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mmc: core: Fix kernel panic when remove non-standard SDIO card

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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>
This commit is contained in:
Matthew Ma 2022-10-14 11:49:51 +08:00 committed by Ulf Hansson
parent 9dc0033e46
commit 9972e6b404
1 changed files with 2 additions and 1 deletions
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1
drivers/mmc/core/sdio_bus.c
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@ -291,6 +291,7 @@ static void sdio_release_func(struct device *dev)
{
struct sdio_func *func = dev_to_sdio_func(dev);
if (!(func->card->quirks & MMC_QUIRK_NONSTD_SDIO))
sdio_free_func_cis(func);
kfree(func->info);