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: <20230724151507.6b725396@kernel.org>
Date:   Mon, 24 Jul 2023 15:15:07 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Lin Ma <linma@....edu.cn>
Cc:     davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
        ast@...nel.org, martin.lau@...nel.org, yhs@...com,
        andrii@...nel.org, void@...ifault.com, houtao1@...wei.com,
        laoar.shao@...il.com, inwardvessel@...il.com, kuniyu@...zon.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        bpf@...r.kernel.org
Subject: Re: [PATCH v1] bpf: Add length check for
 SK_DIAG_BPF_STORAGE_REQ_MAP_FD parsing

On Sun, 23 Jul 2023 15:54:52 +0800 Lin Ma wrote:
> diff --git a/net/core/bpf_sk_storage.c b/net/core/bpf_sk_storage.c
> index d4172534dfa8..6f1afbb394a6 100644
> --- a/net/core/bpf_sk_storage.c
> +++ b/net/core/bpf_sk_storage.c
> @@ -511,6 +511,11 @@ bpf_sk_storage_diag_alloc(const struct nlattr *nla_stgs)
>  		if (nla_type(nla) != SK_DIAG_BPF_STORAGE_REQ_MAP_FD)
>  			continue;
>  
> +		if (nla_len(nla) < sizeof(map_fd)) {
> +			err = -EINVAL;
> +			goto err_free;
> +		}

You can move this check earlier, when the attributes are getting
counted. That way we can avoid the alloc/free on error.

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ