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SubjectRe: [PATCH 2/2] hfsplus: fix potential refcnt problem of nls module
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On Tue, 2018-04-17 at 15:05 +0800, Chengguang Xu wrote:
> When specifying nls option multiple times in a mount,
> current option parsing will cause inaccurate refcount of nls
> module. Hence, call unload_nls for previous one in this case.
>
> Signed-off-by: Chengguang Xu <cgxu519@gmx.com>


Looks good.

Reviewed-by: Vyacheslav Dubeyko <slava@dubeyko.com>

Thanks,
Vyacheslav Dubeyko.


> ---
>  fs/hfsplus/options.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/fs/hfsplus/options.c b/fs/hfsplus/options.c
> index 047e05c..068d4e2 100644
> --- a/fs/hfsplus/options.c
> +++ b/fs/hfsplus/options.c
> @@ -171,8 +171,10 @@ int hfsplus_parse_options(char *input, struct
> hfsplus_sb_info *sbi)
>   return 0;
>   }
>   p = match_strdup(&args[0]);
> - if (p)
> + if (p) {
> + unload_nls(sbi->nls);
>   sbi->nls = load_nls(p);
> + }
>   if (!sbi->nls) {
>   pr_err("unable to load nls mapping
> \"%s\"\n",
>          p);

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