From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yuval Shaia Subject: Re: [PATCH] net/mlx5/core/fpga/ipsec: Fix use-after-free Date: Thu, 22 Mar 2018 20:32:26 +0200 Message-ID: <20180322183225.GA24009@yuvallap> References: <20180322180342.GA18505@embeddedgus> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Ilan Tayari , Boris Pismenny , Saeed Mahameed , Matan Barak , Leon Romanovsky , netdev@vger.kernel.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org To: "Gustavo A. R. Silva" Return-path: Content-Disposition: inline In-Reply-To: <20180322180342.GA18505@embeddedgus> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Thu, Mar 22, 2018 at 01:03:42PM -0500, Gustavo A. R. Silva wrote: > _rule_ is being freed and then dereferenced by accessing rule->ctx > > Fix this by copying the value returned by PTR_ERR(rule->ctx) into a local > variable for its safe use after freeing _rule_ > > Addresses-Coverity-ID: 1466041 ("Read from pointer after free") > Fixes: 05564d0ae075 ("net/mlx5: Add flow-steering commands for FPGA IPSec implementation") > Signed-off-by: Gustavo A. R. Silva Prefix should not be that long, a short one as this is enough. net/mlx5: Fix use-after-free Besides that - lgtm. Reviewed-by: Yuval Shaia > --- > drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c b/drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c > index 4f15685..0f5da49 100644 > --- a/drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c > +++ b/drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c > @@ -1061,8 +1061,9 @@ static int fpga_ipsec_fs_create_fte(struct mlx5_core_dev *dev, > > rule->ctx = mlx5_fpga_ipsec_fs_create_sa_ctx(dev, fte, is_egress); > if (IS_ERR(rule->ctx)) { > + int err = PTR_ERR(rule->ctx); > kfree(rule); > - return PTR_ERR(rule->ctx); > + return err; > } > > rule->fte = fte; > -- > 2.7.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html