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mmc: toshsd: fix return value check of mmc_add_host() 

[ Upstream commit f670744a31 ]

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: a5eb8bbd66 ("mmc: add Toshiba PCI SD controller driver")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221101063023.1664968-8-yangyingliang@huawei.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Yingliang 2022-11-01 14:30:21 +08:00 committed by Greg Kroah-Hartman
parent a522e26a20
commit bfd77b194c
1 changed files with 5 additions and 1 deletions
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6
drivers/mmc/host/toshsd.c
View File

@ -651,7 +651,9 @@ 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);
@ -660,6 +662,8 @@ 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: