From: Yang Yingliang yangyingliang@huawei.com
[ Upstream commit e93d1468f429475a753d6baa79b853b7ee5ef8c0 ]
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 calling mmc_free_host() in the error path.
Fixes: c5413ad815a6 ("mmc: add new Alcor Micro Cardreader SD/MMC driver") Signed-off-by: Yang Yingliang yangyingliang@huawei.com Link: https://lore.kernel.org/r/20221101063023.1664968-2-yangyingliang@huawei.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mmc/host/alcor.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/alcor.c b/drivers/mmc/host/alcor.c index 026ca9194ce5..a8ec2e6fefa8 100644 --- a/drivers/mmc/host/alcor.c +++ b/drivers/mmc/host/alcor.c @@ -1114,7 +1114,10 @@ static int alcor_pci_sdmmc_drv_probe(struct platform_device *pdev) alcor_hw_init(host);
dev_set_drvdata(&pdev->dev, host); - mmc_add_host(mmc); + ret = mmc_add_host(mmc); + if (ret) + goto free_host; + return 0;
free_host: