netdev - [PATCH net-next v2 02/11] sock: Make sk

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 16 Dec 2019 16:24:46 -0800
From:   Mat Martineau <mathew.j.martineau@...ux.intel.com>
To:     netdev@...r.kernel.org, mptcp@...ts.01.org
Cc:     Mat Martineau <mathew.j.martineau@...ux.intel.com>,
        Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH net-next v2 02/11] sock: Make sk_protocol a 16-bit value

Match the 16-bit width of skbuff->protocol. Fills an 8-bit hole so
sizeof(struct sock) does not change.

Co-developed-by: Paolo Abeni <pabeni@...hat.com>
Signed-off-by: Paolo Abeni <pabeni@...hat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>
---

Changes for v2:

Moved sk_pacing_shift back to a regular struct member, adjacent to the
bitfield. gcc then packs the bitfield and the u8 in a single 32-bit word.


 include/net/sock.h          | 4 ++--
 include/trace/events/sock.h | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/net/sock.h b/include/net/sock.h
index 81dc811aad2e..0930f46c600c 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -456,10 +456,10 @@ struct sock {
 				sk_no_check_tx : 1,
 				sk_no_check_rx : 1,
 				sk_userlocks : 4,
-				sk_protocol  : 8,
 				sk_type      : 16;
-	u16			sk_gso_max_segs;
 	u8			sk_pacing_shift;
+	u16			sk_protocol;
+	u16			sk_gso_max_segs;
 	unsigned long	        sk_lingertime;
 	struct proto		*sk_prot_creator;
 	rwlock_t		sk_callback_lock;
diff --git a/include/trace/events/sock.h b/include/trace/events/sock.h
index 51fe9f6719eb..3ff12b90048d 100644
--- a/include/trace/events/sock.h
+++ b/include/trace/events/sock.h
@@ -147,7 +147,7 @@ TRACE_EVENT(inet_sock_set_state,
 		__field(__u16, sport)
 		__field(__u16, dport)
 		__field(__u16, family)
-		__field(__u8, protocol)
+		__field(__u16, protocol)
 		__array(__u8, saddr, 4)
 		__array(__u8, daddr, 4)
 		__array(__u8, saddr_v6, 16)
-- 
2.24.1