From dbe4f26f200db10deaf38676b96d8738afcc10c8 Mon Sep 17 00:00:00 2001 From: Kumar Behera Date: Fri, 9 Dec 2016 09:55:00 -0800 Subject: msm: cpp: Fix for integer overflow in cpp Due to integer overflow ,the bound check in config frame function may pass and this may allow user to access invalid buffer. This fix takes care of proper bound and don't allow integer overflow. CRs-Fxied: 1097709 Change-Id: I504ad591633afaba82268b5ee27a321691d75c80 Signed-off-by: Kumar Behera --- drivers/media/platform/msm/camera_v2/pproc/cpp/msm_cpp.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/media/platform/msm/camera_v2/pproc/cpp/msm_cpp.c b/drivers/media/platform/msm/camera_v2/pproc/cpp/msm_cpp.c index f64f79b..e81a9f9 100644 --- a/drivers/media/platform/msm/camera_v2/pproc/cpp/msm_cpp.c +++ b/drivers/media/platform/msm/camera_v2/pproc/cpp/msm_cpp.c @@ -2376,7 +2376,7 @@ static int msm_cpp_cfg_frame(struct cpp_device *cpp_dev, struct msm_buf_mngr_info buff_mgr_info, dup_buff_mgr_info; int32_t in_fd; int32_t num_output_bufs = 1; - int32_t stripe_base = 0; + uint32_t stripe_base = 0; uint32_t stripe_size; uint8_t tnr_enabled; enum msm_camera_buf_mngr_buf_type buf_type = @@ -2411,6 +2411,13 @@ static int msm_cpp_cfg_frame(struct cpp_device *cpp_dev, return -EINVAL; } + if (stripe_base == UINT_MAX || new_frame->num_strips > + (UINT_MAX - 1 - stripe_base) / stripe_size) { + pr_err("Invalid frame message,num_strips %d is large\n", + new_frame->num_strips); + return -EINVAL; + } + if ((stripe_base + new_frame->num_strips * stripe_size + 1) != new_frame->msg_len) { pr_err("Invalid frame message,len=%d,expected=%d\n", -- cgit v1.1