6.6-stable review patch. If anyone has any objections, please let me know.
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From: Henry Martin bsdhenrymartin@gmail.com
[ 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 --- drivers/dma/ti/k3-udma.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c index 418e1774af1e5..d99cf81358c54 100644 --- a/drivers/dma/ti/k3-udma.c +++ b/drivers/dma/ti/k3-udma.c @@ -5537,7 +5537,8 @@ 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);