Re: [PATCH] afs: kstrdup() memory handling

[Jeff Epler]

On Sat, Mar 21, 2015 at 01:13:59PM -0400, Sanidhya Kashyap wrote:
> Handling kstrdup() failure in case of memory pressure even
> for new_opts.
> 
> Signed-off-by: Sanidhya Kashyap <sanidhya.gat...@gmail.com>

Reviewed-by: Jeff Epler <jep...@unpythonic.net>

> ---
>  fs/afs/super.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/afs/super.c b/fs/afs/super.c
> index c486155..477f38e 100644
> --- a/fs/afs/super.c
> +++ b/fs/afs/super.c
> @@ -360,10 +360,13 @@ static struct dentry *afs_mount(struct file_system_type 
> *fs_type,
>       struct key *key;
>       char *new_opts = kstrdup(options, GFP_KERNEL);
>       struct afs_super_info *as;
> -     int ret;
> +     int ret = -ENOMEM;
>  
>       _enter(",,%s,%p", dev_name, options);
>  
> +     if (!new_opts)
> +             goto error_out;
> +
>       memset(&params, 0, sizeof(params));
>  
>       ret = -EINVAL;
> @@ -441,6 +444,7 @@ error:
>       afs_put_cell(params.cell);
>       key_put(params.key);
>       kfree(new_opts);
> +error_out:
>       _leave(" = %d", ret);
>       return ERR_PTR(ret);
>  }
> -- 
> 2.1.0
> 
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