Re: [PATCH] close race condition in shared memory mapping/unmapping

[Felipe W Damasio]

	Hi Neil,

Neil Horman wrote:
> +	down(&shm_ids.sem);
>  	shp = shm_lock(shmid);
>  	if(shp == NULL) {
> +		shm_unlock(shp);
> +		up(&shm_ids.sem);
>  		err = -EINVAL;
>  		goto out;
>  	}

	Trying to unlock a NULL pointer?

	Cheers,

Felipe
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