diff options
| author | Benedikt Spranger <b.spranger@linutronix.de> | 2022-04-08 11:47:45 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-20 09:19:35 +0200 |
| commit | 99a435c3789cbc390f5c1aea40f46a795f41d8b4 (patch) | |
| tree | c1bc2045e84fe9f7f2980bc63d3f58a05f47239c /net | |
| parent | 7e59fdf9547c4f948d1d917ec7ffa5fb5ac53bdb (diff) | |
net/sched: taprio: Check if socket flags are valid
[ Upstream commit e8a64bbaaad1f6548cec5508297bc6d45e8ab69e ]
A user may set the SO_TXTIME socket option to ensure a packet is send
at a given time. The taprio scheduler has to confirm, that it is allowed
to send a packet at that given time, by a check against the packet time
schedule. The scheduler drop the packet, if the gates are closed at the
given send time.
The check, if SO_TXTIME is set, may fail since sk_flags are part of an
union and the union is used otherwise. This happen, if a socket is not
a full socket, like a request socket for example.
Add a check to verify, if the union is used for sk_flags.
Fixes: 4cfd5779bd6e ("taprio: Add support for txtime-assist mode")
Signed-off-by: Benedikt Spranger <b.spranger@linutronix.de>
Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de>
Acked-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sched/sch_taprio.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c index b268e6130451..4c26f7fb32b3 100644 --- a/net/sched/sch_taprio.c +++ b/net/sched/sch_taprio.c @@ -427,7 +427,8 @@ static int taprio_enqueue(struct sk_buff *skb, struct Qdisc *sch, if (unlikely(!child)) return qdisc_drop(skb, sch, to_free); - if (skb->sk && sock_flag(skb->sk, SOCK_TXTIME)) { + /* sk_flags are only safe to use on full sockets. */ + if (skb->sk && sk_fullsock(skb->sk) && sock_flag(skb->sk, SOCK_TXTIME)) { if (!is_valid_interval(skb, sch)) return qdisc_drop(skb, sch, to_free); } else if (TXTIME_ASSIST_IS_ENABLED(q->flags)) { |