linux-kernel - Re: [PATCH] net: liquidio: fix NULL pointer dereferences

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: <20190311.121710.968693621648443243.davem@davemloft.net>
Date:   Mon, 11 Mar 2019 12:17:10 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     kjlu@....edu
Cc:     pakki001@....edu, dchickles@...vell.com, sburla@...vell.com,
        fmanlunas@...vell.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: liquidio: fix NULL pointer dereferences

From: Kangjie Lu <kjlu@....edu>
Date: Mon, 11 Mar 2019 00:46:15 -0500

> @@ -1960,6 +1966,12 @@ static int setup_nic_devices(struct octeon_device *octeon_dev)
>  		sc = (struct octeon_soft_command *)
>  			octeon_alloc_soft_command(octeon_dev, data_size,
>  						  resp_size, 0);
> +		if (!sc) {
> +			dev_err(&octeon_dev->pci_dev->dev,
> +				"Failed to allocate octeon_soft_command\n");
> +			return -ENOMEM;
> +		}

Again, very sloppy.  You have to branch to setup_nic_dev_free in this situation
otherwise you leak devices allocated and setup from previous iterations of the
loop this code is in.