6.1-stable review patch. If anyone has any objections, please let me know.
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From: Eric Dumazet edumazet@google.com
[ Upstream commit f5f52f0884a595ff99ab1a608643fe4025fca2d5 ]
These are read locklessly, move them to udp_flags to fix data-races.
Signed-off-by: Eric Dumazet edumazet@google.com Reviewed-by: Willem de Bruijn willemb@google.com Signed-off-by: Paolo Abeni pabeni@redhat.com Stable-dep-of: 70a36f571362 ("udp: annotate data-races around udp->encap_type") Signed-off-by: Sasha Levin sashal@kernel.org --- include/linux/udp.h | 16 +++++++++------- net/ipv4/udp.c | 2 +- 2 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/include/linux/udp.h b/include/linux/udp.h index f87e2123fe7b0..0e6880856246a 100644 --- a/include/linux/udp.h +++ b/include/linux/udp.h @@ -35,6 +35,8 @@ enum { UDP_FLAGS_NO_CHECK6_TX, /* Send zero UDP6 checksums on TX? */ UDP_FLAGS_NO_CHECK6_RX, /* Allow zero UDP6 checksums on RX? */ UDP_FLAGS_GRO_ENABLED, /* Request GRO aggregation */ + UDP_FLAGS_ACCEPT_FRAGLIST, + UDP_FLAGS_ACCEPT_L4, };
struct udp_sock { @@ -48,13 +50,11 @@ struct udp_sock {
int pending; /* Any pending frames ? */ __u8 encap_type; /* Is this an Encapsulation socket? */ - unsigned char encap_enabled:1, /* This socket enabled encap + unsigned char encap_enabled:1; /* This socket enabled encap * processing; UDP tunnels and * different encapsulation layer set * this */ - accept_udp_l4:1, - accept_udp_fraglist:1; /* indicator bits used by pcflag: */ #define UDPLITE_BIT 0x1 /* set by udplite proto init function */ #define UDPLITE_SEND_CC 0x2 /* set via udplite setsockopt */ @@ -146,10 +146,12 @@ static inline bool udp_unexpected_gso(struct sock *sk, struct sk_buff *skb) if (!skb_is_gso(skb)) return false;
- if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4 && !udp_sk(sk)->accept_udp_l4) + if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4 && + !udp_test_bit(ACCEPT_L4, sk)) return true;
- if (skb_shinfo(skb)->gso_type & SKB_GSO_FRAGLIST && !udp_sk(sk)->accept_udp_fraglist) + if (skb_shinfo(skb)->gso_type & SKB_GSO_FRAGLIST && + !udp_test_bit(ACCEPT_FRAGLIST, sk)) return true;
return false; @@ -157,8 +159,8 @@ static inline bool udp_unexpected_gso(struct sock *sk, struct sk_buff *skb)
static inline void udp_allow_gso(struct sock *sk) { - udp_sk(sk)->accept_udp_l4 = 1; - udp_sk(sk)->accept_udp_fraglist = 1; + udp_set_bit(ACCEPT_L4, sk); + udp_set_bit(ACCEPT_FRAGLIST, sk); }
#define udp_portaddr_for_each_entry(__sk, list) \ diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 28292fcf07075..df0ea45b8b8f2 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -2731,7 +2731,7 @@ int udp_lib_setsockopt(struct sock *sk, int level, int optname, if (valbool) udp_tunnel_encap_enable(sk->sk_socket); udp_assign_bit(GRO_ENABLED, sk, valbool); - up->accept_udp_l4 = valbool; + udp_assign_bit(ACCEPT_L4, sk, valbool); release_sock(sk); break;