This is a note to let you know that I've just added the patch titled
mmc: core: Fix kernel panic when remove non-standard SDIO card
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mmc-core-fix-kernel-panic-when-remove-non-standard-sdio-card.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9972e6b404884adae9eec7463e30d9b3c9a70b18 Mon Sep 17 00:00:00 2001
From: Matthew Ma <mahongwei@xxxxxxxx>
Date: Fri, 14 Oct 2022 11:49:51 +0800
Subject: mmc: core: Fix kernel panic when remove non-standard SDIO card
From: Matthew Ma <mahongwei@xxxxxxxx>
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@xxxxxxxx>
Reviewed-by: Weizhao Ouyang <ouyangweizhao@xxxxxxxx>
Reviewed-by: John Wang <wangdayu@xxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20221014034951.2300386-1-ouyangweizhao@xxxxxxxx
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -290,7 +290,8 @@ 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);
Patches currently in stable-queue which might be from mahongwei@xxxxxxxx are
queue-5.15/mmc-core-fix-kernel-panic-when-remove-non-standard-sdio-card.patch
