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-rw-r--r--net/packet/af_packet.c28
-rw-r--r--net/packet/diag.c6
-rw-r--r--net/packet/internal.h26
3 files changed, 39 insertions, 21 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 6fa0a9a45..fb165286e 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1955,7 +1955,7 @@ retry:
goto retry;
}
- if (!dev_validate_header(dev, skb->data, len)) {
+ if (!dev_validate_header(dev, skb->data, len) || !skb->len) {
err = -EINVAL;
goto out_unlock;
}
@@ -2105,7 +2105,7 @@ static int packet_rcv(struct sk_buff *skb, struct net_device *dev,
sll = &PACKET_SKB_CB(skb)->sa.ll;
sll->sll_hatype = dev->type;
sll->sll_pkttype = skb->pkt_type;
- if (unlikely(po->origdev))
+ if (unlikely(packet_sock_flag(po, PACKET_SOCK_ORIGDEV)))
sll->sll_ifindex = orig_dev->ifindex;
else
sll->sll_ifindex = dev->ifindex;
@@ -2371,7 +2371,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
sll->sll_hatype = dev->type;
sll->sll_protocol = skb->protocol;
sll->sll_pkttype = skb->pkt_type;
- if (unlikely(po->origdev))
+ if (unlikely(packet_sock_flag(po, PACKET_SOCK_ORIGDEV)))
sll->sll_ifindex = orig_dev->ifindex;
else
sll->sll_ifindex = dev->ifindex;
@@ -3117,6 +3117,9 @@ static int packet_do_bind(struct sock *sk, const char *name, int ifindex,
lock_sock(sk);
spin_lock(&po->bind_lock);
+ if (!proto)
+ proto = po->num;
+
rcu_read_lock();
if (po->fanout) {
@@ -3219,7 +3222,7 @@ static int packet_bind_spkt(struct socket *sock, struct sockaddr *uaddr,
memcpy(name, uaddr->sa_data, sizeof(uaddr->sa_data));
name[sizeof(uaddr->sa_data)] = 0;
- return packet_do_bind(sk, name, 0, pkt_sk(sk)->num);
+ return packet_do_bind(sk, name, 0, 0);
}
static int packet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
@@ -3236,8 +3239,7 @@ static int packet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len
if (sll->sll_family != AF_PACKET)
return -EINVAL;
- return packet_do_bind(sk, NULL, sll->sll_ifindex,
- sll->sll_protocol ? : pkt_sk(sk)->num);
+ return packet_do_bind(sk, NULL, sll->sll_ifindex, sll->sll_protocol);
}
static struct proto packet_proto = {
@@ -3444,7 +3446,7 @@ static int packet_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
memcpy(msg->msg_name, &PACKET_SKB_CB(skb)->sa, copy_len);
}
- if (pkt_sk(sk)->auxdata) {
+ if (packet_sock_flag(pkt_sk(sk), PACKET_SOCK_AUXDATA)) {
struct tpacket_auxdata aux;
aux.tp_status = TP_STATUS_USER;
@@ -3827,9 +3829,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (copy_from_user(&val, optval, sizeof(val)))
return -EFAULT;
- lock_sock(sk);
- po->auxdata = !!val;
- release_sock(sk);
+ packet_sock_flag_set(po, PACKET_SOCK_AUXDATA, val);
return 0;
}
case PACKET_ORIGDEV:
@@ -3841,9 +3841,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (copy_from_user(&val, optval, sizeof(val)))
return -EFAULT;
- lock_sock(sk);
- po->origdev = !!val;
- release_sock(sk);
+ packet_sock_flag_set(po, PACKET_SOCK_ORIGDEV, val);
return 0;
}
case PACKET_VNET_HDR:
@@ -3973,10 +3971,10 @@ static int packet_getsockopt(struct socket *sock, int level, int optname,
break;
case PACKET_AUXDATA:
- val = po->auxdata;
+ val = packet_sock_flag(po, PACKET_SOCK_AUXDATA);
break;
case PACKET_ORIGDEV:
- val = po->origdev;
+ val = packet_sock_flag(po, PACKET_SOCK_ORIGDEV);
break;
case PACKET_VNET_HDR:
val = po->has_vnet_hdr;
diff --git a/net/packet/diag.c b/net/packet/diag.c
index 7ef1c881a..ecabf78d2 100644
--- a/net/packet/diag.c
+++ b/net/packet/diag.c
@@ -22,9 +22,9 @@ static int pdiag_put_info(const struct packet_sock *po, struct sk_buff *nlskb)
pinfo.pdi_flags = 0;
if (po->running)
pinfo.pdi_flags |= PDI_RUNNING;
- if (po->auxdata)
+ if (packet_sock_flag(po, PACKET_SOCK_AUXDATA))
pinfo.pdi_flags |= PDI_AUXDATA;
- if (po->origdev)
+ if (packet_sock_flag(po, PACKET_SOCK_ORIGDEV))
pinfo.pdi_flags |= PDI_ORIGDEV;
if (po->has_vnet_hdr)
pinfo.pdi_flags |= PDI_VNETHDR;
@@ -142,7 +142,7 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
rp = nlmsg_data(nlh);
rp->pdiag_family = AF_PACKET;
rp->pdiag_type = sk->sk_type;
- rp->pdiag_num = ntohs(po->num);
+ rp->pdiag_num = ntohs(READ_ONCE(po->num));
rp->pdiag_ino = sk_ino;
sock_diag_save_cookie(sk, rp->pdiag_cookie);
diff --git a/net/packet/internal.h b/net/packet/internal.h
index f10294800..3d871cae8 100644
--- a/net/packet/internal.h
+++ b/net/packet/internal.h
@@ -115,10 +115,9 @@ struct packet_sock {
int copy_thresh;
spinlock_t bind_lock;
struct mutex pg_vec_lock;
+ unsigned long flags;
unsigned int running; /* bind_lock must be held */
- unsigned int auxdata:1, /* writer must hold sock lock */
- origdev:1,
- has_vnet_hdr:1,
+ unsigned int has_vnet_hdr:1, /* writer must hold sock lock */
tp_loss:1,
tp_tx_has_off:1;
int pressure;
@@ -142,4 +141,25 @@ static struct packet_sock *pkt_sk(struct sock *sk)
return (struct packet_sock *)sk;
}
+enum packet_sock_flags {
+ PACKET_SOCK_ORIGDEV,
+ PACKET_SOCK_AUXDATA,
+};
+
+static inline void packet_sock_flag_set(struct packet_sock *po,
+ enum packet_sock_flags flag,
+ bool val)
+{
+ if (val)
+ set_bit(flag, &po->flags);
+ else
+ clear_bit(flag, &po->flags);
+}
+
+static inline bool packet_sock_flag(const struct packet_sock *po,
+ enum packet_sock_flags flag)
+{
+ return test_bit(flag, &po->flags);
+}
+
#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 07:29:18 +0000