From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Lin Ma <linma@zju.edu.cn>,
Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
"David S . Miller" <davem@davemloft.net>,
Sasha Levin <sashal@kernel.org>,
kuba@kernel.org, bongsu.jeon@samsung.com, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.9 2/7] nfc: nci: fix the UAF of rf_conn_info object
Date: Wed, 20 Oct 2021 20:23:58 -0400 [thread overview]
Message-ID: <20211021002404.1129946-2-sashal@kernel.org> (raw)
In-Reply-To: <20211021002404.1129946-1-sashal@kernel.org>
From: Lin Ma <linma@zju.edu.cn>
[ Upstream commit 1b1499a817c90fd1ce9453a2c98d2a01cca0e775 ]
The nci_core_conn_close_rsp_packet() function will release the conn_info
with given conn_id. However, it needs to set the rf_conn_info to NULL to
prevent other routines like nci_rf_intf_activated_ntf_packet() to trigger
the UAF.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Lin Ma <linma@zju.edu.cn>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/nfc/nci/rsp.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/nfc/nci/rsp.c b/net/nfc/nci/rsp.c
index e3bbf1937d0e..7681f89dc312 100644
--- a/net/nfc/nci/rsp.c
+++ b/net/nfc/nci/rsp.c
@@ -289,6 +289,8 @@ static void nci_core_conn_close_rsp_packet(struct nci_dev *ndev,
ndev->cur_conn_id);
if (conn_info) {
list_del(&conn_info->list);
+ if (conn_info == ndev->rf_conn_info)
+ ndev->rf_conn_info = NULL;
devm_kfree(&ndev->nfc_dev->dev, conn_info);
}
}
--
2.33.0
next prev parent reply other threads:[~2021-10-21 0:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-21 0:23 [PATCH AUTOSEL 4.9 1/7] ARM: dts: spear3xx: Fix gmac node Sasha Levin
2021-10-21 0:23 ` Sasha Levin [this message]
2021-10-21 0:23 ` [PATCH AUTOSEL 4.9 3/7] isdn: cpai: check ctr->cnr to avoid array index out of bound Sasha Levin
2021-10-21 0:24 ` [PATCH AUTOSEL 4.9 4/7] isdn: mISDN: Fix sleeping function called from invalid context Sasha Levin
2021-10-21 0:24 ` [PATCH AUTOSEL 4.9 5/7] platform/x86: intel_scu_ipc: Update timeout value in comment Sasha Levin
2021-10-21 0:24 ` [PATCH AUTOSEL 4.9 6/7] ALSA: hda: avoid write to STATESTS if controller is in reset Sasha Levin
2021-10-21 0:24 ` [PATCH AUTOSEL 4.9 7/7] Input: xpad - add support for another USB ID of Nacon GC-100 Sasha Levin
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