From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751586AbdB0VBJ (ORCPT ); Mon, 27 Feb 2017 16:01:09 -0500 Received: from bh-25.webhostbox.net ([208.91.199.152]:52319 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751338AbdB0VBH (ORCPT ); Mon, 27 Feb 2017 16:01:07 -0500 Date: Mon, 27 Feb 2017 12:59:23 -0800 From: Guenter Roeck To: Josh Poimboeuf Cc: Peter Zijlstra , Ingo Molnar , linux-kernel@vger.kernel.org Subject: Crash in -next due to 'objtool: Improve detection of BUG() and other dead ends' Message-ID: <20170227205923.GA6466@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.24 (2015-08-30) X-Authenticated_sender: guenter@roeck-us.net X-OutGoing-Spam-Status: No, score=-1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: authenticated_id: guenter@roeck-us.net X-Authenticated-Sender: bh-25.webhostbox.net: guenter@roeck-us.net X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, my qemu tests for mips64 in -next fail as follows. ... VFS: Mounted root (ext3 filesystem) on device 8:0. Freeing unused kernel memory: 304K This architecture does not have kernel memory protection. Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000a ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000a There is no symbol traceback, and I don't see any other (obvious) error message. bisect points to commit 'objtool: Improve detection of BUG() and other dead ends'; reverting that patch fixes the problem. Bisect log is attached below. The script used to run the test as well as the root file system is available at https://github.com/groeck/linux-build-test/tree/master/rootfs/mips64 A complete log is available at http://kerneltests.org/builders/qemu-mips64-next/builds/592/steps/qemubuildcommand/logs/stdio Guenter --- # bad: [ed7b11e565c736828f0b793f596a4ca20efee747] Add linux-next specific files for 20170227 # good: [c470abd4fde40ea6a0846a2beab642a578c0b8cd] Linux 4.10 git bisect start 'HEAD' 'v4.10' # good: [caa59428971d5ad81d19512365c9ba580d83268c] Merge tag 'staging-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging git bisect good caa59428971d5ad81d19512365c9ba580d83268c # good: [d5500a074741b78b7f778b4ab3415d5ecdcda0a7] Merge tag 'usercopy-v4.11-rc1.fix' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux git bisect good d5500a074741b78b7f778b4ab3415d5ecdcda0a7 # good: [5d8a00eee2ed2e548a5d21b0edf495f3f7bf8bb4] Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux git bisect good 5d8a00eee2ed2e548a5d21b0edf495f3f7bf8bb4 # good: [017bfb6c372fa793cdb09828597a464fa24e0ea7] Merge remote-tracking branch 'jfs/jfs-next' git bisect good 017bfb6c372fa793cdb09828597a464fa24e0ea7 # bad: [e2a95a3fe9e9586df29e8d673dc8cdd36ed6158b] Merge remote-tracking branch 'edac/linux_next' git bisect bad e2a95a3fe9e9586df29e8d673dc8cdd36ed6158b # good: [736e441efdafdbf0bb32732d87e00b8ba7f75260] Merge remote-tracking branch 'thermal/next' git bisect good 736e441efdafdbf0bb32732d87e00b8ba7f75260 # good: [5bd695c24b294b482d86d352a4a0c7ba2059dcff] Merge remote-tracking branch 'block/for-next' git bisect good 5bd695c24b294b482d86d352a4a0c7ba2059dcff # good: [690962e72babac64c8240071e106d2c3e8d08306] Merge remote-tracking branch 'spi/for-next' git bisect good 690962e72babac64c8240071e106d2c3e8d08306 # bad: [462a53b1a2f984a8c8c0aade1c461ce9ea156d5b] Merge branch 'perf/urgent' git bisect bad 462a53b1a2f984a8c8c0aade1c461ce9ea156d5b # good: [bb963e16507ca7670f0bb47ccaada8874b2ba6a1] perf utils: Check verbose flag properly git bisect good bb963e16507ca7670f0bb47ccaada8874b2ba6a1 # good: [7bbba0eb1af34694868d028b80475981f90e6bee] perf/core: Fix perf_event_enable_on_exec() timekeeping (again) git bisect good 7bbba0eb1af34694868d028b80475981f90e6bee # bad: [1db159781cc7df093085ccaddc022beaaa9dd990] Merge branch 'core/urgent' git bisect bad 1db159781cc7df093085ccaddc022beaaa9dd990 # bad: [d1091c7fa3d52ebce4dd3f15d04155b3469b2f90] objtool: Improve detection of BUG() and other dead ends git bisect bad d1091c7fa3d52ebce4dd3f15d04155b3469b2f90 # good: [9f0c18aec620bc9d82268b3cb937568dd07b43ff] objtool: Fix CONFIG_STACK_VALIDATION=y warning for out-of-tree modules git bisect good 9f0c18aec620bc9d82268b3cb937568dd07b43ff # first bad commit: [d1091c7fa3d52ebce4dd3f15d04155b3469b2f90] objtool: Improve detection of BUG() and other dead ends