diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-09-12 12:17:24 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2023-09-14 17:16:36 +0300 |
| commit | e1dc0615c6b08ef36414f08c011965b8fb56198b (patch) | |
| tree | 146013171a93e03ec8d322c189bd82fc615922ab /net/ipv4/udp.c | |
| parent | bcbc1b1de884647aa0318bf74eb7f293d72a1e40 (diff) | |
| download | linux-e1dc0615c6b08ef36414f08c011965b8fb56198b.tar.xz | |
udp: move udp->gro_enabled to udp->udp_flags
syzbot reported that udp->gro_enabled can be read locklessly.
Use one atomic bit from udp->udp_flags.
Fixes: e20cf8d3f1f7 ("udp: implement GRO for plain UDP sockets.")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'net/ipv4/udp.c')
| -rw-r--r-- | net/ipv4/udp.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index cb32826a1db2..1debc10a0f02 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -1868,7 +1868,7 @@ try_again: (struct sockaddr *)sin); } - if (udp_sk(sk)->gro_enabled) + if (udp_test_bit(GRO_ENABLED, sk)) udp_cmsg_recv(msg, sk, skb); if (inet_cmsg_flags(inet)) @@ -2713,7 +2713,7 @@ int udp_lib_setsockopt(struct sock *sk, int level, int optname, /* when enabling GRO, accept the related GSO packet type */ if (valbool) udp_tunnel_encap_enable(sk->sk_socket); - up->gro_enabled = valbool; + udp_assign_bit(GRO_ENABLED, sk, valbool); up->accept_udp_l4 = valbool; release_sock(sk); break; @@ -2803,7 +2803,7 @@ int udp_lib_getsockopt(struct sock *sk, int level, int optname, break; case UDP_GRO: - val = up->gro_enabled; + val = udp_test_bit(GRO_ENABLED, sk); break; /* The following two cannot be changed on UDP sockets, the return is |