linux-kernel - Re: [PATCH 1/1] drivers: brcmaxi: provide amba axi functionality in separate module

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]

Date:	Tue, 29 Mar 2011 12:45:42 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	Arend van Spriel <arend@...adcom.com>
CC:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	rmk+kernel@....linux.org.uk, devel@...uxdriverproject.org,
	gregkh@...e.de, linux-wireless@...r.kernel.org,
	Jiri Slaby <jirislaby@...il.com>
Subject: Re: [PATCH 1/1] drivers: brcmaxi: provide amba axi functionality
 in separate module

On 03/29/2011 11:40 AM, Arend van Spriel wrote:
> --- /dev/null
> +++ b/drivers/brcmaxi/axi.c
> @@ -0,0 +1,786 @@
...
> +/* resetctrl */
> +#define	AIRC_RESET		1
> +
> +/* definition for specifying padding fields */
> +#define	_PADLINE(line)	pad ## line
> +#define	_XSTR(line)	_PADLINE(line)
> +#define	PAD		_XSTR(__LINE__)
> +
> +/*
> + * struct aidmp - device management plugin "wrapper" registers.
> + */
> +struct aidmp {

This looks like it should be __packed__.

> +	u32 oobselina30;	/* 0x000 */
> +	u32 oobselina74;	/* 0x004 */
> +	u32 PAD[6];
...
> +};
...
> +struct axi_local *axi_create(u32 priv_len)
> +{
> +	struct axi_local *inst;
> +	int size = ALIGN(sizeof(*inst), 4) + priv_len;
> +
> +	inst = kzalloc(size, GFP_ATOMIC);

Hmm, ATOMIC without checking the retval. This is prepared for its first
crash under a high memory pressure.

> +	try_module_get(THIS_MODULE);
> +
> +	return inst;
> +}
> +struct axi_instance *axi_open(void *regs, u32 erombase, u32 priv_len)
> +{
> +	struct axi_local *inst = axi_create(priv_len);
> +
> +	/* fill public fields */
> +	inst->pub.regs = regs;
> +	inst->pub.priv = (char *)inst + ALIGN(sizeof(*inst), 4);
> +
> +	inst->enum_rom_ptr = ioremap_nocache((unsigned long)erombase,
> +					     AXI_CORE_SIZE);

Check retval.

> +	return &inst->pub;
> +}
...

regards,
-- 
js
suse labs
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/