scsi: mptsas: use g_new0 to allocate MPTSASRequest object

When processing IO request in mptsas, it uses g_new to allocate
a 'req' object. If an error occurs before 'req->sreq' is
allocated, It could lead to an OOB write in mptsas_free_request
function. Use g_new0 to avoid it.

Reported-by: Li Qiang <liqiang6-s@360.cn>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-Id: <1473684251-17476-1-git-send-email-ppandit@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 670e56d3ed2918b3861d9216f2c0540d9e9ae0d5)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

diff --git a/hw/scsi/mptsas.c b/hw/scsi/mptsas.c
index be88e161a9d211b54e872c976c4dca994161dcd4..970c265de1e7b0df5ab546c62c9241efeaf46b37 100644 (file)
--- a/hw/scsi/mptsas.c
+++ b/hw/scsi/mptsas.c
@@ -304,7 +304,7 @@ static int mptsas_process_scsi_io_request(MPTSASState *s,
         goto bad;
     }
 
-    req = g_new(MPTSASRequest, 1);
+    req = g_new0(MPTSASRequest, 1);
     QTAILQ_INSERT_TAIL(&s->pending, req, next);
     req->scsi_io = *scsi_io;
     req->dev = s;