From 9972e6b404884adae9eec7463e30d9b3c9a70b18 Mon Sep 17 00:00:00 2001 From: Matthew Ma Date: Fri, 14 Oct 2022 11:49:51 +0800 Subject: [PATCH] mmc: core: Fix kernel panic when remove non-standard SDIO card 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 Reviewed-by: Weizhao Ouyang Reviewed-by: John Wang Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20221014034951.2300386-1-ouyangweizhao@zeku.com Signed-off-by: Ulf Hansson --- 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 c6268c38c69e..babf21a0adeb 100644 --- a/drivers/mmc/core/sdio_bus.c +++ b/drivers/mmc/core/sdio_bus.c @@ -291,7 +291,8 @@ static void sdio_release_func(struct device *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);