[PATCH] ubifs: Fix memleak in ubifs_init_authentication

[Zhihao Cheng]

在 2021/1/5 14:03, Dinghao Liu 写道:
> When crypto_shash_digestsize() fails, c->hmac_tfm
> has not been freed before returning, which leads
> to memleak.
> 
> Fixes: 49525e5eecca5 ("ubifs: Add helper functions for authentication support")
> Signed-off-by: Dinghao Liu <dinghao.liu at zju.edu.cn>
Reviewed-by: Zhihao Cheng <chengzhihao1 at huawei.com>
> ---
>   fs/ubifs/auth.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/ubifs/auth.c b/fs/ubifs/auth.c
> index 51a7c8c2c3f0..e564d5ff8781 100644
> --- a/fs/ubifs/auth.c
> +++ b/fs/ubifs/auth.c
> @@ -327,7 +327,7 @@ int ubifs_init_authentication(struct ubifs_info *c)
>   		ubifs_err(c, "hmac %s is bigger than maximum allowed hmac size (%d > %d)",
>   			  hmac_name, c->hmac_desc_len, UBIFS_HMAC_ARR_SZ);
>   		err = -EINVAL;
> -		goto out_free_hash;
> +		goto out_free_hmac;
>   	}
>   
>   	err = crypto_shash_setkey(c->hmac_tfm, ukp->data, ukp->datalen);
>