kcsan: Show message if enabled early (27787930) · Commits · 戴 / test

kernel/kcsan/core.c

+6 −2

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0

		#define pr_fmt(fmt) "kcsan: " fmt

		#include <linux/atomic.h>
		#include <linux/bug.h>
		#include <linux/delay.h>
		@@ -463,7 +465,7 @@ kcsan_setup_watchpoint(const volatile void *ptr, size_t size, int type)

		if (IS_ENABLED(CONFIG_KCSAN_DEBUG)) {
		kcsan_disable_current();
		pr_err("KCSAN: watching %s, size: %zu, addr: %px [slot: %d, encoded: %lx]\n",
		pr_err("watching %s, size: %zu, addr: %px [slot: %d, encoded: %lx]\n",
		is_write ? "write" : "read", size, ptr,
		watchpoint_slot((unsigned long)ptr),
		encode_watchpoint((unsigned long)ptr, size, is_write));
		@@ -623,9 +625,11 @@ void __init kcsan_init(void)
		* We are in the init task, and no other tasks should be running;
		* WRITE_ONCE without memory barrier is sufficient.
		*/
		if (kcsan_early_enable)
		if (kcsan_early_enable) {
		pr_info("enabled early\n");
		WRITE_ONCE(kcsan_enabled, true);
		}
		}

		/* === Exported interface =================================================== */