This is a note to let you know that I've just added the patch titled
mmc: omap_hsmmc: fix return value check of mmc_add_host()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mmc-omap_hsmmc-fix-return-value-check-of-mmc_add_hos.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit abdd8f24b4fabafd731bdbb7eeb4d9a5c8da9221
Author: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Date: Tue Nov 8 20:13:16 2022 +0800
mmc: omap_hsmmc: fix return value check of mmc_add_host()
[ Upstream commit a525cad241c339ca00bf7ebf03c5180f2a9b767c ]
mmc_add_host() may return error, if we ignore its return value,
it will lead two issues:
1. The memory that allocated in mmc_alloc_host() is leaked.
2. In the remove() path, mmc_remove_host() will be called to
delete device, but it's not added yet, it will lead a kernel
crash because of null-ptr-deref in device_del().
Fix this by checking the return value and goto error path wihch
will call mmc_free_host().
Fixes: a45c6cb81647 ("[ARM] 5369/1: omap mmc: Add new omap hsmmc controller for 2430 and 34xx, v3")
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221108121316.340354-1-yangyingliang@xxxxxxxxxx
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index d0df054b0b47..ee9edf817a32 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1998,7 +1998,9 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
if (!ret)
mmc->caps |= MMC_CAP_SDIO_IRQ;
- mmc_add_host(mmc);
+ ret = mmc_add_host(mmc);
+ if (ret)
+ goto err_irq;
if (mmc_pdata(host)->name != NULL) {
ret = device_create_file(&mmc->class_dev, &dev_attr_slot_name);
