[PATCH] net: return value of skb_linearize should be handled in Linux kernel
From: Zhouyi Zhou <hidden>
Date: 2016-12-06 07:10:54
kmalloc_reserve may fail to allocate memory inside skb_linearize, which means skb_linearize's return value should not be ignored. Following patch correct the uses of skb_linearize. Compiled in x86_64 Signed-off-by: Zhouyi Zhou <redacted> --- drivers/infiniband/hw/nes/nes_nic.c | 5 +++-- drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c | 6 +++++- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 3 +-- drivers/scsi/bnx2fc/bnx2fc_fcoe.c | 7 +++++-- drivers/scsi/fcoe/fcoe.c | 5 ++++- net/tipc/link.c | 3 ++- net/tipc/name_distr.c | 5 ++++- 7 files changed, 24 insertions(+), 10 deletions(-)
diff --git a/drivers/infiniband/hw/nes/nes_nic.c b/drivers/infiniband/hw/nes/nes_nic.c
index 2b27d13..69372ea 100644
--- a/drivers/infiniband/hw/nes/nes_nic.c
+++ b/drivers/infiniband/hw/nes/nes_nic.c@@ -662,10 +662,11 @@ static int nes_netdev_start_xmit(struct sk_buff *skb, struct net_device *netdev) nesnic->sq_head &= nesnic->sq_size-1; } } else { - nesvnic->linearized_skbs++; hoffset = skb_transport_header(skb) - skb->data; nhoffset = skb_network_header(skb) - skb->data; - skb_linearize(skb); + if (skb_linearize(skb)) + return NETDEV_TX_BUSY; + nesvnic->linearized_skbs++; skb_set_transport_header(skb, hoffset); skb_set_network_header(skb, nhoffset); if (!nes_nic_send(skb, netdev))
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
index 2a653ec..ab787cb 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c@@ -490,7 +490,11 @@ int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter, */ if ((fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA) && (fctl & FC_FC_END_SEQ)) { - skb_linearize(skb); + int err = 0; + + err = skb_linearize(skb); + if (err) + return err; crc = (struct fcoe_crc_eof *)skb_put(skb, sizeof(*crc)); crc->fcoe_eof = FC_EOF_T; }
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index fee1f29..4926d48 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c@@ -2173,8 +2173,7 @@ static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector, total_rx_bytes += ddp_bytes; total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss); - } - if (!ddp_bytes) { + } else { dev_kfree_skb_any(skb); continue; }
diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
index f9ddb61..197d02e 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c@@ -542,8 +542,11 @@ static void bnx2fc_recv_frame(struct sk_buff *skb) return; } - if (skb_is_nonlinear(skb)) - skb_linearize(skb); + if (skb_linearize(skb)) { + kfree_skb(skb); + return; + } + mac = eth_hdr(skb)->h_source; dest_mac = eth_hdr(skb)->h_dest;
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 9bd41a3..f691b97 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c@@ -1685,7 +1685,10 @@ static void fcoe_recv_frame(struct sk_buff *skb) skb->dev ? skb->dev->name : "<NULL>"); port = lport_priv(lport); - skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */ + if (skb_linearize(skb)) { + kfree_skb(skb); + return; + } /* * Frame length checks and setting up the header pointers
diff --git a/net/tipc/link.c b/net/tipc/link.c
index bda89bf..077c570 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c@@ -1446,7 +1446,8 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb, if (tipc_own_addr(l->net) > msg_prevnode(hdr)) l->net_plane = msg_net_plane(hdr); - skb_linearize(skb); + if (skb_linearize(skb)) + goto exit; hdr = buf_msg(skb); data = msg_data(hdr);
diff --git a/net/tipc/name_distr.c b/net/tipc/name_distr.c
index c1cfd92..4e05d2a 100644
--- a/net/tipc/name_distr.c
+++ b/net/tipc/name_distr.c@@ -356,7 +356,10 @@ void tipc_named_rcv(struct net *net, struct sk_buff_head *inputq) spin_lock_bh(&tn->nametbl_lock); for (skb = skb_dequeue(inputq); skb; skb = skb_dequeue(inputq)) { - skb_linearize(skb); + if (skb_linearize(skb)) { + kfree_skb(skb); + continue; + } msg = buf_msg(skb); mtype = msg_type(msg); item = (struct distr_item *)msg_data(msg);
--
1.9.1