From: Elena Salomatkina <esalomatkina@ispras.ru> stable inclusion from stable-v6.6.55 commit 0168ab6fbd9e50d20b97486168b604b2ab28a2ca category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAYRB1 CVE: CVE-2024-50000 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit f25389e779500cf4a59ef9804534237841bce536 ] 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@ispras.ru> Reviewed-by: Simon Horman <horms@kernel.org> Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com> Reviewed-by: Tariq Toukan <tariqt@nvidia.com> Reviewed-by: Gal Pressman <gal@nvidia.com> Signed-off-by: Saeed Mahameed <saeedm@nvidia.com> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Li Huafei <lihuafei1@huawei.com> --- 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; -- 2.25.1