This is a note to let you know that I've just added the patch titled mmc: toshsd: fix return value check of mmc_add_host() to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mmc-toshsd-fix-return-value-check-of-mmc_add_host.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 9b96ab023616c0e7bdf14be36ceeed8c3c406c28 Author: Yang Yingliang <yangyingliang@xxxxxxxxxx> Date: Tue Nov 1 14:30:21 2022 +0800 mmc: toshsd: fix return value check of mmc_add_host() [ Upstream commit f670744a316ea983113a65313dcd387b5a992444 ] mmc_add_host() may return error, if we ignore its return value, the memory that allocated in mmc_alloc_host() will be leaked and it will lead a kernel crash because of deleting not added device in the remove path. So fix this by checking the return value and goto error path which will call mmc_free_host(), besides, free_irq() also needs be called. Fixes: a5eb8bbd66cc ("mmc: add Toshiba PCI SD controller driver") Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx> Link: https://lore.kernel.org/r/20221101063023.1664968-8-yangyingliang@xxxxxxxxxx Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/mmc/host/toshsd.c b/drivers/mmc/host/toshsd.c index 553ef41bb806..c0d3b289d8d4 100644 --- a/drivers/mmc/host/toshsd.c +++ b/drivers/mmc/host/toshsd.c @@ -655,7 +655,9 @@ static int toshsd_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (ret) goto unmap; - mmc_add_host(mmc); + ret = mmc_add_host(mmc); + if (ret) + goto free_irq; base = pci_resource_start(pdev, 0); dev_dbg(&pdev->dev, "MMIO %pa, IRQ %d\n", &base, pdev->irq); @@ -664,6 +666,8 @@ static int toshsd_probe(struct pci_dev *pdev, const struct pci_device_id *ent) return 0; +free_irq: + free_irq(pdev->irq, host); unmap: pci_iounmap(pdev, host->ioaddr); release: