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Perform pseudo-filesystem permission checks inside inode_reserve() and inode_remove() while the inode tree lock is held, and hold that lock across pseudorename mutations so symlink swaps cannot bypass directory checks. Hold a read lock around pseudo-fs open permission checks. On setuid/setgid exec, update saved set-IDs, mark the task group secure, sanitize dangerous environment variables, clear debug/dumpable flags, and add issetugid(), secure_getenv(), and PR_SET/GET_DUMPABLE support. Signed-off-by: Abhishek Mishra <mishra.abhishek2808@gmail.com>
46 lines
1.8 KiB
C
46 lines
1.8 KiB
C
/****************************************************************************
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* libs/libc/unistd/lib_issetugid.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 <nuttx/config.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: issetugid
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*
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* Description:
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* Stub version always reports that the process is not executing a secure
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* set-user-ID or set-group-ID image. When CONFIG_SCHED_USER_IDENTITY is
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* enabled, sched/group/group_issetugid.c provides the real version.
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*
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****************************************************************************/
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int issetugid(void)
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{
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return 0;
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}
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