| 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
| ||
|
Date: Wed, 21 Mar 2012 09:20:00 -0700
From: Roland Dreier <roland@...estorage.com>
To: parav.pandit@...lex.com
Cc: linux-rdma@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 2/9] ocrdma: Driver for Emulex OneConnect RDMA adapter
On Tue, Mar 20, 2012 at 3:39 PM, <parav.pandit@...lex.com> wrote:
> From: Parav Pandit <parav.pandit@...lex.com>
>
> - Header file for userspace library and kernel driver interface.
> +struct ocrdma_alloc_ucontext_resp {
> + u32 dev_id;
> + u32 wqe_size;
> + u32 max_inline_data;
> + u32 dpp_wqe_size;
> + u64 ah_tbl_page;
> + u32 ah_tbl_len;
> + u32 rsvd;
> + u8 fw_ver[32];
> + u32 rqe_size;
> + u64 rsvd1;
> +} __packed;
If I'm reading this correctly, you have the 8-byte rsvd1 member at an
offset only aligned to 4 bytes, because of the __packed directive. It
would be much better to have these structures laid out so they are
naturally the same on both 32-bit and 64-bit ABIs, and get rid of the
__packed directive, which wrecks gcc code generation in some cases.
In this particular case, it seems you could just move rqe_size into the
slot where rsvd is, and get rid of rsvd1?
> +/* user kernel communication data structures. */
> +struct ocrdma_alloc_pd_ureq {
> + u64 rsvd1;
> +} __packed;
Similar comment -- __packed is silly for a structure with one reserved
member (and which you don't seem to use anywhere)... why not just
delete this struct?
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists