From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Ray Essick Date: Mon, 2 Jul 2018 16:00:09 -0700 Subject: [PATCH] mm-video-v4l2: Protect buffer access and increase input buffer size Protect buffer access for below scenarios: *Increase the scope of buf_lock in free_buffer to avoid access of freed buffer for both input and output buffers. Also, add check before output buffer access. *Disallow allocate buffer mode after client has called use buffer. Allocate additional 512 bytes of memory for input buffers on top of allocation size as per hardware requirement. Bug: 64340487 Test: ran POC on sailfish/nyc-mr1-dev Change-Id: Ic13b511b2d1c46e0b158880c41c9a02e2fefd113 Merged-In: Id699404d6c276c8702826d79b3a6ba9755b3439f (cherry picked from commit 660db9e9708872f9a407ac14e92a5017599ced34) --- .../mm-video-v4l2/vidc/vdec/inc/omx_vdec.h | 3 +- .../vidc/vdec/src/omx_vdec_v4l2.cpp | 32 +++++++++++++++---- 2 files changed, 28 insertions(+), 7 deletions(-) diff --git a/msm8996/mm-video-v4l2/vidc/vdec/inc/omx_vdec.h b/msm8996/mm-video-v4l2/vidc/vdec/inc/omx_vdec.h index d400fc39e..f0958b166 100644 --- a/msm8996/mm-video-v4l2/vidc/vdec/inc/omx_vdec.h +++ b/msm8996/mm-video-v4l2/vidc/vdec/inc/omx_vdec.h @@ -1,5 +1,5 @@ /*-------------------------------------------------------------------------- -Copyright (c) 2010 - 2016, The Linux Foundation. All rights reserved. +Copyright (c) 2010 - 2016, 2018, The Linux Foundation. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions @@ -1173,6 +1173,7 @@ class omx_vdec: public qc_omx_component static OMX_ERRORTYPE describeColorFormat(OMX_PTR params); void prefetchNewBuffers(); + bool m_buffer_error; }; #ifdef _MSM8974_ diff --git a/msm8996/mm-video-v4l2/vidc/vdec/src/omx_vdec_v4l2.cpp b/msm8996/mm-video-v4l2/vidc/vdec/src/omx_vdec_v4l2.cpp index 9d041e990..003cd9b56 100644 --- a/msm8996/mm-video-v4l2/vidc/vdec/src/omx_vdec_v4l2.cpp +++ b/msm8996/mm-video-v4l2/vidc/vdec/src/omx_vdec_v4l2.cpp @@ -1,5 +1,5 @@ /*-------------------------------------------------------------------------- -Copyright (c) 2010 - 2016, The Linux Foundation. All rights reserved. +Copyright (c) 2010 - 2016, 2018, The Linux Foundation. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: @@ -647,7 +647,8 @@ omx_vdec::omx_vdec(): m_error_propogated(false), m_queued_codec_config_count(0), current_perf_level(V4L2_CID_MPEG_VIDC_PERF_LEVEL_NOMINAL), secure_scaling_to_non_secure_opb(false), - m_force_compressed_for_dpb(false) + m_force_compressed_for_dpb(false), + m_buffer_error(false) { m_pipe_in = -1; m_pipe_out = -1; @@ -5525,6 +5526,7 @@ OMX_ERRORTYPE omx_vdec::use_output_buffer( eRet = allocate_output_headers(); if (eRet == OMX_ErrorNone) eRet = allocate_extradata(); + output_use_buffer = true; } if (eRet == OMX_ErrorNone) { @@ -5947,7 +5949,6 @@ OMX_ERRORTYPE omx_vdec::free_input_buffer(OMX_BUFFERHEADERTYPE *bufferHdr) index = bufferHdr - m_inp_mem_ptr; DEBUG_PRINT_LOW("Free Input Buffer index = %d",index); - auto_lock l(buf_lock); bufferHdr->pInputPortPrivate = NULL; if (index < drv_ctx.ip_buf.actualcount && drv_ctx.ptr_inputbuffer) { @@ -6156,6 +6157,7 @@ OMX_ERRORTYPE omx_vdec::allocate_input_buffer( unsigned i = 0; unsigned char *buf_addr = NULL; int pmem_fd = -1; + unsigned int align_size = 0; (void) hComp; (void) port; @@ -6215,8 +6217,10 @@ OMX_ERRORTYPE omx_vdec::allocate_input_buffer( int rc; DEBUG_PRINT_LOW("Allocate input Buffer"); #ifdef USE_ION + align_size = drv_ctx.ip_buf.buffer_size + 512; + align_size = (align_size + drv_ctx.ip_buf.alignment - 1)&(~(drv_ctx.ip_buf.alignment - 1)); drv_ctx.ip_buf_ion_info[i].ion_device_fd = alloc_map_ion_memory( - drv_ctx.ip_buf.buffer_size,drv_ctx.op_buf.alignment, + align_size, drv_ctx.op_buf.alignment, &drv_ctx.ip_buf_ion_info[i].ion_alloc_data, &drv_ctx.ip_buf_ion_info[i].fd_ion_data, secure_mode ? SECURE_FLAGS_INPUT_BUFFER : ION_FLAG_CACHED); @@ -6704,6 +6708,10 @@ OMX_ERRORTYPE omx_vdec::allocate_buffer(OMX_IN OMX_HANDLETYPE hC eRet = allocate_input_buffer(hComp,bufferHdr,port,appData,bytes); } } else if (port == OMX_CORE_OUTPUT_PORT_INDEX) { + if (output_use_buffer) { + DEBUG_PRINT_ERROR("Allocate output buffer not allowed after use buffer"); + return OMX_ErrorBadParameter; + } eRet = client_buffers.allocate_buffers_color_convert(hComp,bufferHdr,port, appData,bytes); } else { @@ -6764,6 +6772,7 @@ OMX_ERRORTYPE omx_vdec::free_buffer(OMX_IN OMX_HANDLETYPE hComp, (void) hComp; DEBUG_PRINT_LOW("In for decoder free_buffer"); + auto_lock l(buf_lock); if (m_state == OMX_StateIdle && (BITMASK_PRESENT(&m_flags ,OMX_COMPONENT_LOADING_PENDING))) { DEBUG_PRINT_LOW(" free buffer while Component in Loading pending"); @@ -6780,7 +6789,7 @@ OMX_ERRORTYPE omx_vdec::free_buffer(OMX_IN OMX_HANDLETYPE hComp, post_event(OMX_EventError, OMX_ErrorPortUnpopulated, OMX_COMPONENT_GENERATE_EVENT); - + m_buffer_error = true; return OMX_ErrorIncorrectStateOperation; } else if (m_state != OMX_StateInvalid) { DEBUG_PRINT_ERROR("Invalid state to free buffer,port lost Buffers"); @@ -6885,6 +6894,7 @@ OMX_ERRORTYPE omx_vdec::free_buffer(OMX_IN OMX_HANDLETYPE hComp, BITMASK_CLEAR((&m_flags),OMX_COMPONENT_LOADING_PENDING); post_event(OMX_CommandStateSet, OMX_StateLoaded, OMX_COMPONENT_GENERATE_EVENT); + m_buffer_error = false; } } return eRet; @@ -7054,6 +7064,11 @@ OMX_ERRORTYPE omx_vdec::empty_this_buffer_proxy(OMX_IN OMX_HANDLETYPE hComp, if (!temp_buffer || (temp_buffer - drv_ctx.ptr_inputbuffer) > (int)drv_ctx.ip_buf.actualcount) { return OMX_ErrorBadParameter; } + + if (BITMASK_ABSENT(&m_inp_bm_count, nPortIndex) || m_buffer_error) { + DEBUG_PRINT_ERROR("ETBProxy: ERROR: invalid buffer, nPortIndex %u", nPortIndex); + return OMX_ErrorBadParameter; + } /* If its first frame, H264 codec and reject is true, then parse the nal and get the profile. Based on this, reject the clip playback */ if (first_frame == 0 && codec_type_parse == CODEC_TYPE_H264 && @@ -7343,6 +7358,7 @@ OMX_ERRORTYPE omx_vdec::fill_this_buffer_proxy( struct vdec_bufferpayload *ptr_outputbuffer = NULL; struct vdec_output_frameinfo *ptr_respbuffer = NULL; + auto_lock l(buf_lock); nPortIndex = buffer-((OMX_BUFFERHEADERTYPE *)client_buffers.get_il_buf_hdr()); if (bufferAdd == NULL || nPortIndex >= drv_ctx.op_buf.actualcount) { @@ -7351,6 +7367,10 @@ OMX_ERRORTYPE omx_vdec::fill_this_buffer_proxy( return OMX_ErrorBadParameter; } + if (BITMASK_ABSENT(&m_out_bm_count, nPortIndex) || m_buffer_error) { + DEBUG_PRINT_ERROR("FTBProxy: ERROR: invalid buffer, nPortIndex %u", nPortIndex); + return OMX_ErrorBadParameter; + } DEBUG_PRINT_LOW("FTBProxy: bufhdr = %p, bufhdr->pBuffer = %p", bufferAdd, bufferAdd->pBuffer); /*Return back the output buffer to client*/ @@ -8624,7 +8644,7 @@ int omx_vdec::async_message_process (void *context, void* message) if (omxhdr && omxhdr->nFilledLen) { omx->request_perf_level(VIDC_NOMINAL); } - if (omx->output_use_buffer && omxhdr->pBuffer && + if (!omx->m_enable_android_native_buffers && omx->output_use_buffer && omxhdr->pBuffer && vdec_msg->msgdata.output_frame.bufferaddr) memcpy ( omxhdr->pBuffer, (void *) ((unsigned long)vdec_msg->msgdata.output_frame.bufferaddr +