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| author | Matthew Ma <mahongwei@zeku.com> | 2022-10-14 11:49:51 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2022-10-17 11:51:34 +0200 |
| commit | 9972e6b404884adae9eec7463e30d9b3c9a70b18 (patch) | |
| tree | 6253fed96b23b2461ce787e44051de217b049249 /drivers/mmc/core | |
| parent | 9dc0033e4658d6f9d9952c3c0c6be3ec25bc2985 (diff) | |
| download | linux-stable-9972e6b404884adae9eec7463e30d9b3c9a70b18.tar.gz linux-stable-9972e6b404884adae9eec7463e30d9b3c9a70b18.tar.bz2 linux-stable-9972e6b404884adae9eec7463e30d9b3c9a70b18.zip | |
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 <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>
Diffstat (limited to 'drivers/mmc/core')
| -rw-r--r-- | drivers/mmc/core/sdio_bus.c | 3 |
1 files changed, 2 insertions, 1 deletions
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); |