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From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Samuel Ortiz <sameo@linux.intel.com>,
	linux-nfc@lists.01.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Cc: tadeusz.struk@linaro.org, stable@vger.kernel.org
Subject: [PATCH] nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done
Date: Thu,  9 Dec 2021 09:13:07 +0100	[thread overview]
Message-ID: <20211209081307.57337-1-krzysztof.kozlowski@canonical.com> (raw)

The done() netlink callback nfc_genl_dump_ses_done() should check if
received argument is non-NULL, because its allocation could fail earlier
in dumpit() (nfc_genl_dump_ses()).

Fixes: ac22ac466a65 ("NFC: Add a GET_SE netlink API")
Cc: <stable@vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
---
 net/nfc/netlink.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 334f63c9529e..5c706ed75b33 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -1392,8 +1392,10 @@ static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
 {
 	struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
 
-	nfc_device_iter_exit(iter);
-	kfree(iter);
+	if (iter) {
+		nfc_device_iter_exit(iter);
+		kfree(iter);
+	}
 
 	return 0;
 }
-- 
2.32.0


WARNING: multiple messages have this Message-ID (diff)
From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Samuel Ortiz <sameo@linux.intel.com>,
	linux-nfc@lists.01.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Cc: tadeusz.struk@linaro.org, stable@vger.kernel.org
Subject: [linux-nfc] [PATCH] nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done
Date: Thu,  9 Dec 2021 09:13:07 +0100	[thread overview]
Message-ID: <20211209081307.57337-1-krzysztof.kozlowski@canonical.com> (raw)

The done() netlink callback nfc_genl_dump_ses_done() should check if
received argument is non-NULL, because its allocation could fail earlier
in dumpit() (nfc_genl_dump_ses()).

Fixes: ac22ac466a65 ("NFC: Add a GET_SE netlink API")
Cc: <stable@vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
---
 net/nfc/netlink.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 334f63c9529e..5c706ed75b33 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -1392,8 +1392,10 @@ static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
 {
 	struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
 
-	nfc_device_iter_exit(iter);
-	kfree(iter);
+	if (iter) {
+		nfc_device_iter_exit(iter);
+		kfree(iter);
+	}
 
 	return 0;
 }
-- 
2.32.0
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WARNING: multiple messages have this Message-ID (diff)
From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
To: linux-nfc@lists.01.org
Subject: [PATCH] nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done
Date: Thu, 09 Dec 2021 09:13:07 +0100	[thread overview]
Message-ID: <20211209081307.57337-1-krzysztof.kozlowski@canonical.com> (raw)

[-- Attachment #1: Type: text/plain, Size: 885 bytes --]

The done() netlink callback nfc_genl_dump_ses_done() should check if
received argument is non-NULL, because its allocation could fail earlier
in dumpit() (nfc_genl_dump_ses()).

Fixes: ac22ac466a65 ("NFC: Add a GET_SE netlink API")
Cc: <stable@vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
---
 net/nfc/netlink.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 334f63c9529e..5c706ed75b33 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -1392,8 +1392,10 @@ static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
 {
 	struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
 
-	nfc_device_iter_exit(iter);
-	kfree(iter);
+	if (iter) {
+		nfc_device_iter_exit(iter);
+		kfree(iter);
+	}
 
 	return 0;
 }
-- 
2.32.0

             reply	other threads:[~2021-12-09  8:13 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-09  8:13 Krzysztof Kozlowski [this message]
2021-12-09  8:13 ` [PATCH] nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done Krzysztof Kozlowski
2021-12-09  8:13 ` [linux-nfc] " Krzysztof Kozlowski
2021-12-09 16:00 ` patchwork-bot+netdevbpf

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