From: Greg Kroah-Hartman <gregkh@linuxfoundation•org>
To: linux-kernel@vger•kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation•org>,
stable@vger•kernel.org, netdev@vger•kernel.org,
"David S. Miller" <davem@davemloft•net>,
Eric Dumazet <edumazet@google•com>, Arnd Bergmann <arnd@arndb•de>
Subject: [PATCH 4.14 46/71] af_unix: add compat_ioctl support
Date: Fri, 17 Jan 2020 00:18:44 +0100 [thread overview]
Message-ID: <20200116231716.118855040@linuxfoundation.org> (raw)
In-Reply-To: <20200116231709.377772748@linuxfoundation.org>
From: Arnd Bergmann <arnd@arndb•de>
commit 5f6beb9e0f633f3cc845cdd67973c506372931b4 upstream.
The af_unix protocol family has a custom ioctl command (inexplicibly
based on SIOCPROTOPRIVATE), but never had a compat_ioctl handler for
32-bit applications.
Since all commands are compatible here, add a trivial wrapper that
performs the compat_ptr() conversion for SIOCOUTQ/SIOCINQ. SIOCUNIXFILE
does not use the argument, but it doesn't hurt to also use compat_ptr()
here.
Fixes: ba94f3088b79 ("unix: add ioctl to open a unix socket file with O_PATH")
Cc: netdev@vger•kernel.org
Cc: "David S. Miller" <davem@davemloft•net>
Cc: Eric Dumazet <edumazet@google•com>
Signed-off-by: Arnd Bergmann <arnd@arndb•de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation•org>
---
net/unix/af_unix.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -644,6 +644,9 @@ static unsigned int unix_poll(struct fil
static unsigned int unix_dgram_poll(struct file *, struct socket *,
poll_table *);
static int unix_ioctl(struct socket *, unsigned int, unsigned long);
+#ifdef CONFIG_COMPAT
+static int unix_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
+#endif
static int unix_shutdown(struct socket *, int);
static int unix_stream_sendmsg(struct socket *, struct msghdr *, size_t);
static int unix_stream_recvmsg(struct socket *, struct msghdr *, size_t, int);
@@ -685,6 +688,9 @@ static const struct proto_ops unix_strea
.getname = unix_getname,
.poll = unix_poll,
.ioctl = unix_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = unix_compat_ioctl,
+#endif
.listen = unix_listen,
.shutdown = unix_shutdown,
.setsockopt = sock_no_setsockopt,
@@ -708,6 +714,9 @@ static const struct proto_ops unix_dgram
.getname = unix_getname,
.poll = unix_dgram_poll,
.ioctl = unix_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = unix_compat_ioctl,
+#endif
.listen = sock_no_listen,
.shutdown = unix_shutdown,
.setsockopt = sock_no_setsockopt,
@@ -730,6 +739,9 @@ static const struct proto_ops unix_seqpa
.getname = unix_getname,
.poll = unix_dgram_poll,
.ioctl = unix_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = unix_compat_ioctl,
+#endif
.listen = unix_listen,
.shutdown = unix_shutdown,
.setsockopt = sock_no_setsockopt,
@@ -2650,6 +2662,13 @@ static int unix_ioctl(struct socket *soc
return err;
}
+#ifdef CONFIG_COMPAT
+static int unix_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ return unix_ioctl(sock, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
static unsigned int unix_poll(struct file *file, struct socket *sock, poll_table *wait)
{
struct sock *sk = sock->sk;
next parent reply other threads:[~2020-01-16 23:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200116231709.377772748@linuxfoundation.org>
2020-01-16 23:18 ` Greg Kroah-Hartman [this message]
2020-01-16 23:18 ` [PATCH 4.14 47/71] compat_ioctl: handle SIOCOUTQNSD Greg Kroah-Hartman
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