[patch 1/4] drm/qxl: integer overflow in qxl_process_single_command()

[Dan Carpenter]

This size calculation can overflow on 32 bit systems leading to memory
corruption.

Reported-by: Ilja Van Sprundel <ivansprundel at ioactive.com>
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

diff --git a/drivers/gpu/drm/qxl/qxl_ioctl.c b/drivers/gpu/drm/qxl/qxl_ioctl.c
index bda5c5f..eda6f30 100644
--- a/drivers/gpu/drm/qxl/qxl_ioctl.c
+++ b/drivers/gpu/drm/qxl/qxl_ioctl.c
@@ -168,7 +168,7 @@ static int qxl_process_single_command(struct qxl_device 
*qdev,
                       cmd->command_size))
                return -EFAULT;

-       reloc_info = kmalloc(sizeof(struct qxl_reloc_info) * cmd->relocs_num, 
GFP_KERNEL);
+       reloc_info = kmalloc_array(cmd->relocs_num, sizeof(struct 
qxl_reloc_info), GFP_KERNEL);
        if (!reloc_info)
                return -ENOMEM;