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

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

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@kernel.crashing.org>
---
 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;
     }
     memcpy(&req->crq, crq, sizeof(vscsi_crq));