From: Ma Ke <make24@iscas.ac.cn>
To: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org,
decui@microsoft.com, davem@davemloft.net, edumazet@google.com,
kuba@kernel.org, pabeni@redhat.com,
shradhagupta@linux.microsoft.com, horms@kernel.org,
kotaranov@microsoft.com, schakrabarti@linux.microsoft.com,
erick.archer@outlook.com
Cc: linux-hyperv@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, Ma Ke <make24@iscas.ac.cn>
Subject: [PATCH v2] net: mana: Fix possible double free in error handling path
Date: Tue, 25 Jun 2024 16:38:16 +0800 [thread overview]
Message-ID: <20240625083816.2623936-1-make24@iscas.ac.cn> (raw)
When auxiliary_device_add() returns error and then calls
auxiliary_device_uninit(), callback function adev_release
calls kfree(madev). We shouldn't call kfree(madev) again
in the error handling path. Set 'madev' to NULL.
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
---
Changes in v2:
- streamlined the patch according suggestions;
- revised the description.
---
drivers/net/ethernet/microsoft/mana/mana_en.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index d087cf954f75..608ad31a9702 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -2798,6 +2798,8 @@ static int add_adev(struct gdma_dev *gd)
if (ret)
goto init_fail;
+ /* madev is owned by the auxiliary device */
+ madev = NULL;
ret = auxiliary_device_add(adev);
if (ret)
goto add_fail;
--
2.25.1
next reply other threads:[~2024-06-25 8:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-25 8:38 Ma Ke [this message]
2024-06-25 9:13 ` Przemek Kitszel
2024-06-25 9:38 ` Konstantin Taranov
2024-06-25 9:41 ` Konstantin Taranov
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