diff options
| author | Koichiro Den <den@valinux.co.jp> | 2026-05-21 17:21:51 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2026-06-08 14:32:21 +0300 |
| commit | 11d7cfe0c119691b2dafbb699bbca90258c678aa (patch) | |
| tree | 9c9c53f9c85bd7cfaaead80f543ac5ad68b89952 | |
| parent | c0a207898fca8cbb4fad0da1e950d477b6afbf64 (diff) | |
| download | linux-11d7cfe0c119691b2dafbb699bbca90258c678aa.tar.xz | |
dmaengine: dw-edma-pcie: Reject devices without driver data
dw_edma_pcie_probe() treats the PCI device ID driver_data as the
template for the controller layout and copies it unconditionally. A
device bound dynamically via sysfs can match the driver without that
data, which leads to a NULL pointer dereference.
Reject such matches before enabling the device.
Fixes: 41aaff2a2ac0 ("dmaengine: Add Synopsys eDMA IP PCIe glue-logic")
Cc: stable@vger.kernel.org
Signed-off-by: Koichiro Den <den@valinux.co.jp>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260521142153.2957432-3-den@valinux.co.jp
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/dma/dw-edma/dw-edma-pcie.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c index 2082d0021a8d..791c46e8ae4c 100644 --- a/drivers/dma/dw-edma/dw-edma-pcie.c +++ b/drivers/dma/dw-edma/dw-edma-pcie.c @@ -328,6 +328,9 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev, int i, mask; bool non_ll = false; + if (!pdata) + return -ENODEV; + struct dw_edma_pcie_data *vsec_data __free(kfree) = kmalloc_obj(*vsec_data); if (!vsec_data) |