Re: [PATCH] scsi: sni_53c710: Fix a resource leak in an error handling path

[Thomas Bogendoerfer <tsbogend@alpha.franken.de>]

On Thu, May 20, 2021 at 06:44:25AM +0200, Christophe JAILLET wrote:
> After a successful 'NCR_700_detect()' call, 'NCR_700_release()' must be
> called to release some DMA related resources, as already done in the
> remove function.
> 
> Fixes: c27d85f3f3c5 ("[SCSI] SNI RM 53c710 driver")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
>  drivers/scsi/sni_53c710.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/scsi/sni_53c710.c b/drivers/scsi/sni_53c710.c
> index 678651b9b4dd..f6d60d542207 100644
> --- a/drivers/scsi/sni_53c710.c
> +++ b/drivers/scsi/sni_53c710.c
> @@ -98,6 +98,7 @@ static int snirm710_probe(struct platform_device *dev)
>  
>   out_put_host:
>  	scsi_host_put(host);
> +	NCR_700_release(host);

shouldn't this done before the scsi_host_put() to avoid a use after free ?
lasi700.c has the same problem. And it looks like NCR_700_detect() will leak
dma memory, if scsi_host_alloc() failed.

Thomas.

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