diff options
| author | Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> | 2015-12-04 15:14:04 -0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-01-22 20:54:12 -0800 |
| commit | 2e2b937a300e338bbe6c131181a97af17a9eb15e (patch) | |
| tree | deff81c9f14282f551c9273b7f5acaa460bee2a0 | |
| parent | 497d78eab755c11adf31fbb3fdbaf27c16f758aa (diff) | |
| download | lwn-2e2b937a300e338bbe6c131181a97af17a9eb15e.tar.gz lwn-2e2b937a300e338bbe6c131181a97af17a9eb15e.zip | |
sctp: update the netstamp_needed counter when copying sockets
[ 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@google.com>
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | include/net/sock.h | 2 | ||||
| -rw-r--r-- | net/core/sock.c | 2 | ||||
| -rw-r--r-- | net/sctp/socket.c | 3 |
3 files changed, 5 insertions, 2 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index ed01a012f8d5..ec468b0c4e99 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -722,6 +722,8 @@ 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; diff --git a/net/core/sock.c b/net/core/sock.c index dc30dc5bb1b8..6c5aab35c42c 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -421,8 +421,6 @@ static void sock_warn_obsolete_bsdism(const char *name) } } -#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) { diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 66d796075050..3a1cb52665ae 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -7207,6 +7207,9 @@ void sctp_copy_sock(struct sock *newsk, struct sock *sk, 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, |