Re: [PATCH] seqfile: fix uninitialized memory allocation in mounts_open()

[Alexey Dobriyan]

On 8/15/07, Fengguang Wu <wfg@xxxxxxxxxxxxxxxx> wrote:
> proc_mounts.m.buf is not explicitly zeroed at allocation time, which
> may later confuse the seqfile code and triggle an kfree(m->buf).

It's cleared in seq_open().

> --- linux.orig/fs/proc/base.c
> +++ linux/fs/proc/base.c
> @@ -380,7 +380,7 @@ static int mounts_open(struct inode *ino
>
>  	if (ns) {
>  		ret = -ENOMEM;
> -		p = kmalloc(sizeof(struct proc_mounts), GFP_KERNEL);
> +		p = kzalloc(sizeof(struct proc_mounts), GFP_KERNEL);
>  		if (p) {
>  			file->private_data = &p->m;
>  			ret = seq_open(file, &mounts_op);
-
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