cregit-Linux how code gets into the kernel

Release 4.12 mm/rodata_test.c

Directory: mm
/*
 * rodata_test.c: functional test for mark_rodata_ro function
 *
 * (C) Copyright 2008 Intel Corporation
 * Author: Arjan van de Ven <arjan@linux.intel.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; version 2
 * of the License.
 */

#define pr_fmt(fmt) "rodata_test: " fmt

#include <linux/uaccess.h>
#include <asm/sections.h>


const int rodata_test_data = 0xC3;


void rodata_test(void) { unsigned long start, end; int zero = 0; /* test 1: read the value */ /* If this test fails, some previous testrun has clobbered the state */ if (!rodata_test_data) { pr_err("test 1 fails (start data)\n"); return; } /* test 2: write to the variable; this should fault */ if (!probe_kernel_write((void *)&rodata_test_data, (void *)&zero, sizeof(zero))) { pr_err("test data was not read only\n"); return; } /* test 3: check the value hasn't changed */ if (rodata_test_data == zero) { pr_err("test data was changed\n"); return; } /* test 4: check if the rodata section is PAGE_SIZE aligned */ start = (unsigned long)__start_rodata; end = (unsigned long)__end_rodata; if (start & (PAGE_SIZE - 1)) { pr_err("start of .rodata is not page size aligned\n"); return; } if (end & (PAGE_SIZE - 1)) { pr_err("end of .rodata is not page size aligned\n"); return; } pr_info("all tests were successful\n"); }

Contributors

PersonTokensPropCommitsCommitProp
Arjan van de Ven9064.29%133.33%
Jinbum Park4431.43%133.33%
Kees Cook64.29%133.33%
Total140100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Arjan van de Ven9257.50%125.00%
Jinbum Park5232.50%125.00%
Kees Cook138.12%125.00%
Harvey Harrison31.88%125.00%
Total160100.00%4100.00%
Directory: mm
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