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Kernel: Demonstrate crash for invalid pointers

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Ben Wiederhake 2021-01-31 13:28:18 +01:00 committed by Andreas Kling
parent bda572ef48
commit 92cee5bdf5
Notes: sideshowbarker 2024-07-18 22:39:40 +09:00 
Author: https://github.com/BenWiederhake
Commit: https://github.com/SerenityOS/serenity/commit/92cee5bdf51
Pull-request: https://github.com/SerenityOS/serenity/pull/5197
Reviewed-by: https://github.com/linusg
1 changed files with 56 additions and 0 deletions
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Userland/Tests/Kernel/invalid-path-pointer-assert.cpp Normal file
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/*
* Copyright (c) 2021, Ben Wiederhake <BenWiederhake.GitHub@gmx.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <Kernel/API/Syscall.h>
#include <errno.h>
#include <stdio.h>
#include <sys/stat.h>
int main()
{
struct stat statbuf;
// stat(3) would call strlen, and we can't have that.
Syscall::SC_stat_params params {
// Hey Kernel, please try to read the path from this totally valid location!
{ (const char*)0xc000dead, 50 },
&statbuf, false
};
int rc = syscall(SC_stat, &params);
if (rc == 0) {
printf("stat passed?!\n");
printf("FAIL\n");
return 1;
}
if (rc != EFAULT) {
printf("error other than EFAULT?! rc = %d\n", rc);
printf("FAIL\n");
return 1;
}
printf("PASS\n");
return 0;
}