Re: [Qemu-devel] [PATCH] spapr_vscsi: Error handling fixes

[Andreas Färber <afaerber@xxxxxxx>]

Am 19.06.2012 08:02, schrieb Benjamin Herrenschmidt:
> We were incorrectly g_free'ing an object that isn't allocated
> in one error path and failed to release it completely in another
> 
> This fixes qemu crashes with some cases of IO errors.
> 
> Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
> ---
>  hw/spapr_vscsi.c |    4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/spapr_vscsi.c b/hw/spapr_vscsi.c
> index d2fe3e5..6afc3b4 100644
> --- a/hw/spapr_vscsi.c
> +++ b/hw/spapr_vscsi.c
> @@ -801,6 +801,7 @@ static void vscsi_got_payload(VSCSIState *s, vscsi_crq *crq)
>      if (crq->s.IU_length > sizeof(union viosrp_iu)) {
>          fprintf(stderr, "VSCSI: SRP IU too long (%d bytes) !\n",
>                  crq->s.IU_length);
> +        vscsi_put_req(req);
>          return;
>      }
>  
> @@ -808,7 +809,8 @@ static void vscsi_got_payload(VSCSIState *s, vscsi_crq *crq)
>      if (spapr_vio_dma_read(&s->vdev, crq->s.IU_data_ptr, &req->iu,
>                             crq->s.IU_length)) {
>          fprintf(stderr, "vscsi_got_payload: DMA read failure !\n");
> -        g_free(req);
> +        vscsi_put_req(req);

> +	return;

Tab alert. :)

/-F

>      }
>      memcpy(&req->crq, crq, sizeof(vscsi_crq));
>  
> 
> 
> 


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