From: Yang Yingliang yangyingliang@huawei.com
[ Upstream commit 0ca18d09c744fb030ae9bc5836c3e357e0237dea ]
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: 1b66e94e6b99 ("mmc: moxart: Add MOXA ART SD/MMC driver") Signed-off-by: Yang Yingliang yangyingliang@huawei.com Link: https://lore.kernel.org/r/20221101063023.1664968-3-yangyingliang@huawei.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mmc/host/moxart-mmc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/moxart-mmc.c b/drivers/mmc/host/moxart-mmc.c index 1552d1f09c5c..52307dce08ba 100644 --- a/drivers/mmc/host/moxart-mmc.c +++ b/drivers/mmc/host/moxart-mmc.c @@ -660,7 +660,9 @@ static int moxart_probe(struct platform_device *pdev) goto out;
dev_set_drvdata(dev, mmc); - mmc_add_host(mmc); + ret = mmc_add_host(mmc); + if (ret) + goto out;
dev_dbg(dev, "IRQ=%d, FIFO is %d bytes\n", irq, host->fifo_width);