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2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d 
 kernel/drivers/misc/lkdtm/core.c
....@@ -1,23 +1,10 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * Linux Kernel Dump Test Module for testing kernel crashes conditions:
34  * induces system failures at predefined crashpoints and under predefined
45  * operational conditions in order to evaluate the reliability of kernel
56  * sanity checking and crash dumps obtained using different dumping
67  * solutions.
7
- *
8
- * This program is free software; you can redistribute it and/or modify
9
- * it under the terms of the GNU General Public License as published by
10
- * the Free Software Foundation; either version 2 of the License, or
11
- * (at your option) any later version.
12
- *
13
- * This program is distributed in the hope that it will be useful,
14
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
- * GNU General Public License for more details.
17
- *
18
- * You should have received a copy of the GNU General Public License
19
- * along with this program; if not, write to the Free Software
20
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
218  *
229  * Copyright (C) IBM Corporation, 2006
2310  *
....@@ -28,7 +15,7 @@
2815  *
2916  * Debugfs support added by Simon Kagstrom <simon.kagstrom@netinsight.net>
3017  *
31
- * See Documentation/fault-injection/provoke-crashes.txt for instructions
18
+ * See Documentation/fault-injection/provoke-crashes.rst for instructions
3219  */
3320 #include "lkdtm.h"
3421 #include <linux/fs.h>
....@@ -37,15 +24,8 @@
3724 #include <linux/kprobes.h>
3825 #include <linux/list.h>
3926 #include <linux/init.h>
40
-#include <linux/interrupt.h>
41
-#include <linux/hrtimer.h>
4227 #include <linux/slab.h>
43
-#include <scsi/scsi_cmnd.h>
4428 #include <linux/debugfs.h>
45
-
46
-#ifdef CONFIG_IDE
47
-#include <linux/ide.h>
48
-#endif
4929 
5030 #define DEFAULT_COUNT 10
5131 
....@@ -101,10 +81,8 @@
10181 	CRASHPOINT("FS_DEVRW",		 "ll_rw_block"),
10282 	CRASHPOINT("MEM_SWAPOUT",	 "shrink_inactive_list"),
10383 	CRASHPOINT("TIMERADD",		 "hrtimer_start"),
104
-	CRASHPOINT("SCSI_DISPATCH_CMD",	 "scsi_dispatch_cmd"),
105
-# ifdef CONFIG_IDE
84
+	CRASHPOINT("SCSI_QUEUE_RQ",	 "scsi_queue_rq"),
10685 	CRASHPOINT("IDE_CORE_CP",	 "generic_ide_ioctl"),
107
-# endif
10886 #endif
10987 };
11088 
....@@ -126,26 +104,34 @@
126104 	CRASHTYPE(PANIC),
127105 	CRASHTYPE(BUG),
128106 	CRASHTYPE(WARNING),
107
+	CRASHTYPE(WARNING_MESSAGE),
129108 	CRASHTYPE(EXCEPTION),
130109 	CRASHTYPE(LOOP),
131
-	CRASHTYPE(OVERFLOW),
132
-	CRASHTYPE(CORRUPT_LIST_ADD),
133
-	CRASHTYPE(CORRUPT_LIST_DEL),
134
-	CRASHTYPE(CORRUPT_USER_DS),
110
+	CRASHTYPE(EXHAUST_STACK),
135111 	CRASHTYPE(CORRUPT_STACK),
136112 	CRASHTYPE(CORRUPT_STACK_STRONG),
113
+	CRASHTYPE(CORRUPT_LIST_ADD),
114
+	CRASHTYPE(CORRUPT_LIST_DEL),
137115 	CRASHTYPE(STACK_GUARD_PAGE_LEADING),
138116 	CRASHTYPE(STACK_GUARD_PAGE_TRAILING),
117
+	CRASHTYPE(UNSET_SMEP),
118
+	CRASHTYPE(CORRUPT_PAC),
139119 	CRASHTYPE(UNALIGNED_LOAD_STORE_WRITE),
140120 	CRASHTYPE(OVERWRITE_ALLOCATION),
141121 	CRASHTYPE(WRITE_AFTER_FREE),
142122 	CRASHTYPE(READ_AFTER_FREE),
143123 	CRASHTYPE(WRITE_BUDDY_AFTER_FREE),
144124 	CRASHTYPE(READ_BUDDY_AFTER_FREE),
125
+	CRASHTYPE(SLAB_FREE_DOUBLE),
126
+	CRASHTYPE(SLAB_FREE_CROSS),
127
+	CRASHTYPE(SLAB_FREE_PAGE),
145128 	CRASHTYPE(SOFTLOCKUP),
146129 	CRASHTYPE(HARDLOCKUP),
147130 	CRASHTYPE(SPINLOCKUP),
148131 	CRASHTYPE(HUNG_TASK),
132
+	CRASHTYPE(OVERFLOW_SIGNED),
133
+	CRASHTYPE(OVERFLOW_UNSIGNED),
134
+	CRASHTYPE(ARRAY_BOUNDS),
149135 	CRASHTYPE(EXEC_DATA),
150136 	CRASHTYPE(EXEC_STACK),
151137 	CRASHTYPE(EXEC_KMALLOC),
....@@ -185,6 +171,9 @@
185171 	CRASHTYPE(USERCOPY_STACK_FRAME_FROM),
186172 	CRASHTYPE(USERCOPY_STACK_BEYOND),
187173 	CRASHTYPE(USERCOPY_KERNEL),
174
+	CRASHTYPE(STACKLEAK_ERASING),
175
+	CRASHTYPE(CFI_FORWARD_PROTO),
176
+	CRASHTYPE(DOUBLE_FAULT),
188177 };
189178 
190179 
....@@ -347,9 +336,9 @@
347336 	if (buf == NULL)
348337 		return -ENOMEM;
349338 
350
-	n = snprintf(buf, PAGE_SIZE, "Available crash types:\n");
339
+	n = scnprintf(buf, PAGE_SIZE, "Available crash types:\n");
351340 	for (i = 0; i < ARRAY_SIZE(crashtypes); i++) {
352
-		n += snprintf(buf + n, PAGE_SIZE - n, "%s\n",
341
+		n += scnprintf(buf + n, PAGE_SIZE - n, "%s\n",
353342 			      crashtypes[i].name);
354343 	}
355344 	buf[n] = '\0';
....@@ -407,7 +396,7 @@
407396 {
408397 	struct crashpoint *crashpoint = NULL;
409398 	const struct crashtype *crashtype = NULL;
410
-	int ret = -EINVAL;
399
+	int ret;
411400 	int i;
412401 
413402 	/* Neither or both of these need to be set */
....@@ -446,25 +435,17 @@
446435 	lkdtm_bugs_init(&recur_count);
447436 	lkdtm_perms_init();
448437 	lkdtm_usercopy_init();
438
+	lkdtm_heap_init();
449439 
450440 	/* Register debugfs interface */
451441 	lkdtm_debugfs_root = debugfs_create_dir("provoke-crash", NULL);
452
-	if (!lkdtm_debugfs_root) {
453
-		pr_err("creating root dir failed\n");
454
-		return -ENODEV;
455
-	}
456442 
457443 	/* Install debugfs trigger files. */
458444 	for (i = 0; i < ARRAY_SIZE(crashpoints); i++) {
459445 		struct crashpoint *cur = &crashpoints[i];
460
-		struct dentry *de;
461446 
462
-		de = debugfs_create_file(cur->name, 0644, lkdtm_debugfs_root,
463
-					 cur, &cur->fops);
464
-		if (de == NULL) {
465
-			pr_err("could not create crashpoint %s\n", cur->name);
466
-			goto out_err;
467
-		}
447
+		debugfs_create_file(cur->name, 0644, lkdtm_debugfs_root, cur,
448
+				    &cur->fops);
468449 	}
469450 
470451 	/* Install crashpoint if one was selected. */
....@@ -492,6 +473,7 @@
492473 	debugfs_remove_recursive(lkdtm_debugfs_root);
493474 
494475 	/* Handle test-specific clean-up. */
476
+	lkdtm_heap_exit();
495477 	lkdtm_usercopy_exit();
496478 
497479 	if (lkdtm_kprobe != NULL)