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-rw-r--r--net/core/datagram.c14
-rw-r--r--net/core/dev.c6
-rw-r--r--net/core/dev_ioctl.c2
-rw-r--r--net/core/filter.c10
-rw-r--r--net/core/netpoll.c2
-rw-r--r--net/core/skbuff.c13
6 files changed, 29 insertions, 18 deletions
diff --git a/net/core/datagram.c b/net/core/datagram.c
index ee5647bd91b3..8c2f4489ff8f 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -169,14 +169,20 @@ struct sk_buff *__skb_try_recv_from_queue(struct sock *sk,
int *peeked, int *off, int *err,
struct sk_buff **last)
{
+ bool peek_at_off = false;
struct sk_buff *skb;
- int _off = *off;
+ int _off = 0;
+
+ if (unlikely(flags & MSG_PEEK && *off >= 0)) {
+ peek_at_off = true;
+ _off = *off;
+ }
*last = queue->prev;
skb_queue_walk(queue, skb) {
if (flags & MSG_PEEK) {
- if (_off >= skb->len && (skb->len || _off ||
- skb->peeked)) {
+ if (peek_at_off && _off >= skb->len &&
+ (_off || skb->peeked)) {
_off -= skb->len;
continue;
}
@@ -356,7 +362,7 @@ int __sk_queue_drop_skb(struct sock *sk, struct sk_buff_head *sk_queue,
if (flags & MSG_PEEK) {
err = -ENOENT;
spin_lock_bh(&sk_queue->lock);
- if (skb == skb_peek(sk_queue)) {
+ if (skb->next) {
__skb_unlink(skb, sk_queue);
refcount_dec(&skb->users);
if (destructor)
diff --git a/net/core/dev.c b/net/core/dev.c
index 8515f8fe0460..86b4b0a79e7a 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2739,7 +2739,7 @@ static inline bool skb_needs_check(struct sk_buff *skb, bool tx_path)
{
if (tx_path)
return skb->ip_summed != CHECKSUM_PARTIAL &&
- skb->ip_summed != CHECKSUM_NONE;
+ skb->ip_summed != CHECKSUM_UNNECESSARY;
return skb->ip_summed == CHECKSUM_NONE;
}
@@ -5289,6 +5289,7 @@ static void busy_poll_stop(struct napi_struct *napi, void *have_poll_lock)
* Ideally, a new ndo_busy_poll_stop() could avoid another round.
*/
rc = napi->poll(napi, BUSY_POLL_BUDGET);
+ trace_napi_poll(napi, rc, BUSY_POLL_BUDGET);
netpoll_poll_unlock(have_poll_lock);
if (rc == BUSY_POLL_BUDGET)
__napi_schedule(napi);
@@ -5667,12 +5668,13 @@ EXPORT_SYMBOL(netdev_has_upper_dev_all_rcu);
* Find out if a device is linked to an upper device and return true in case
* it is. The caller must hold the RTNL lock.
*/
-static bool netdev_has_any_upper_dev(struct net_device *dev)
+bool netdev_has_any_upper_dev(struct net_device *dev)
{
ASSERT_RTNL();
return !list_empty(&dev->adj_list.upper);
}
+EXPORT_SYMBOL(netdev_has_any_upper_dev);
/**
* netdev_master_upper_dev_get - Get master upper device
diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c
index 06b147d7d9e2..709a4e6fb447 100644
--- a/net/core/dev_ioctl.c
+++ b/net/core/dev_ioctl.c
@@ -263,6 +263,8 @@ static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
return dev_set_mtu(dev, ifr->ifr_mtu);
case SIOCSIFHWADDR:
+ if (dev->addr_len > sizeof(struct sockaddr))
+ return -EINVAL;
return dev_set_mac_address(dev, &ifr->ifr_hwaddr);
case SIOCSIFHWBROADCAST:
diff --git a/net/core/filter.c b/net/core/filter.c
index f44fc22fd45a..169974998c76 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -2836,15 +2836,12 @@ BPF_CALL_5(bpf_setsockopt, struct bpf_sock_ops_kern *, bpf_sock,
sk->sk_prot->setsockopt == tcp_setsockopt) {
if (optname == TCP_CONGESTION) {
char name[TCP_CA_NAME_MAX];
+ bool reinit = bpf_sock->op > BPF_SOCK_OPS_NEEDS_ECN;
strncpy(name, optval, min_t(long, optlen,
TCP_CA_NAME_MAX-1));
name[TCP_CA_NAME_MAX-1] = 0;
- ret = tcp_set_congestion_control(sk, name, false);
- if (!ret && bpf_sock->op > BPF_SOCK_OPS_NEEDS_ECN)
- /* replacing an existing ca */
- tcp_reinit_congestion_control(sk,
- inet_csk(sk)->icsk_ca_ops);
+ ret = tcp_set_congestion_control(sk, name, false, reinit);
} else {
struct tcp_sock *tp = tcp_sk(sk);
@@ -2872,7 +2869,6 @@ BPF_CALL_5(bpf_setsockopt, struct bpf_sock_ops_kern *, bpf_sock,
ret = -EINVAL;
}
}
- ret = -EINVAL;
#endif
} else {
ret = -EINVAL;
@@ -3505,6 +3501,7 @@ static u32 bpf_convert_ctx_access(enum bpf_access_type type,
bpf_target_off(struct sk_buff, tc_index, 2,
target_size));
#else
+ *target_size = 2;
if (type == BPF_WRITE)
*insn++ = BPF_MOV64_REG(si->dst_reg, si->dst_reg);
else
@@ -3520,6 +3517,7 @@ static u32 bpf_convert_ctx_access(enum bpf_access_type type,
*insn++ = BPF_JMP_IMM(BPF_JGE, si->dst_reg, MIN_NAPI_ID, 1);
*insn++ = BPF_MOV64_IMM(si->dst_reg, 0);
#else
+ *target_size = 4;
*insn++ = BPF_MOV64_IMM(si->dst_reg, 0);
#endif
break;
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 8357f164c660..912731bed7b7 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -666,7 +666,7 @@ int netpoll_setup(struct netpoll *np)
int err;
rtnl_lock();
- if (np->dev_name) {
+ if (np->dev_name[0]) {
struct net *net = current->nsproxy->net_ns;
ndev = __dev_get_by_name(net, np->dev_name);
}
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index f990eb8b30a9..e07556606284 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1363,18 +1363,20 @@ struct sk_buff *skb_copy_expand(const struct sk_buff *skb,
EXPORT_SYMBOL(skb_copy_expand);
/**
- * skb_pad - zero pad the tail of an skb
+ * __skb_pad - zero pad the tail of an skb
* @skb: buffer to pad
* @pad: space to pad
+ * @free_on_error: free buffer on error
*
* Ensure that a buffer is followed by a padding area that is zero
* filled. Used by network drivers which may DMA or transfer data
* beyond the buffer end onto the wire.
*
- * May return error in out of memory cases. The skb is freed on error.
+ * May return error in out of memory cases. The skb is freed on error
+ * if @free_on_error is true.
*/
-int skb_pad(struct sk_buff *skb, int pad)
+int __skb_pad(struct sk_buff *skb, int pad, bool free_on_error)
{
int err;
int ntail;
@@ -1403,10 +1405,11 @@ int skb_pad(struct sk_buff *skb, int pad)
return 0;
free_skb:
- kfree_skb(skb);
+ if (free_on_error)
+ kfree_skb(skb);
return err;
}
-EXPORT_SYMBOL(skb_pad);
+EXPORT_SYMBOL(__skb_pad);
/**
* pskb_put - add data to the tail of a potentially fragmented buffer
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