From: Andrey Ryabinin <aryabinin@virtuozzo.com>
To: Fengguang Wu <fengguang.wu@intel.com>,
Alexander Potapenko <glider@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>,
<kasan-dev@googlegroups.com>, <linux-kernel@vger.kernel.org>,
LKP <lkp@01.org>, Dmitry Vyukov <dvyukov@google.com>
Subject: Re: [mm/kasan] 80a9201a59 BUG: kernel reboot-without-warning in early-boot stage, last printk: Booting the kernel.
Date: Mon, 13 Mar 2017 17:25:04 +0300 [thread overview]
Message-ID: <5211ff97-29ab-c3b5-670b-db98662ce009@virtuozzo.com> (raw)
In-Reply-To: <20170228031227.tm7flsxl7t7klspf@wfg-t540p.sh.intel.com>
On 02/28/2017 06:12 AM, Fengguang Wu wrote:
> Hi Alexander,
>
> FYI, we find an old bug that's still alive in linux-next. The attached
> reproduce-* script may help debug the problem.
>
...
> +--------------------------------------------------------------------------------------+------------+------------+
> | | c146a2b98e | 80a9201a59 |
> +--------------------------------------------------------------------------------------+------------+------------+
> | boot_successes | 740 | 48 |
> | boot_failures | 0 | 142 |
> | BUG:kernel_reboot-without-warning_in_early-boot_stage,last_printk:Booting_the_kernel | 0 | 131 |
> | BUG:kernel_in_stage | 0 | 11 |
> +--------------------------------------------------------------------------------------+------------+------------+
>
Indeed it is an old bug, I'll send a fix shortly. But the bisection result is not correct. This bug is actually much older.
Note that commit 80a9201a596 changes Kconfig dependency - it removes depends on SLUB_DEBUG from config KASAN section.
And yours config has:
# CONFIG_SLUB_DEBUG is not set
So you simply test c146a2b98e with CONFIG_KASAN=n and 80a9201a59 with CONFIG_KASAN=y
next prev parent reply other threads:[~2017-03-13 14:24 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-28 3:12 Fengguang Wu
2017-02-28 9:06 ` Dmitry Vyukov
2017-03-11 13:54 ` [mm/kasan] BUG: KASAN: slab-out-of-bounds in inotify_read at addr ffff88001539780c Fengguang Wu
2017-03-13 14:51 ` Andrey Ryabinin
2017-03-13 14:25 ` Andrey Ryabinin [this message]
2017-03-13 16:33 ` [PATCH] x86/kasan: Fix boot with KASAN=y and PROFILE_ANNOTATED_BRANCHES=y Andrey Ryabinin
2017-03-13 23:03 ` [tip:x86/urgent] " tip-bot for Andrey Ryabinin
2017-03-14 14:09 ` Alexander Potapenko
2017-03-14 14:59 ` Andrey Ryabinin
2017-03-14 15:01 ` Andrey Ryabinin
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