dmaengine: ti: Add NULL check in udma_probe()

[ Upstream commit fd447415e74bccd7362f760d4ea727f8e1ebfe91 ]

devm_kasprintf() returns NULL when memory allocation fails. Currently,
udma_probe() does not check for this case, which results in a NULL
pointer dereference.

Add NULL check after devm_kasprintf() to prevent this issue.

Fixes: 25dcb5dd7b7c ("dmaengine: ti: New driver for K3 UDMA")
Signed-off-by: Henry Martin <bsdhenrymartin@gmail.com>
Reviewed-by: Nathan Lynch <nathan.lynch@amd.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://lore.kernel.org/r/20250402023900.43440-1-bsdhenrymartin@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 1ca552a324778b30a9637183654f8adaa0193666..ce5875a00f28dbe1de6206209580444c91c830b2 100644 (file)
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -5425,7 +5425,8 @@ static int udma_probe(struct platform_device *pdev)
                uc->config.dir = DMA_MEM_TO_MEM;
                uc->name = devm_kasprintf(dev, GFP_KERNEL, "%s chan%d",
                                          dev_name(dev), i);
-
+               if (!uc->name)
+                       return -ENOMEM;
                vchan_init(&uc->vc, &ud->ddev);
                /* Use custom vchan completion handling */
                tasklet_setup(&uc->vc.task, udma_vchan_complete);