| From | Kamal Mostafa <> | Subject | [PATCH 3.13.y-ckt 097/138] drm/qxl: use kmalloc_array to alloc reloc_info in qxl_process_single_command | Date | Wed, 9 Mar 2016 15:13:44 -0800 |
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3.13.11-ckt36 -stable review patch. If anyone has any objections, please let me know.
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From: Gerd Hoffmann <kraxel@redhat.com>
commit 34855706c30d52b0a744da44348b5d1cc39fbe51 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: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/gpu/drm/qxl/qxl_ioctl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/qxl/qxl_ioctl.c b/drivers/gpu/drm/qxl/qxl_ioctl.c index 729debf..9400858 100644 --- a/drivers/gpu/drm/qxl/qxl_ioctl.c +++ b/drivers/gpu/drm/qxl/qxl_ioctl.c @@ -168,7 +168,8 @@ 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; -- 2.7.0
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