From: Xu Wang <vulab@iscas.ac.cn>
To: wsa@the-dreams.de
Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] i2c: Fix a potential use after free
Date: Fri, 27 Dec 2019 09:34:32 +0000 [thread overview]
Message-ID: <1577439272-10362-1-git-send-email-vulab@iscas.ac.cn> (raw)
Free the adap structure only after we are done using it.
This patch just moves the put_device() down a bit to avoid the
use after free.
Signed-off-by: Xu Wang <vulab@iscas.ac.cn>
---
drivers/i2c/i2c-core-base.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 9f8dcd3..160d43e 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -2301,8 +2301,8 @@ void i2c_put_adapter(struct i2c_adapter *adap)
if (!adap)
return;
- put_device(&adap->dev);
module_put(adap->owner);
+ put_device(&adap->dev);
}
EXPORT_SYMBOL(i2c_put_adapter);
--
2.7.4
next reply other threads:[~2019-12-27 9:34 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-27 9:34 Xu Wang [this message]
2019-12-28 12:50 ` [PATCH 2/2] i2c: Fix a potential use after free Markus Elfring
2020-03-22 15:56 ` Wolfram Sang
2022-06-16 21:00 ` Wolfram Sang
2022-07-26 21:13 ` Wolfram Sang
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