From: Prasad J Pandit <pjp@fedoraproject.org>
Date: Wed, 25 May 2016 10:31:29 +0000 (+0530)
Subject: scsi: megasas: use appropriate property buffer size
X-Git-Tag: v2.7.1~314^2~19
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=1b85898025c4cd95dce673d15e67e60e98e91731;p=mirror_qemu.git

scsi: megasas: use appropriate property buffer size

When setting MegaRAID SAS controller properties via MegaRAID
Firmware Interface(MFI) commands, a user supplied size parameter
is used to set property value. Use appropriate size value to avoid
OOB access issues.

Reported-by: Li Qiang <liqiang6-s@360.cn>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-Id: <1464172291-2856-2-git-send-email-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index a63a581550..dcbd3e1f24 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -1446,7 +1446,7 @@ static int megasas_dcmd_set_properties(MegasasState *s, MegasasCmd *cmd)
                                             dcmd_size);
         return MFI_STAT_INVALID_PARAMETER;
     }
-    dma_buf_write((uint8_t *)&info, cmd->iov_size, &cmd->qsg);
+    dma_buf_write((uint8_t *)&info, dcmd_size, &cmd->qsg);
     trace_megasas_dcmd_unsupported(cmd->index, cmd->iov_size);
     return MFI_STAT_OK;
 }