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Date: Mon, 9 Oct 2017 23:24:43 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Emese Revfy <re.emese@...il.com>
Cc: wfg@...ux.intel.com, Michal Marek <mmarek@...e.com>,
linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
kernel-hardening@...ts.openwall.com, LKP <lkp@...org>
Subject: [sancov] 543c37cb16 BUG: kernel reboot-without-warning in boot stage
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 543c37cb165049c3be24a0d4733e67caa2b33eef
Author: Emese Revfy <re.emese@...il.com>
AuthorDate: Tue May 24 00:11:37 2016 +0200
Commit: Michal Marek <mmarek@...e.com>
CommitDate: Tue Jun 7 22:57:10 2016 +0200
Add sancov plugin
The sancov gcc plugin inserts a __sanitizer_cov_trace_pc() call
at the start of basic blocks.
This plugin is a helper plugin for the kcov feature. It supports
all gcc versions with plugin support (from gcc-4.5 on).
It is based on the gcc commit "Add fuzzing coverage support" by Dmitry Vyukov
(https://gcc.gnu.org/viewcvs/gcc?limit_changes=0&view=revision&revision=231296).
Signed-off-by: Emese Revfy <re.emese@...il.com>
Acked-by: Kees Cook <keescook@...omium.org>
Signed-off-by: Michal Marek <mmarek@...e.com>
0dae776c6b Add Cyclomatic complexity GCC plugin
543c37cb16 Add sancov plugin
42b76d0e6b Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
1418b85217 Add linux-next specific files for 20170929
+-------------------------------------------------+------------+------------+------------+---------------+
| | 0dae776c6b | 543c37cb16 | 42b76d0e6b | next-20170929 |
+-------------------------------------------------+------------+------------+------------+---------------+
| boot_successes | 31 | 0 | 0 | 0 |
| boot_failures | 0 | 11 | 11 | 13 |
| BUG:kernel_reboot-without-warning_in_boot_stage | 0 | 11 | 11 | 13 |
+-------------------------------------------------+------------+------------+------------+---------------+
[ 0.000000] percpu: Embedded 30 pages/cpu @ffff88001fa00000 s93504 r0 d29376 u2097152
[ 0.000000] pcpu-alloc: s93504 r0 d29376 u2097152 alloc=1*2097152
[ 0.000000] pcpu-alloc: [0] 0
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start v4.8 v4.7 --
git bisect bad e6e7214fbbdab1f90254af68e0927bdb24708d22 # 18:02 B 0 8 20 0 Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good ba929b6646c5b87c7bb15cd8d3e51617725c983b # 19:41 G 10 0 0 0 Merge branch 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
git bisect bad f72035fad84c9b51a45fd8afc8024f3df0ba8848 # 19:52 B 0 4 16 0 Merge tag 'usb-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
git bisect bad c7fac299672ee98a1da90ea2e473180fc75d2c53 # 20:10 B 0 3 15 0 Merge tag 'drm-psr-fixes-for-v4.8' of git://people.freedesktop.org/~airlied/linux
git bisect good 3fbff9c874072a085c08af706beb88e7797d78b4 # 13:37 G 10 0 0 0 Merge tag 'armsoc-arm64' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
git bisect good 731c7d3a205ba89b475b2aa71b5f13dd6ae3de56 # 09:54 G 11 0 0 0 Merge tag 'drm-for-v4.8' of git://people.freedesktop.org/~airlied/linux
git bisect bad f716a85cd6045c994011268223706642cff7e485 # 10:18 B 0 2 15 0 Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
git bisect good f7b32e4c021fd788f13f6785e17efbc3eb05b351 # 10:41 G 11 0 0 0 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
git bisect good 221bb8a46e230b9824204ae86537183d9991ff2a # 10:58 G 11 0 0 0 Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
git bisect bad 5ee02af153661ed98b5ccdfb984d78e7a8881b56 # 11:19 B 0 4 16 0 vmlinux.lds.h: replace config_enabled() with IS_ENABLED()
git bisect bad 78283edf2c01c38eb840a3de5ffd18fe2992ab64 # 11:42 B 0 1 13 0 kbuild: setlocalversion: print error to STDERR
git bisect good 6b90bd4ba40b38dc13c2782469c1c77e4ed79915 # 12:06 G 10 0 0 0 GCC plugin infrastructure
git bisect bad 543c37cb165049c3be24a0d4733e67caa2b33eef # 12:25 B 0 11 23 0 Add sancov plugin
git bisect good 0dae776c6bf31e779c172753f6e2d6426eb42523 # 12:59 G 11 0 0 0 Add Cyclomatic complexity GCC plugin
# first bad commit: [543c37cb165049c3be24a0d4733e67caa2b33eef] Add sancov plugin
git bisect good 0dae776c6bf31e779c172753f6e2d6426eb42523 # 13:34 G 31 0 0 0 Add Cyclomatic complexity GCC plugin
# extra tests with CONFIG_DEBUG_INFO_REDUCED
git bisect bad 543c37cb165049c3be24a0d4733e67caa2b33eef # 13:52 B 0 9 21 0 Add sancov plugin
# extra tests on HEAD of linux-next/master
git bisect bad 1418b852174ad50b3cb4738b8801626aefdc0bd9 # 13:52 B 0 13 28 0 Add linux-next specific files for 20170929
# extra tests on tree/branch linus/master
git bisect bad 42b76d0e6b1fe0fcb90e0ff6b4d053d50597b031 # 14:01 B 0 11 23 0 Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
# extra tests on tree/branch linux-next/master
git bisect bad 1418b852174ad50b3cb4738b8801626aefdc0bd9 # 14:02 B 0 13 28 0 Add linux-next specific files for 20170929
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
Download attachment "dmesg-yocto-kbuild-19:20171005122314:x86_64-randconfig-g0-09300104:4.7.0-rc1-00004-g543c37c:1.gz" of type "application/gzip" (3094 bytes)
View attachment "reproduce-yocto-kbuild-19:20171005122314:x86_64-randconfig-g0-09300104:4.7.0-rc1-00004-g543c37c:1" of type "text/plain" (759 bytes)
View attachment "config-4.7.0-rc1-00004-g543c37c" of type "text/plain" (96052 bytes)
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