linux-kernel - [PATCH 5.1 334/405] thunderbolt: property: Fix a NULL pointer dereference

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20190530030557.612661571@linuxfoundation.org>
Date:   Wed, 29 May 2019 20:05:32 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Kangjie Lu <kjlu@....edu>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.1 334/405] thunderbolt: property: Fix a NULL pointer dereference

[ Upstream commit 106204b56f60abf1bead7dceb88f2be3e34433da ]

In case kzalloc fails, the fix releases resources and returns
-ENOMEM to avoid the NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@....edu>
Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/thunderbolt/property.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/thunderbolt/property.c b/drivers/thunderbolt/property.c
index ead18c532b53d..8c077c4f3b5b2 100644
--- a/drivers/thunderbolt/property.c
+++ b/drivers/thunderbolt/property.c
@@ -548,6 +548,11 @@ int tb_property_add_data(struct tb_property_dir *parent, const char *key,
 
 	property->length = size / 4;
 	property->value.data = kzalloc(size, GFP_KERNEL);
+	if (!property->value.data) {
+		kfree(property);
+		return -ENOMEM;
+	}
+
 	memcpy(property->value.data, buf, buflen);
 
 	list_add_tail(&property->list, &parent->properties);
-- 
2.20.1