linux-kernel - [PATCH net v2] net/mlx5e: Fix NULL deref in mlx5e_tir_builder

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-next>] [day] [month] [year] [list]

Message-Id: <20240924160018.29049-1-esalomatkina@ispras.ru>
Date: Tue, 24 Sep 2024 19:00:18 +0300
From: Elena Salomatkina <esalomatkina@...ras.ru>
To: "Сc:lvc-project"@linuxtesting.org,
	Saeed Mahameed <saeedm@...dia.com>
Cc: Elena Salomatkina <esalomatkina@...ras.ru>,
	Leon Romanovsky <leon@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Maxim Mikityanskiy <maximmi@...dia.com>,
	Tariq Toukan <tariqt@...dia.com>,
	Maor Dickman <maord@...dia.com>,
	netdev@...r.kernel.org,
	linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net v2] net/mlx5e: Fix NULL deref in mlx5e_tir_builder_alloc()

In mlx5e_tir_builder_alloc() kvzalloc() may return NULL
which is dereferenced on the next line in a reference
to the modify field.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: a6696735d694 ("net/mlx5e: Convert TIR to a dedicated object")
Signed-off-by: Elena Salomatkina <esalomatkina@...ras.ru>
---
v2: Fix tab, add blank line

 drivers/net/ethernet/mellanox/mlx5/core/en/tir.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tir.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tir.c
index d4239e3b3c88..11f724ad90db 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tir.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tir.c
@@ -23,6 +23,9 @@ struct mlx5e_tir_builder *mlx5e_tir_builder_alloc(bool modify)
 	struct mlx5e_tir_builder *builder;
 
 	builder = kvzalloc(sizeof(*builder), GFP_KERNEL);
+	if (!builder)
+		return NULL;
+
 	builder->modify = modify;
 
 	return builder;
-- 
2.33.0