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Date: Sat, 27 Jun 2015 06:08:16 +0800
From: kernel test robot <fengguang.wu@...el.com>
To: Andy Lutomirski <luto@...nel.org>
Cc: LKP <lkp@...org>, linux-kernel@...r.kernel.org,
fengguang.wu@...el.com
Subject: [x86/entry/32] WARNING: CPU: 1 PID: 1 at
kernel/locking/lockdep.c:2595 trace_hardirqs_on_caller()
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
git://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/entry
commit bf19026dab994e989bb4fa3250bc11c69c02cf66
Author: Andy Lutomirski <luto@...nel.org>
AuthorDate: Wed Jun 17 11:05:08 2015 -0700
Commit: Andy Lutomirski <luto@...nel.org>
CommitDate: Thu Jun 25 16:50:54 2015 -0700
x86/entry/32: Use prepare_exit_to_usermode and syscall_return_slowpath
This removes the hybrid asm-and-C implementation of exit work.
Signed-off-by: Andy Lutomirski <luto@...nel.org>
+-----------------------------------------------------------------+------------+------------+------------+
| | 0f3966052a | bf19026dab | aebfa2900e |
+-----------------------------------------------------------------+------------+------------+------------+
| boot_successes | 205 | 27 | 15 |
| boot_failures | 0 | 48 | 9 |
| WARNING:at_kernel/locking/lockdep.c:#trace_hardirqs_on_caller() | 0 | 47 | 8 |
| Kernel_panic-not_syncing:hung_task:blocked_tasks | 0 | 5 | |
| backtrace:watchdog | 0 | 5 | |
| INFO:rcu_sched_detected_stalls_on_CPUs/tasks | 0 | 1 | 1 |
| BUG:kernel_test_hang | 0 | 1 | 1 |
+-----------------------------------------------------------------+------------+------------+------------+
[ 10.362331] Key type encrypted registered
[ 10.370264] debug: unmapping init [mem 0x857c1000-0x85837fff]
[ 10.374694] ------------[ cut here ]------------
[ 10.375581] WARNING: CPU: 1 PID: 1 at kernel/locking/lockdep.c:2595 trace_hardirqs_on_caller+0x186/0x1e0()
[ 10.387711] DEBUG_LOCKS_WARN_ON(!irqs_disabled())
[ 10.388651] Modules linked in:
[ 10.389353] CPU: 1 PID: 1 Comm: init Not tainted 4.1.0-01352-gbf19026d #1
[ 10.390731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 10.392739] 00000001 00000000 8002bf30 854753a5 8002bf74 8002bf64 84e4dba1 85679031
[ 10.394477] 8002bf90 00000001 8567f328 00000a23 84e91036 00000a23 84e91036 8547c87c
[ 10.396152] 7fb88c34 00000000 8002bf7c 84e4dbfe 00000009 8002bf74 85679031 8002bf90
[ 10.407943] Call Trace:
[ 10.408540] [<854753a5>] dump_stack+0x48/0x60
[ 10.409506] [<84e4dba1>] warn_slowpath_common+0x81/0xb0
[ 10.410678] [<84e91036>] ? trace_hardirqs_on_caller+0x186/0x1e0
[ 10.411813] [<84e91036>] ? trace_hardirqs_on_caller+0x186/0x1e0
[ 10.412939] [<8547c87c>] ? syscall_exit_work_irqs_off+0xc/0xc
[ 10.414050] [<84e4dbfe>] warn_slowpath_fmt+0x2e/0x30
[ 10.415019] [<84e91036>] trace_hardirqs_on_caller+0x186/0x1e0
[ 10.416119] [<84e00f1c>] trace_hardirqs_on_thunk+0xc/0x10
[ 10.428251] [<8547c87c>] ? syscall_exit_work_irqs_off+0xc/0xc
[ 10.429386] ---[ end trace 8b4643c7f32f991f ]---
[ 10.525863] random: init urandom read with 0 bits of entropy available
git bisect start aebfa2900e002d691e374547851fb4b4efe5044f b953c0d234bc72e8489d3bf51a276c5c4ec85345 --
git bisect good 210173ee66b64571d18b4c3f63a07cb749a441ef # 01:05 41+ 0 Merge 'nfs/linux-next' into devel-spot-201506261748
git bisect bad 8707fe0c18ff95fc5f5ba07ee89fdac647bf08f8 # 01:12 0- 13 Merge 'iommu/master' into devel-spot-201506261748
git bisect bad e8aebcb0d1ea51f93fef6e58ada8d5aeedf5b486 # 01:31 1- 21 Merge 'mtd/next' into devel-spot-201506261748
git bisect bad 2d8c0e0bafd5f7e004a0a7268b75259698934450 # 01:50 9- 2 Merge 'luto/x86/entry' into devel-spot-201506261748
git bisect good 869c9ea8ffbee3e527ef18eb78b11daef4864251 # 02:08 65+ 0 Merge 'perf/tmp.perf/pt' into devel-spot-201506261748
git bisect good c084862c95f2e107db831fe5770faabd6cd759ea # 02:20 66+ 0 x86/asm/entry/64: Migrate error and interrupt exit work to C
git bisect good 369165749af20ab55b3991bbe4500403eb5cb938 # 02:39 71+ 0 x86/entry/64/compat: Remove PTREGSCALL stubs
git bisect good 5c21c7dda6541ccf3ad810f17beff6a6326983c1 # 02:51 71+ 0 [TEMPORARY] x86/entry/32: Sanity check for work_notifysig
git bisect good 0f3966052a62463bb8f68c500a2cc45ae4a837c0 # 03:04 67+ 0 x86/vm86: Teach handle_vm86_trap to return to 32bit mode directly
git bisect bad bf19026dab994e989bb4fa3250bc11c69c02cf66 # 03:40 0- 2 x86/entry/32: Use prepare_exit_to_usermode and syscall_return_slowpath
# first bad commit: [bf19026dab994e989bb4fa3250bc11c69c02cf66] x86/entry/32: Use prepare_exit_to_usermode and syscall_return_slowpath
git bisect good 0f3966052a62463bb8f68c500a2cc45ae4a837c0 # 03:43 196+ 0 x86/vm86: Teach handle_vm86_trap to return to 32bit mode directly
# extra tests with DEBUG_INFO
git bisect bad bf19026dab994e989bb4fa3250bc11c69c02cf66 # 04:43 0- 17 x86/entry/32: Use prepare_exit_to_usermode and syscall_return_slowpath
# extra tests on HEAD of linux-devel/devel-spot-201506261748
git bisect bad aebfa2900e002d691e374547851fb4b4efe5044f # 04:44 0- 9 0day head guard for 'devel-spot-201506261748'
# extra tests on tree/branch luto/x86/entry
git bisect bad d5a2db8b9358cfeb7e0688ea391185fd2b1cdc05 # 05:42 0- 112 x86/entry: Remove do_notify_resume, syscall_trace_leave, and their TIF masks
# extra tests with first bad commit reverted
# extra tests on tree/branch linus/master
git bisect good e382608254e06c8109f40044f5e693f2e04f3899 # 05:57 205+ 0 Merge tag 'trace-v4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
# extra tests on tree/branch next/master
git bisect good 043831b4a4e9a981c4ec6331b6d64b9f62285d5d # 06:07 205+ 0 Add linux-next specific files for 20150626
This script may reproduce the error.
----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
initrd=quantal-core-i386.cgz
wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd
kvm=(
qemu-system-x86_64
-enable-kvm
-cpu kvm64
-kernel $kernel
-initrd $initrd
-m 300
-smp 2
-device e1000,netdev=net0
-netdev user,id=net0
-boot order=nc
-no-reboot
-watchdog i6300esb
-rtc base=localtime
-serial stdio
-display none
-monitor null
)
append=(
hung_task_panic=1
earlyprintk=ttyS0,115200
systemd.log_level=err
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
drbd.minor_count=8
)
"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
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