linux-kernel - kernel/param.c: add_sysfs

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Message-ID: <1304920615.19586.21.camel@Joe-Laptop>
Date:	Sun, 08 May 2011 22:56:55 -0700
From:	Joe Perches <joe@...ches.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: kernel/param.c: add_sysfs_param memset?

Looks wrong to me.

static __modinit int add_sysfs_param(struct module_kobject *mk,
				     const struct kernel_param *kp,
				     const char *name)
{
	struct module_param_attrs *new;
	struct attribute **attrs;
[]
	if (!mk->mp) {
		num = 0;
		attrs = NULL;
	} else {
		num = mk->mp->num;
		attrs = mk->mp->grp.attrs;
	}

	/* Enlarge. */
[]
	attrs = krealloc(attrs, sizeof(new->grp.attrs[0])*(num+2), GFP_KERNEL);
[]
	memset(&attrs[num], 0, sizeof(attrs[num]));

sizeof(attrs[num]) is a pointer.

I presume this should be
	memset(&attrs[num], 0, sizeof(*attrs[num]));
or
	memset(&attrs[num], 0, sizeof(struct attribute));

If it's really just to set the pointer, a set to NULL is better.
	attrs[num] = NULL;

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