1 files changed, 0 insertions, 82 deletions
diff --git a/drivers/misc/lkdtm/stackleak.c b/drivers/misc/lkdtm/stackleak.c
deleted file mode 100644
index 00db21ff115e..000000000000
--- a/drivers/misc/lkdtm/stackleak.c
+++ /dev/null
@@ -1,82 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * This code tests that the current task stack is properly erased (filled
- * with STACKLEAK_POISON).
- *
- * Authors:
- *   Alexander Popov <alex.popov@linux.com>
- *   Tycho Andersen <tycho@tycho.ws>
- */
-
-#include "lkdtm.h"
-#include <linux/stackleak.h>
-
-void lkdtm_STACKLEAK_ERASING(void)
-{
-	unsigned long *sp, left, found, i;
-	const unsigned long check_depth =
-			STACKLEAK_SEARCH_DEPTH / sizeof(unsigned long);
-	bool test_failed = false;
-
-	/*
-	 * For the details about the alignment of the poison values, see
-	 * the comment in stackleak_track_stack().
-	 */
-	sp = PTR_ALIGN(&i, sizeof(unsigned long));
-
-	left = ((unsigned long)sp & (THREAD_SIZE - 1)) / sizeof(unsigned long);
-	sp--;
-
-	/*
-	 * One 'long int' at the bottom of the thread stack is reserved
-	 * and not poisoned.
-	 */
-	if (left > 1) {
-		left--;
-	} else {
-		pr_err("FAIL: not enough stack space for the test\n");
-		test_failed = true;
-		goto end;
-	}
-
-	pr_info("checking unused part of the thread stack (%lu bytes)...\n",
-					left * sizeof(unsigned long));
-
-	/*
-	 * Search for 'check_depth' poison values in a row (just like
-	 * stackleak_erase() does).
-	 */
-	for (i = 0, found = 0; i < left && found <= check_depth; i++) {
-		if (*(sp - i) == STACKLEAK_POISON)
-			found++;
-		else
-			found = 0;
-	}
-
-	if (found <= check_depth) {
-		pr_err("FAIL: the erased part is not found (checked %lu bytes)\n",
-						i * sizeof(unsigned long));
-		test_failed = true;
-		goto end;
-	}
-
-	pr_info("the erased part begins after %lu not poisoned bytes\n",
-				(i - found) * sizeof(unsigned long));
-
-	/* The rest of thread stack should be erased */
-	for (; i < left; i++) {
-		if (*(sp - i) != STACKLEAK_POISON) {
-			pr_err("FAIL: bad value number %lu in the erased part: 0x%lx\n",
-								i, *(sp - i));
-			test_failed = true;
-		}
-	}
-
-end:
-	if (test_failed) {
-		pr_err("FAIL: the thread stack is NOT properly erased!\n");
-		pr_expected_config(CONFIG_GCC_PLUGIN_STACKLEAK);
-	} else {
-		pr_info("OK: the rest of the thread stack is properly erased\n");
-	}
-}