From: Yang Yingliang Date: Tue, 1 Nov 2022 06:30:16 +0000 (+0800) Subject: mmc: moxart: fix return value check of mmc_add_host() X-Git-Tag: v4.9.337~170 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a4c765f5d8e58138cff69f1510b2e8942ec37022;p=thirdparty%2Fkernel%2Fstable.git mmc: moxart: fix return value check of mmc_add_host() [ 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 Link: https://lore.kernel.org/r/20221101063023.1664968-3-yangyingliang@huawei.com Signed-off-by: Ulf Hansson Signed-off-by: Sasha Levin --- diff --git a/drivers/mmc/host/moxart-mmc.c b/drivers/mmc/host/moxart-mmc.c index 4f8588c3bf537..48645b736ba50 100644 --- a/drivers/mmc/host/moxart-mmc.c +++ b/drivers/mmc/host/moxart-mmc.c @@ -662,7 +662,9 @@ 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);