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DivestOS/Patches/LineageOS-14.1/android_hardware_qcom_media/227622.patch
Tad b6575a362e Small tweaks 
Signed-off-by: Tad <tad@spotco.us>
2021-11-02 22:47:34 -04:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Santhosh Behara <santhoshbehara@codeaurora.org>
Date: Tue, 15 May 2018 06:09:50 -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 bullhead/nyc-dev
Change-Id: Iabbb2d7e00ff97bfc47b04386feec66976fca99a
(cherry picked from commit 83aeab22d1bdc493b3ea2f50616bb8fd460d6c74)
---
mm-video-v4l2/vidc/vdec/inc/omx_vdec.h | 3 +-
.../vidc/vdec/src/omx_vdec_msm8974.cpp | 34 +++++++++++++++----
2 files changed, 29 insertions(+), 8 deletions(-)
diff --git a/mm-video-v4l2/vidc/vdec/inc/omx_vdec.h b/mm-video-v4l2/vidc/vdec/inc/omx_vdec.h
index 59f81a7c4..a34675507 100644
--- a/mm-video-v4l2/vidc/vdec/inc/omx_vdec.h
+++ b/mm-video-v4l2/vidc/vdec/inc/omx_vdec.h
@@ -1,5 +1,5 @@
/*--------------------------------------------------------------------------
-Copyright (c) 2010 - 2015, The Linux Foundation. All rights reserved.
+Copyright (c) 2010 - 2015, 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
@@ -1171,6 +1171,7 @@ class omx_vdec: public qc_omx_component
}
};
client_extradata_info m_client_extradata_info;
+ bool m_buffer_error;
};
#ifdef _MSM8974_
diff --git a/mm-video-v4l2/vidc/vdec/src/omx_vdec_msm8974.cpp b/mm-video-v4l2/vidc/vdec/src/omx_vdec_msm8974.cpp
index d1311f6ce..11b882aac 100644
--- a/mm-video-v4l2/vidc/vdec/src/omx_vdec_msm8974.cpp
+++ b/mm-video-v4l2/vidc/vdec/src/omx_vdec_msm8974.cpp
@@ -1,5 +1,5 @@
/*--------------------------------------------------------------------------
-Copyright (c) 2010 - 2015, The Linux Foundation. All rights reserved.
+Copyright (c) 2010 - 2015, 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:
@@ -596,7 +596,8 @@ omx_vdec::omx_vdec(): m_error_propogated(false),
stereo_output_mode(HAL_NO_3D),
m_last_rendered_TS(-1),
m_queued_codec_config_count(0),
- secure_scaling_to_non_secure_opb(false)
+ secure_scaling_to_non_secure_opb(false),
+ m_buffer_error(false)
{
/* Assumption is that , to begin with , we have all the frames with decoder */
DEBUG_PRINT_HIGH("In %u bit OMX vdec Constructor", (unsigned int)sizeof(long) * 8);
@@ -4753,6 +4754,7 @@ 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) {
@@ -5168,7 +5170,6 @@ 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) {
@@ -5374,11 +5375,13 @@ 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;
+
if (bytes != drv_ctx.ip_buf.buffer_size) {
DEBUG_PRINT_LOW("Requested Size is wrong %u epected is %u",
(unsigned int)bytes, (unsigned int)drv_ctx.ip_buf.buffer_size);
@@ -5433,8 +5436,10 @@ 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 ? ION_SECURE : ION_FLAG_CACHED);
if (drv_ctx.ip_buf_ion_info[i].ion_device_fd < 0) {
@@ -5927,6 +5932,10 @@ 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 {
@@ -5987,6 +5996,7 @@ 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");
@@ -6003,7 +6013,7 @@ 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");
@@ -6011,7 +6021,6 @@ OMX_ERRORTYPE omx_vdec::free_buffer(OMX_IN OMX_HANDLETYPE hComp,
OMX_ErrorPortUnpopulated,
OMX_COMPONENT_GENERATE_EVENT);
}
-
if (port == OMX_CORE_INPUT_PORT_INDEX) {
/*Check if arbitrary bytes*/
if (!arbitrary_bytes && !input_use_buffer)
@@ -6108,6 +6117,7 @@ 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;
@@ -6281,6 +6291,11 @@ 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 &&
@@ -6568,6 +6583,7 @@ 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) {
@@ -6576,6 +6592,10 @@ 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*/
@@ -7762,7 +7782,7 @@ int omx_vdec::async_message_process (void *context, void* message)
output_respbuf->pic_type = PICTURE_TYPE_B;
}
- if (omx->output_use_buffer)
+ if (!omx->m_enable_android_native_buffers && omx->output_use_buffer)
memcpy ( omxhdr->pBuffer, (void *)
((unsigned long)vdec_msg->msgdata.output_frame.bufferaddr +
(unsigned long)vdec_msg->msgdata.output_frame.offset),
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