Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 419 insertions, 0 deletions

diff --git a/sound/soc/sof/ipc3-loader.c b/sound/soc/sof/ipc3-loader.c
new file mode 100644
index 000000000..7e9c76d5b
--- /dev/null
+++ b/sound/soc/sof/ipc3-loader.c
@@ -0,0 +1,419 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license.  When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2022 Intel Corporation
+
+#include <linux/firmware.h>
+#include "sof-priv.h"
+#include "sof-audio.h"
+#include "ipc3-priv.h"
+#include "ops.h"
+
+static int ipc3_fw_ext_man_get_version(struct snd_sof_dev *sdev,
+				       const struct sof_ext_man_elem_header *hdr)
+{
+	const struct sof_ext_man_fw_version *v =
+		container_of(hdr, struct sof_ext_man_fw_version, hdr);
+
+	memcpy(&sdev->fw_ready.version, &v->version, sizeof(v->version));
+	sdev->fw_ready.flags = v->flags;
+
+	/* log ABI versions and check FW compatibility */
+	return sof_ipc3_validate_fw_version(sdev);
+}
+
+static int ipc3_fw_ext_man_get_windows(struct snd_sof_dev *sdev,
+				       const struct sof_ext_man_elem_header *hdr)
+{
+	const struct sof_ext_man_window *w;
+
+	w = container_of(hdr, struct sof_ext_man_window, hdr);
+
+	return sof_ipc3_get_ext_windows(sdev, &w->ipc_window.ext_hdr);
+}
+
+static int ipc3_fw_ext_man_get_cc_info(struct snd_sof_dev *sdev,
+				       const struct sof_ext_man_elem_header *hdr)
+{
+	const struct sof_ext_man_cc_version *cc;
+
+	cc = container_of(hdr, struct sof_ext_man_cc_version, hdr);
+
+	return sof_ipc3_get_cc_info(sdev, &cc->cc_version.ext_hdr);
+}
+
+static int ipc3_fw_ext_man_get_dbg_abi_info(struct snd_sof_dev *sdev,
+					    const struct sof_ext_man_elem_header *hdr)
+{
+	const struct ext_man_dbg_abi *dbg_abi =
+		container_of(hdr, struct ext_man_dbg_abi, hdr);
+
+	if (sdev->first_boot)
+		dev_dbg(sdev->dev,
+			"Firmware: DBG_ABI %d:%d:%d\n",
+			SOF_ABI_VERSION_MAJOR(dbg_abi->dbg_abi.abi_dbg_version),
+			SOF_ABI_VERSION_MINOR(dbg_abi->dbg_abi.abi_dbg_version),
+			SOF_ABI_VERSION_PATCH(dbg_abi->dbg_abi.abi_dbg_version));
+
+	return 0;
+}
+
+static int ipc3_fw_ext_man_get_config_data(struct snd_sof_dev *sdev,
+					   const struct sof_ext_man_elem_header *hdr)
+{
+	const struct sof_ext_man_config_data *config =
+		container_of(hdr, struct sof_ext_man_config_data, hdr);
+	const struct sof_config_elem *elem;
+	int elems_counter;
+	int elems_size;
+	int ret = 0;
+	int i;
+
+	/* calculate elements counter */
+	elems_size = config->hdr.size - sizeof(struct sof_ext_man_elem_header);
+	elems_counter = elems_size / sizeof(struct sof_config_elem);
+
+	dev_dbg(sdev->dev, "manifest can hold up to %d config elements\n", elems_counter);
+
+	for (i = 0; i < elems_counter; ++i) {
+		elem = &config->elems[i];
+		dev_dbg(sdev->dev, "get index %d token %d val %d\n",
+			i, elem->token, elem->value);
+		switch (elem->token) {
+		case SOF_EXT_MAN_CONFIG_EMPTY:
+			/* unused memory space is zero filled - mapped to EMPTY elements */
+			break;
+		case SOF_EXT_MAN_CONFIG_IPC_MSG_SIZE:
+			/* TODO: use ipc msg size from config data */
+			break;
+		case SOF_EXT_MAN_CONFIG_MEMORY_USAGE_SCAN:
+			if (sdev->first_boot && elem->value)
+				ret = snd_sof_dbg_memory_info_init(sdev);
+			break;
+		default:
+			dev_info(sdev->dev,
+				 "Unknown firmware configuration token %d value %d",
+				 elem->token, elem->value);
+			break;
+		}
+		if (ret < 0) {
+			dev_err(sdev->dev,
+				"%s: processing failed for token %d value %#x, %d\n",
+				__func__, elem->token, elem->value, ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static ssize_t ipc3_fw_ext_man_size(struct snd_sof_dev *sdev, const struct firmware *fw)
+{
+	const struct sof_ext_man_header *head;
+
+	head = (struct sof_ext_man_header *)fw->data;
+
+	/*
+	 * assert fw size is big enough to contain extended manifest header,
+	 * it prevents from reading unallocated memory from `head` in following
+	 * step.
+	 */
+	if (fw->size < sizeof(*head))
+		return -EINVAL;
+
+	/*
+	 * When fw points to extended manifest,
+	 * then first u32 must be equal SOF_EXT_MAN_MAGIC_NUMBER.
+	 */
+	if (head->magic == SOF_EXT_MAN_MAGIC_NUMBER)
+		return head->full_size;
+
+	/* otherwise given fw don't have an extended manifest */
+	dev_dbg(sdev->dev, "Unexpected extended manifest magic number: %#x\n",
+		head->magic);
+	return 0;
+}
+
+static size_t sof_ipc3_fw_parse_ext_man(struct snd_sof_dev *sdev)
+{
+	const struct firmware *fw = sdev->basefw.fw;
+	const struct sof_ext_man_elem_header *elem_hdr;
+	const struct sof_ext_man_header *head;
+	ssize_t ext_man_size;
+	ssize_t remaining;
+	uintptr_t iptr;
+	int ret = 0;
+
+	head = (struct sof_ext_man_header *)fw->data;
+	remaining = head->full_size - head->header_size;
+	if (remaining < 0 || remaining > sdev->basefw.fw->size)
+		return -EINVAL;
+	ext_man_size = ipc3_fw_ext_man_size(sdev, fw);
+
+	/* Assert firmware starts with extended manifest */
+	if (ext_man_size <= 0)
+		return ext_man_size;
+
+	/* incompatible version */
+	if (SOF_EXT_MAN_VERSION_INCOMPATIBLE(SOF_EXT_MAN_VERSION,
+					     head->header_version)) {
+		dev_err(sdev->dev,
+			"extended manifest version %#x differ from used %#x\n",
+			head->header_version, SOF_EXT_MAN_VERSION);
+		return -EINVAL;
+	}
+
+	/* get first extended manifest element header */
+	iptr = (uintptr_t)fw->data + head->header_size;
+
+	while (remaining > sizeof(*elem_hdr)) {
+		elem_hdr = (struct sof_ext_man_elem_header *)iptr;
+
+		dev_dbg(sdev->dev, "found sof_ext_man header type %d size %#x\n",
+			elem_hdr->type, elem_hdr->size);
+
+		if (elem_hdr->size < sizeof(*elem_hdr) ||
+		    elem_hdr->size > remaining) {
+			dev_err(sdev->dev,
+				"invalid sof_ext_man header size, type %d size %#x\n",
+				elem_hdr->type, elem_hdr->size);
+			return -EINVAL;
+		}
+
+		/* process structure data */
+		switch (elem_hdr->type) {
+		case SOF_EXT_MAN_ELEM_FW_VERSION:
+			ret = ipc3_fw_ext_man_get_version(sdev, elem_hdr);
+			break;
+		case SOF_EXT_MAN_ELEM_WINDOW:
+			ret = ipc3_fw_ext_man_get_windows(sdev, elem_hdr);
+			break;
+		case SOF_EXT_MAN_ELEM_CC_VERSION:
+			ret = ipc3_fw_ext_man_get_cc_info(sdev, elem_hdr);
+			break;
+		case SOF_EXT_MAN_ELEM_PROBE_INFO:
+			dev_dbg(sdev->dev, "Probe info (not parsed)\n");
+			break;
+		case SOF_EXT_MAN_ELEM_DBG_ABI:
+			ret = ipc3_fw_ext_man_get_dbg_abi_info(sdev, elem_hdr);
+			break;
+		case SOF_EXT_MAN_ELEM_CONFIG_DATA:
+			ret = ipc3_fw_ext_man_get_config_data(sdev, elem_hdr);
+			break;
+		case SOF_EXT_MAN_ELEM_PLATFORM_CONFIG_DATA:
+			ret = snd_sof_dsp_parse_platform_ext_manifest(sdev, elem_hdr);
+			break;
+		default:
+			dev_info(sdev->dev,
+				 "unknown sof_ext_man header type %d size %#x\n",
+				 elem_hdr->type, elem_hdr->size);
+			break;
+		}
+
+		if (ret < 0) {
+			dev_err(sdev->dev,
+				"failed to parse sof_ext_man header type %d size %#x\n",
+				elem_hdr->type, elem_hdr->size);
+			return ret;
+		}
+
+		remaining -= elem_hdr->size;
+		iptr += elem_hdr->size;
+	}
+
+	if (remaining) {
+		dev_err(sdev->dev, "error: sof_ext_man header is inconsistent\n");
+		return -EINVAL;
+	}
+
+	return ext_man_size;
+}
+
+/* generic module parser for mmaped DSPs */
+static int sof_ipc3_parse_module_memcpy(struct snd_sof_dev *sdev,
+					struct snd_sof_mod_hdr *module)
+{
+	struct snd_sof_blk_hdr *block;
+	int count, ret;
+	u32 offset;
+	size_t remaining;
+
+	dev_dbg(sdev->dev, "new module size %#x blocks %#x type %#x\n",
+		module->size, module->num_blocks, module->type);
+
+	block = (struct snd_sof_blk_hdr *)((u8 *)module + sizeof(*module));
+
+	/* module->size doesn't include header size */
+	remaining = module->size;
+	for (count = 0; count < module->num_blocks; count++) {
+		/* check for wrap */
+		if (remaining < sizeof(*block)) {
+			dev_err(sdev->dev, "not enough data remaining\n");
+			return -EINVAL;
+		}
+
+		/* minus header size of block */
+		remaining -= sizeof(*block);
+
+		if (block->size == 0) {
+			dev_warn(sdev->dev,
+				 "warning: block %d size zero\n", count);
+			dev_warn(sdev->dev, " type %#x offset %#x\n",
+				 block->type, block->offset);
+			continue;
+		}
+
+		switch (block->type) {
+		case SOF_FW_BLK_TYPE_RSRVD0:
+		case SOF_FW_BLK_TYPE_ROM...SOF_FW_BLK_TYPE_RSRVD14:
+			continue;	/* not handled atm */
+		case SOF_FW_BLK_TYPE_IRAM:
+		case SOF_FW_BLK_TYPE_DRAM:
+		case SOF_FW_BLK_TYPE_SRAM:
+			offset = block->offset;
+			break;
+		default:
+			dev_err(sdev->dev, "%s: bad type %#x for block %#x\n",
+				__func__, block->type, count);
+			return -EINVAL;
+		}
+
+		dev_dbg(sdev->dev, "block %d type %#x size %#x ==>  offset %#x\n",
+			count, block->type, block->size, offset);
+
+		/* checking block->size to avoid unaligned access */
+		if (block->size % sizeof(u32)) {
+			dev_err(sdev->dev, "%s: invalid block size %#x\n",
+				__func__, block->size);
+			return -EINVAL;
+		}
+		ret = snd_sof_dsp_block_write(sdev, block->type, offset,
+					      block + 1, block->size);
+		if (ret < 0) {
+			dev_err(sdev->dev, "%s: write to block type %#x failed\n",
+				__func__, block->type);
+			return ret;
+		}
+
+		if (remaining < block->size) {
+			dev_err(sdev->dev, "%s: not enough data remaining\n", __func__);
+			return -EINVAL;
+		}
+
+		/* minus body size of block */
+		remaining -= block->size;
+		/* next block */
+		block = (struct snd_sof_blk_hdr *)((u8 *)block + sizeof(*block)
+			+ block->size);
+	}
+
+	return 0;
+}
+
+static int sof_ipc3_load_fw_to_dsp(struct snd_sof_dev *sdev)
+{
+	u32 payload_offset = sdev->basefw.payload_offset;
+	const struct firmware *fw = sdev->basefw.fw;
+	struct snd_sof_fw_header *header;
+	struct snd_sof_mod_hdr *module;
+	int (*load_module)(struct snd_sof_dev *sof_dev, struct snd_sof_mod_hdr *hdr);
+	size_t remaining;
+	int ret, count;
+
+	if (!fw)
+		return -EINVAL;
+
+	header = (struct snd_sof_fw_header *)(fw->data + payload_offset);
+	load_module = sof_ops(sdev)->load_module;
+	if (!load_module) {
+		dev_dbg(sdev->dev, "Using generic module loading\n");
+		load_module = sof_ipc3_parse_module_memcpy;
+	} else {
+		dev_dbg(sdev->dev, "Using custom module loading\n");
+	}
+
+	/* parse each module */
+	module = (struct snd_sof_mod_hdr *)(fw->data + payload_offset + sizeof(*header));
+	remaining = fw->size - sizeof(*header) - payload_offset;
+	/* check for wrap */
+	if (remaining > fw->size) {
+		dev_err(sdev->dev, "%s: fw size smaller than header size\n", __func__);
+		return -EINVAL;
+	}
+
+	for (count = 0; count < header->num_modules; count++) {
+		/* check for wrap */
+		if (remaining < sizeof(*module)) {
+			dev_err(sdev->dev, "%s: not enough data for a module\n",
+				__func__);
+			return -EINVAL;
+		}
+
+		/* minus header size of module */
+		remaining -= sizeof(*module);
+
+		/* module */
+		ret = load_module(sdev, module);
+		if (ret < 0) {
+			dev_err(sdev->dev, "%s: invalid module %d\n", __func__, count);
+			return ret;
+		}
+
+		if (remaining < module->size) {
+			dev_err(sdev->dev, "%s: not enough data remaining\n", __func__);
+			return -EINVAL;
+		}
+
+		/* minus body size of module */
+		remaining -=  module->size;
+		module = (struct snd_sof_mod_hdr *)((u8 *)module +
+			 sizeof(*module) + module->size);
+	}
+
+	return 0;
+}
+
+static int sof_ipc3_validate_firmware(struct snd_sof_dev *sdev)
+{
+	u32 payload_offset = sdev->basefw.payload_offset;
+	const struct firmware *fw = sdev->basefw.fw;
+	struct snd_sof_fw_header *header;
+	size_t fw_size = fw->size - payload_offset;
+
+	if (fw->size <= payload_offset) {
+		dev_err(sdev->dev,
+			"firmware size must be greater than firmware offset\n");
+		return -EINVAL;
+	}
+
+	/* Read the header information from the data pointer */
+	header = (struct snd_sof_fw_header *)(fw->data + payload_offset);
+
+	/* verify FW sig */
+	if (strncmp(header->sig, SND_SOF_FW_SIG, SND_SOF_FW_SIG_SIZE) != 0) {
+		dev_err(sdev->dev, "invalid firmware signature\n");
+		return -EINVAL;
+	}
+
+	/* check size is valid */
+	if (fw_size != header->file_size + sizeof(*header)) {
+		dev_err(sdev->dev,
+			"invalid filesize mismatch got 0x%zx expected 0x%zx\n",
+			fw_size, header->file_size + sizeof(*header));
+		return -EINVAL;
+	}
+
+	dev_dbg(sdev->dev, "header size=0x%x modules=0x%x abi=0x%x size=%zu\n",
+		header->file_size, header->num_modules,
+		header->abi, sizeof(*header));
+
+	return 0;
+}
+
+const struct sof_ipc_fw_loader_ops ipc3_loader_ops = {
+	.validate = sof_ipc3_validate_firmware,
+	.parse_ext_manifest = sof_ipc3_fw_parse_ext_man,
+	.load_fw_to_dsp = sof_ipc3_load_fw_to_dsp,
+};