From: Matthew Ma mahongwei@zeku.com
commit 9972e6b404884adae9eec7463e30d9b3c9a70b18 upstream.
SDIO tuple is only allocated for standard SDIO card, especially it causes memory corruption issues when the non-standard SDIO card has removed, which is because the card device's reference counter does not increase for it at sdio_init_func(), but all SDIO card device reference counter gets decreased at sdio_release_func().
Fixes: 6f51be3d37df ("sdio: allow non-standard SDIO cards") Signed-off-by: Matthew Ma mahongwei@zeku.com Reviewed-by: Weizhao Ouyang ouyangweizhao@zeku.com Reviewed-by: John Wang wangdayu@zeku.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20221014034951.2300386-1-ouyangweizhao@zeku.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mmc/core/sdio_bus.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/mmc/core/sdio_bus.c +++ b/drivers/mmc/core/sdio_bus.c @@ -264,7 +264,8 @@ static void sdio_release_func(struct dev { struct sdio_func *func = dev_to_sdio_func(dev);
- sdio_free_func_cis(func); + if (!(func->card->quirks & MMC_QUIRK_NONSTD_SDIO)) + sdio_free_func_cis(func);
kfree(func->info); kfree(func->tmpbuf);