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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2016-01-02 02:12:38 +0300
committerKalle Valo <kvalo@codeaurora.org>2016-01-07 11:18:50 +0200
commitf7b7caa488eb209f1c63cc98104407c62753e406 (patch)
tree9cc144d30464f1b37619a2f115936b2577334a9c
parentee548d4b1036aaba290a4eec68ba11590ad9cc73 (diff)
ipw2x00: add checks for dma mapping errors
ipw2100_alloc_skb() and ipw2100_tx_send_data() do not check if mapping dma memory succeed. The patch adds the checks and failure handling. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
-rw-r--r--drivers/net/wireless/intel/ipw2x00/ipw2100.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/net/wireless/intel/ipw2x00/ipw2100.c b/drivers/net/wireless/intel/ipw2x00/ipw2100.c
index 36818c7..f93a7f7 100644
--- a/drivers/net/wireless/intel/ipw2x00/ipw2100.c
+++ b/drivers/net/wireless/intel/ipw2x00/ipw2100.c
@@ -2311,8 +2311,10 @@ static int ipw2100_alloc_skb(struct ipw2100_priv *priv,
packet->dma_addr = pci_map_single(priv->pci_dev, packet->skb->data,
sizeof(struct ipw2100_rx),
PCI_DMA_FROMDEVICE);
- /* NOTE: pci_map_single does not return an error code, and 0 is a valid
- * dma_addr */
+ if (pci_dma_mapping_error(priv->pci_dev, packet->dma_addr)) {
+ dev_kfree_skb(packet->skb);
+ return -ENOMEM;
+ }
return 0;
}
@@ -3183,6 +3185,11 @@ static void ipw2100_tx_send_data(struct ipw2100_priv *priv)
LIBIPW_3ADDR_LEN,
tbd->buf_length,
PCI_DMA_TODEVICE);
+ if (pci_dma_mapping_error(priv->pci_dev,
+ tbd->host_addr)) {
+ IPW_DEBUG_TX("dma mapping error\n");
+ break;
+ }
IPW_DEBUG_TX("data frag tbd TX%d P=%08x L=%d\n",
txq->next, tbd->host_addr,