycho Andersen <tycho@tycho.ws>,
David Laight <David.Laight@ACULAB.COM>,
Christoph Hellwig <hch@lst.de>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Aleksa Sarai <cyphar@cyphar.com>,
Matt Denton <mpdenton@google.com>, Jann Horn <jannh@google.com>,
Chris Palmer <palmer@google.com>,
Robert Sesek <rsesek@google.com>,
Giuseppe Scrivano <gscrivan@redhat.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andy Lutomirski <luto@amacapital.net>,
Will Drewry <wad@chromium.org>, Shuah Khan <shuah@kernel.org>,
netdev@vger.kernel.org, containers@lists.linux-foundation.org,
linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-kselftest@vger.kernel.org
Subject: [PATCH v6 4/7] pidfd: Replace open-coded partial receive_fd()
Date: Mon, 6 Jul 2020 13:17:17 -0700 [thread overview]
Message-ID: <20200706201720.3482959-5-keescook@chromium.org> (raw)
In-Reply-To: <20200706201720.3482959-1-keescook@chromium.org>
The sock counting (sock_update_netprioidx() and sock_update_classid()) was
missing from pidfd's implementation of received fd installation. Replace
the open-coded version with a call to the new receive_fd()
helper.
Thanks to Vamshi K Sthambamkadi <vamshi.k.sthambamkadi@gmail.com> for
catching a missed fput() in an earlier version of this patch.
Fixes: 8649c322f75c ("pid: Implement pidfd_getfd syscall")
Reviewed-by: Sargun Dhillon <sargun@sargun.me>
Signed-off-by: Kees Cook <keescook@chromium.org>
---
kernel/pid.c | 13 ++-----------
1 file changed, 2 insertions(+), 11 deletions(-)
diff --git a/kernel/pid.c b/kernel/pid.c
index f1496b757162..a31c102f4c87 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -635,17 +635,8 @@ static int pidfd_getfd(struct pid *pid, int fd)
if (IS_ERR(file))
return PTR_ERR(file);
- ret = security_file_receive(file);
- if (ret) {
- fput(file);
- return ret;
- }
-
- ret = get_unused_fd_flags(O_CLOEXEC);
- if (ret < 0)
- fput(file);
- else
- fd_install(ret, file);
+ ret = receive_fd(file, O_CLOEXEC);
+ fput(file);
return ret;
}
--
2.25.1
next prev parent reply other threads:[~2020-07-06 20:17 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-06 20:17 [PATCH v6 0/7] Add seccomp notifier ioctl that enables adding fds Kees Cook
2020-07-06 20:17 ` [PATCH v6 1/7] net/scm: Regularize compat handling of scm_detach_fds() Kees Cook
2020-07-07 11:41 ` Christian Brauner
2020-07-08 23:46 ` Kees Cook
2020-07-06 20:17 ` [PATCH v6 2/7] fs: Move __scm_install_fd() to __receive_fd() Kees Cook
2020-07-07 6:49 ` Christoph Hellwig
2020-07-07 11:45 ` Christian Brauner
2020-07-06 20:17 ` [PATCH v6 3/7] fs: Add receive_fd() wrapper for __receive_fd() Kees Cook
2020-07-07 6:49 ` Christoph Hellwig
2020-07-07 11:49 ` Christian Brauner
2020-07-08 23:48 ` Kees Cook
2020-07-06 20:17 ` Kees Cook [this message]
2020-07-07 12:22 ` [PATCH v6 4/7] pidfd: Replace open-coded partial receive_fd() Christian Brauner
2020-07-08 23:49 ` Kees Cook
2020-07-09 6:35 ` Kees Cook
2020-07-09 12:54 ` Christian Brauner
2020-07-06 20:17 ` [PATCH v6 5/7] fs: Expand __receive_fd() to accept existing fd Kees Cook
2020-07-07 12:38 ` Christian Brauner
2020-07-08 23:52 ` Kees Cook
2020-07-06 20:17 ` [PATCH v6 6/7] seccomp: Introduce addfd ioctl to seccomp user notifier Kees Cook
2020-07-07 13:30 ` Christian Brauner
2020-07-09 6:12 ` Kees Cook
2020-07-09 13:08 ` Christian Brauner
2020-07-06 20:17 ` [PATCH v6 7/7] selftests/seccomp: Test SECCOMP_IOCTL_NOTIF_ADDFD Kees Cook
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