From: Peter Kosyh pkosyh@yandex.ru
[ Upstream commit 594c61ffc77de0a197934aa0f1df9285c68801c6 ]
If mlx4_bitmap_init fails, mlx4_bitmap_alloc_range will dereference the NULL pointer (bitmap->table).
Make sure, that mlx4_bitmap_alloc_range called in no error case.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: d57febe1a478 ("net/mlx4: Add A0 hybrid steering") Reviewed-by: Tariq Toukan tariqt@nvidia.com Signed-off-by: Peter Kosyh pkosyh@yandex.ru Link: https://lore.kernel.org/r/20221117152806.278072-1-pkosyh@yandex.ru Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/mellanox/mlx4/qp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/qp.c b/drivers/net/ethernet/mellanox/mlx4/qp.c index 73419224367a..6fbc19b143f8 100644 --- a/drivers/net/ethernet/mellanox/mlx4/qp.c +++ b/drivers/net/ethernet/mellanox/mlx4/qp.c @@ -697,7 +697,8 @@ static int mlx4_create_zones(struct mlx4_dev *dev, err = mlx4_bitmap_init(*bitmap + k, 1, MLX4_QP_TABLE_RAW_ETH_SIZE - 1, 0, 0); - mlx4_bitmap_alloc_range(*bitmap + k, 1, 1, 0); + if (!err) + mlx4_bitmap_alloc_range(*bitmap + k, 1, 1, 0); }
if (err)