From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7D530633 for ; Wed, 2 Nov 2022 03:44:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A198C433C1; Wed, 2 Nov 2022 03:44:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1667360681; bh=1EBnthBD3u/GquVJZSWcraO2LYmCiBxFoa3WCz7y5s0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zxPZb/G8R6Oatvg0fYRFidiagHivOefKBcwG+6dDD2OrPMI0bdWQwrSN3LWQ6UBNJ A3viFGppMqf/AmKFijKz8Z6yUtyRMFoGC6SQXJyftZRu4FNcoveUKICYNOX1SHlSeA 5HF1KdDy3EgmQMRqMxhmOJTD54GXYzyAN8aK1IYk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Matthew Ma , Weizhao Ouyang , John Wang , Ulf Hansson Subject: [PATCH 4.9 19/44] mmc: core: Fix kernel panic when remove non-standard SDIO card Date: Wed, 2 Nov 2022 03:35:05 +0100 Message-Id: <20221102022049.723437460@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221102022049.017479464@linuxfoundation.org> References: <20221102022049.017479464@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Matthew Ma 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 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 Signed-off-by: Greg Kroah-Hartman --- 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 @@ -263,7 +263,8 @@ 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);