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| author | Wen Yang <wen.yang99@zte.com.cn> | 2019-07-06 11:38:41 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-07-08 16:28:32 -0700 |
| commit | ef86ea982bb5a31cda1f2989b6e477bb53a1031b (patch) | |
| tree | d5f7625307831f065207c8fd558fcb6bc2219418 /drivers/net/ethernet/xilinx | |
| parent | d4117d63a30876a3654f587c3a419db63d8b529d (diff) | |
| download | linux-ef86ea982bb5a31cda1f2989b6e477bb53a1031b.tar.gz linux-ef86ea982bb5a31cda1f2989b6e477bb53a1031b.tar.bz2 linux-ef86ea982bb5a31cda1f2989b6e477bb53a1031b.zip | |
net: axienet: fix a potential double free in axienet_probe()
There is a possible use-after-free issue in the axienet_probe():
1701: np = of_parse_phandle(pdev->dev.of_node, "axistream-connected", 0);
1702: if (np) {
...
1787: of_node_put(np); ---> released here
1788: lp->eth_irq = platform_get_irq(pdev, 0);
1789: } else {
...
1801: }
1802: if (IS_ERR(lp->dma_regs)) {
...
1805: of_node_put(np); ---> double released here
1806: goto free_netdev;
1807: }
We solve this problem by removing the unnecessary of_node_put().
Fixes: 28ef9ebdb64c ("net: axienet: make use of axistream-connected attribute optional")
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: Anirudha Sarangi <anirudh@xilinx.com>
Cc: John Linn <John.Linn@xilinx.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Robert Hancock <hancock@sedsystems.ca>
Cc: netdev@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Robert Hancock <hancock@sedsystems.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/xilinx')
| -rw-r--r-- | drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c index 561e28a5df04..4fc627fb4d11 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c @@ -1802,7 +1802,6 @@ static int axienet_probe(struct platform_device *pdev) if (IS_ERR(lp->dma_regs)) { dev_err(&pdev->dev, "could not map DMA regs\n"); ret = PTR_ERR(lp->dma_regs); - of_node_put(np); goto free_netdev; } if ((lp->rx_irq <= 0) || (lp->tx_irq <= 0)) { |