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The TCB initializes the pid early, but the argvstack is not initialized at that time. This may cause invalid addresses to be obtained when nxsched_get_stackargs is called during task enumeration. Initialize the argv pointer to NULL to enable safe validity checks. Signed-off-by: hujun5 <hujun5@xiaomi.com>
88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
/****************************************************************************
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* sched/tls/tls_initinfo.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <assert.h>
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#include <errno.h>
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#include "tls.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: tls_init_info
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*
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* Description:
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* Allocate and initialize tls_info_s structure.
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*
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* Input Parameters:
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* - tcb: The TCB of new task
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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****************************************************************************/
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int tls_init_info(FAR struct tcb_s *tcb)
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{
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FAR struct tls_info_s *info;
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/* Allocate thread local storage */
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info = up_stack_frame(tcb, tls_info_size());
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if (info == NULL)
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{
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return -ENOMEM;
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}
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DEBUGASSERT(info == tcb->stack_alloc_ptr);
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/* Initialize thread local storage */
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up_tls_initialize(info);
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/* Derive tl_size w/o arch knowledge */
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info->tl_size =
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(FAR char *)tcb->stack_base_ptr - (FAR char *)tcb->stack_alloc_ptr;
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/* Attach per-task info in group to TLS */
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info->tl_task = tcb->group->tg_info;
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/* Thread ID */
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info->tl_tid = tcb->pid;
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/* Initialize the starting address of argv to NULL to prevent
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* it from being misused.
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*/
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info->tl_argv = NULL;
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return OK;
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}
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