From: Hongwei Ma <mahongwei_123@xxxxxxx>
tuple is only allcated for standard SDIO card, especially it causes memory
corruption issue when the non-standard SDIO card has removed since the card
device's reference counter does not increase for it at sdio_init_func, but
all SDIO card device reference counter has decreased at sdio_release_func.
Cc: <stable@xxxxxxxxxxxxxxx> #v5.4+
Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxx>
---
drivers/mmc/core/sdio_bus.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index 3d709029e07c..50279f805a53 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -292,7 +292,8 @@ static void sdio_release_func(struct device *dev)
{
struct sdio_func *func = dev_to_sdio_func(dev);
- sdio_free_func_cis(func);
+ if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO))
+ sdio_free_func_cis(func);
kfree(func->info);
kfree(func->tmpbuf);
--
2.17.1
