This is a note to let you know that I've just added the patch titled
sctp: update the netstamp_needed counter when copying sockets
to the 4.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sctp-update-the-netstamp_needed-counter-when-copying-sockets.patch
and it can be found in the queue-4.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Wed Dec 30 19:48:47 PST 2015
From: Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx>
Date: Fri, 4 Dec 2015 15:14:04 -0200
Subject: sctp: update the netstamp_needed counter when copying sockets
From: Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx>
[ Upstream commit 01ce63c90170283a9855d1db4fe81934dddce648 ]
Dmitry Vyukov reported that SCTP was triggering a WARN on socket destroy
related to disabling sock timestamp.
When SCTP accepts an association or peel one off, it copies sock flags
but forgot to call net_enable_timestamp() if a packet timestamping flag
was copied, leading to extra calls to net_disable_timestamp() whenever
such clones were closed.
The fix is to call net_enable_timestamp() whenever we copy a sock with
that flag on, like tcp does.
Reported-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx>
Acked-by: Vlad Yasevich <vyasevich@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/net/sock.h | 2 ++
net/core/sock.c | 2 --
net/sctp/socket.c | 3 +++
3 files changed, 5 insertions(+), 2 deletions(-)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -724,6 +724,8 @@ enum sock_flags {
SOCK_SELECT_ERR_QUEUE, /* Wake select on error queue */
};
+#define SK_FLAGS_TIMESTAMP ((1UL << SOCK_TIMESTAMP) | (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE))
+
static inline void sock_copy_flags(struct sock *nsk, struct sock *osk)
{
nsk->sk_flags = osk->sk_flags;
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -422,8 +422,6 @@ static void sock_warn_obsolete_bsdism(co
}
}
-#define SK_FLAGS_TIMESTAMP ((1UL << SOCK_TIMESTAMP) | (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE))
-
static void sock_disable_timestamp(struct sock *sk, unsigned long flags)
{
if (sk->sk_flags & flags) {
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -7195,6 +7195,9 @@ void sctp_copy_sock(struct sock *newsk,
newinet->mc_ttl = 1;
newinet->mc_index = 0;
newinet->mc_list = NULL;
+
+ if (newsk->sk_flags & SK_FLAGS_TIMESTAMP)
+ net_enable_timestamp();
}
static inline void sctp_copy_descendant(struct sock *sk_to,
Patches currently in stable-queue which might be from marcelo.leitner@xxxxxxxxx are
queue-4.3/sctp-update-the-netstamp_needed-counter-when-copying-sockets.patch
queue-4.3/sctp-also-copy-sk_tsflags-when-copying-the-socket.patch
queue-4.3/sctp-use-the-same-clock-as-if-sock-source-timestamps-were-on.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html