[Qemu-devel] [PULL 12/31] scsi: megasas: use appropriate property buffer size

[Paolo Bonzini]

From: Prasad J Pandit <address@hidden>

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 <address@hidden>
Signed-off-by: Prasad J Pandit <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
 hw/scsi/megasas.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index a63a581..dcbd3e1 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;
 }
-- 
2.5.5