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Merge branch 'kfree_skb-NULL'

Browse source 
zhong jiang says:

====================
net: remove redundant null pointer check before kfree_skb

The issue is detected with the help of Coccinelle.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-09-21 09:04:38 -07:00
commit 1ba2a720da
6 changed files with 9 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

3
drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
View file

@ -3422,8 +3422,7 @@ static void remove_one(struct pci_dev *pdev)
free_netdev(adapter->port[i]); free_netdev(adapter->port[i]);
iounmap(adapter->regs); iounmap(adapter->regs);
if (adapter->nofail_skb) kfree_skb(adapter->nofail_skb);
kfree_skb(adapter->nofail_skb);
kfree(adapter); kfree(adapter);
pci_release_regions(pdev); pci_release_regions(pdev);
pci_disable_device(pdev); pci_disable_device(pdev);

3
drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c
View file

@ -1302,8 +1302,7 @@ void cxgb3_offload_deactivate(struct adapter *adapter)
rcu_read_unlock(); rcu_read_unlock();
RCU_INIT_POINTER(tdev->l2opt, NULL); RCU_INIT_POINTER(tdev->l2opt, NULL);
call_rcu(&d->rcu_head, clean_l2_data); call_rcu(&d->rcu_head, clean_l2_data);
if (t->nofail_skb) kfree_skb(t->nofail_skb);
kfree_skb(t->nofail_skb);
kfree(t); kfree(t);
} }

6
drivers/net/tap.c
View file

@ -830,8 +830,7 @@ static ssize_t tap_do_read(struct tap_queue *q,
ssize_t ret = 0; ssize_t ret = 0;
if (!iov_iter_count(to)) { if (!iov_iter_count(to)) {
if (skb) kfree_skb(skb);
kfree_skb(skb);
return 0; return 0;
} }
@ -1236,8 +1235,7 @@ static int tap_recvmsg(struct socket *sock, struct msghdr *m,
struct sk_buff *skb = m->msg_control; struct sk_buff *skb = m->msg_control;
int ret; int ret;
if (flags & ~(MSG_DONTWAIT|MSG_TRUNC)) { if (flags & ~(MSG_DONTWAIT|MSG_TRUNC)) {
if (skb) kfree_skb(skb);
kfree_skb(skb);
return -EINVAL; return -EINVAL;
} }
ret = tap_do_read(q, &m->msg_iter, flags & MSG_DONTWAIT, skb); ret = tap_do_read(q, &m->msg_iter, flags & MSG_DONTWAIT, skb);

3
net/ipv4/ip_fragment.c
View file

@ -260,8 +260,7 @@ out:
spin_unlock(&qp->q.lock); spin_unlock(&qp->q.lock);
out_rcu_unlock: out_rcu_unlock:
rcu_read_unlock(); rcu_read_unlock();
if (head) kfree_skb(head);
kfree_skb(head);
ipq_put(qp); ipq_put(qp);
} }

6
net/ipv6/af_inet6.c
View file

@ -468,12 +468,10 @@ void inet6_destroy_sock(struct sock *sk)
/* Release rx options */ /* Release rx options */
skb = xchg(&np->pktoptions, NULL); skb = xchg(&np->pktoptions, NULL);
if (skb) kfree_skb(skb);
kfree_skb(skb);
skb = xchg(&np->rxpmtu, NULL); skb = xchg(&np->rxpmtu, NULL);
if (skb) kfree_skb(skb);
kfree_skb(skb);
/* Free flowlabels */ /* Free flowlabels */
fl6_free_socklist(sk); fl6_free_socklist(sk);

6
net/nfc/nci/uart.c
View file

@ -192,10 +192,8 @@ static void nci_uart_tty_close(struct tty_struct *tty)
if (!nu) if (!nu)
return; return;
if (nu->tx_skb) kfree_skb(nu->tx_skb);
kfree_skb(nu->tx_skb); kfree_skb(nu->rx_skb);
if (nu->rx_skb)
kfree_skb(nu->rx_skb);
skb_queue_purge(&nu->tx_q); skb_queue_purge(&nu->tx_q);