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authorEric Dumazet <edumazet@google.com>2023-09-22 06:42:16 +0300
committerDavid S. Miller <davem@davemloft.net>2023-10-01 21:39:18 +0300
commite08d0b3d172311e2bb500865c0d0038533d0ff11 (patch)
tree0c5343300213611a52bf2904f1aa129567929171 /net/dccp
parentceaa714138a372ac63cc2c5c19ee0882d22827f9 (diff)
downloadlinux-e08d0b3d172311e2bb500865c0d0038533d0ff11.tar.xz
inet: implement lockless IP_TOS
Some reads of inet->tos are racy. Add needed READ_ONCE() annotations and convert IP_TOS option lockless. v2: missing changes in include/net/route.h (David Ahern) Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp')
-rw-r--r--net/dccp/ipv4.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 69453b936bd5..1b8cbfda6e5d 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -511,7 +511,7 @@ static int dccp_v4_send_response(const struct sock *sk, struct request_sock *req
err = ip_build_and_send_pkt(skb, sk, ireq->ir_loc_addr,
ireq->ir_rmt_addr,
rcu_dereference(ireq->ireq_opt),
- inet_sk(sk)->tos);
+ READ_ONCE(inet_sk(sk)->tos));
rcu_read_unlock();
err = net_xmit_eval(err);
}