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SubjectRe: [PATCH] autofs4 - detect invalid direct mount requests
On Fri, 20 Jun 2008 13:13:03 +0800
Ian Kent <raven@themaw.net> wrote:

> autofs v5 dierct and offset mounts within an autofs filesystem are
> triggered by existing autofs triger mounts so the mount point dentry
> must be positive. If the mount point dentry is negative then the
> trigger doesn't exist so we can return fail immediately.
>
> Signed-off-by: Ian Kent <raven@themaw.net>
>
> ---
>
> fs/autofs4/waitq.c | 4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
>
> diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
> index cd21fd4..ae637d9 100644
> --- a/fs/autofs4/waitq.c
> +++ b/fs/autofs4/waitq.c
> @@ -307,6 +307,10 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
> if (sbi->catatonic)
> return -ENOENT;
>
> + if (!dentry->d_inode &&
> + (sbi->type & (AUTOFS_TYPE_DIRECT | AUTOFS_TYPE_OFFSET)))
> + return -ENOENT;
> +
> name = kmalloc(NAME_MAX + 1, GFP_KERNEL);
> if (!name)
> return -ENOMEM;

A good changelog would allow little old me to determine whether this
patch should be merged into 2.6.25 and/or 2.6.26 and/or 2.6.27. This
wasn't a good changelog :(



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