From: Yang Yingliang yangyingliang@huawei.com
[ Upstream commit cde600af7b413c9fe03e85c58c4279df90e91d13 ]
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().
Fixes: d96be879ff46 ("mmc: Add a MX2/MX3 specific SDHC driver") Signed-off-by: Yang Yingliang yangyingliang@huawei.com Link: https://lore.kernel.org/r/20221101063023.1664968-4-yangyingliang@huawei.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mmc/host/mxcmmc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c index fb3ca8296273..2c57cccb0fa1 100644 --- a/drivers/mmc/host/mxcmmc.c +++ b/drivers/mmc/host/mxcmmc.c @@ -1159,7 +1159,9 @@ static int mxcmci_probe(struct platform_device *pdev) host->watchdog.function = &mxcmci_watchdog; host->watchdog.data = (unsigned long)mmc;
- mmc_add_host(mmc); + ret = mmc_add_host(mmc); + if (ret) + goto out_free_dma;
return 0;