linux-kernel - Re: [V4 PATCH 3/4] kexec: Fix race between panic() and crash

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <201509281254.KxcIfuxt%fengguang.wu@intel.com>
Date:	Mon, 28 Sep 2015 12:02:16 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>
Cc:	kbuild-all@...org, Jonathan Corbet <corbet@....net>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Vivek Goyal <vgoyal@...hat.com>, linux-doc@...r.kernel.org,
	x86@...nel.org, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org, Michal Hocko <mhocko@...nel.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Subject: Re: [V4 PATCH 3/4] kexec: Fix race between panic() and crash_kexec()
 called directly

Hi Hidehiro,

[auto build test results on v4.3-rc2 -- if it's inappropriate base, please ignore]

config: x86_64-allnoconfig (attached as .config)
reproduce:
  git checkout 0077681103150af584e5e592c0238fd010654c26
  # save the attached .config to linux build tree
  make ARCH=x86_64 

All error/warnings (new ones prefixed by >>):

   kernel/panic.c: In function 'panic':
>> kernel/panic.c:140:3: error: implicit declaration of function '__crash_kexec' [-Werror=implicit-function-declaration]
      __crash_kexec(NULL);
      ^
   cc1: some warnings being treated as errors

vim +/__crash_kexec +140 kernel/panic.c

   134		 * If we have crashed and we have a crash kernel loaded let it handle
   135		 * everything else.
   136		 * If we want to run this after calling panic_notifiers, pass
   137		 * the "crash_kexec_post_notifiers" option to the kernel.
   138		 */
   139		if (!crash_kexec_post_notifiers)
 > 140			__crash_kexec(NULL);
   141	
   142		/*
   143		 * Note smp_send_stop is the usual smp shutdown function, which

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Download attachment ".config.gz" of type "application/octet-stream" (6030 bytes)