From: Qinglang Miao <miaoqinglang@huawei.com>
To: Maxim Levitsky <maximlevitsky@gmail.com>,
Alex Dubov <oakad@yahoo.com>,
Ulf Hansson <ulf.hansson@linaro.org>
Cc: <linux-mmc@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
Qinglang Miao <miaoqinglang@huawei.com>
Subject: [PATCH] memstick: fix a double-free bug in memstick_check
Date: Fri, 20 Nov 2020 15:48:46 +0800 [thread overview]
Message-ID: <20201120074846.31322-1-miaoqinglang@huawei.com> (raw)
kfree(host->card) has been called in put_device so that
another kfree would raise cause a double-free bug.
Fixes: 0193383a5833 ("memstick: core: fix device_register() error handling")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
---
drivers/memstick/core/memstick.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/memstick/core/memstick.c b/drivers/memstick/core/memstick.c
index ef03d6faf..12bc3f5a6 100644
--- a/drivers/memstick/core/memstick.c
+++ b/drivers/memstick/core/memstick.c
@@ -468,7 +468,6 @@ static void memstick_check(struct work_struct *work)
host->card = card;
if (device_register(&card->dev)) {
put_device(&card->dev);
- kfree(host->card);
host->card = NULL;
}
} else
--
2.23.0
next reply other threads:[~2020-11-20 7:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-20 7:48 Qinglang Miao [this message]
2020-11-23 16:07 ` [PATCH] memstick: fix a double-free bug in memstick_check Ulf Hansson
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