Commit b78bd121 authored by Gerd Hoffmann's avatar Gerd Hoffmann Committed by Greg Kroah-Hartman

drm/qxl: use kmalloc_array to alloc reloc_info in qxl_process_single_command

commit 34855706 upstream.

This avoids integer overflows on 32bit machines when calculating
reloc_info size, as reported by Alan Cox.

Cc: gnomes@lxorguk.ukuu.org.uk
Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0f44b766
...@@ -168,7 +168,8 @@ static int qxl_process_single_command(struct qxl_device *qdev, ...@@ -168,7 +168,8 @@ static int qxl_process_single_command(struct qxl_device *qdev,
cmd->command_size)) cmd->command_size))
return -EFAULT; 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) if (!reloc_info)
return -ENOMEM; return -ENOMEM;
......
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