[PATCH][next] KEYS: trusted: Fix missing null return from kzalloc call

[Jarkko Sakkinen]

On Mon, Apr 12, 2021 at 05:01:01PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king at canonical.com>
> 
> The kzalloc call can return null with the GFP_KERNEL flag so
> add a null check and exit via a new error exit label. Use the
> same exit error label for another error path too.
> 
> Addresses-Coverity: ("Dereference null return value")
> Fixes: 830027e2cb55 ("KEYS: trusted: Add generic trusted keys framework")
> Signed-off-by: Colin Ian King <colin.king at canonical.com>
 
Reviewed-by: Jarkko Sakkinen <jarkko at kernel.org>

/Jarkko