diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2017-12-07 11:15:19 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-25 11:08:03 +0100 |
| commit | 473900cd523a9d11a03a2eb5fec2e2ef029fb21b (patch) | |
| tree | bdc00b43ec510ee1dcae906431328ce76377f16a /drivers/pci/host | |
| parent | 73974676f802f6634054539757dd66fee0754190 (diff) | |
PCI: rcar: Fix use-after-free in probe error path
[ Upstream commit 0c31f1d7be1b5c4858b1d714dcefa25f41428cab ]
If CONFIG_DEBUG_SLAB=y, and no PCIe card is inserted, the kernel crashes
during probe on r8a7791/koelsch:
rcar-pcie fe000000.pcie: PCIe link down
Unable to handle kernel paging request at virtual address 6b6b6b6b
(seeing this message requires earlycon and keep_bootcon).
Indeed, pci_free_host_bridge() frees the PCI host bridge, including the
embedded rcar_pcie object, so pci_free_resource_list() must not be called
afterwards.
To fix this, move the call to pci_free_resource_list() up, and update the
label name accordingly.
Fixes: ddd535f1ea3eb27e ("PCI: rcar: Fix memory leak when no PCIe card is inserted")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pci/host')
| -rw-r--r-- | drivers/pci/host/pcie-rcar.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c index 4e0b25d09b0c..f09ff4789bb5 100644 --- a/drivers/pci/host/pcie-rcar.c +++ b/drivers/pci/host/pcie-rcar.c @@ -1146,12 +1146,12 @@ static int rcar_pcie_probe(struct platform_device *pdev) err = rcar_pcie_get_resources(pcie); if (err < 0) { dev_err(dev, "failed to request resources: %d\n", err); - goto err_free_bridge; + goto err_free_resource_list; } err = rcar_pcie_parse_map_dma_ranges(pcie, dev->of_node); if (err) - goto err_free_bridge; + goto err_free_resource_list; pm_runtime_enable(dev); err = pm_runtime_get_sync(dev); @@ -1194,9 +1194,9 @@ err_pm_put: err_pm_disable: pm_runtime_disable(dev); -err_free_bridge: - pci_free_host_bridge(bridge); +err_free_resource_list: pci_free_resource_list(&pcie->resources); + pci_free_host_bridge(bridge); return err; } |