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Message-ID: <20171009155536.nunzqpzfb5jcbaqd@wfg-t540p.sh.intel.com>
Date: Mon, 9 Oct 2017 23:55:36 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: wfg@...ux.intel.com, LKML <linux-kernel@...r.kernel.org>,
Ingo Molnar <mingo@...nel.org>, LKP <lkp@...org>
Subject: [locking] 892ad5acca [ 12.849409] WARNING: bad unlock balance
detected!
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 892ad5acca0b2ddb514fae63fa4686bf726d2471
Merge: 162b246eb420d 5d6dec6fba38c
Author: Linus Torvalds <torvalds@...ux-foundation.org>
AuthorDate: Mon Jul 3 12:14:18 2017 -0700
Commit: Linus Torvalds <torvalds@...ux-foundation.org>
CommitDate: Mon Jul 3 12:14:18 2017 -0700
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
"The main changes in this cycle were:
- Add CONFIG_REFCOUNT_FULL=y to allow the disabling of the 'full'
(robustness checked) refcount_t implementation with slightly lower
runtime overhead. (Kees Cook)
The lighter weight variant is the default. The two variants use the
same API. Having this variant was a precondition by some
maintainers to merge refcount_t cleanups.
- Add lockdep support for rtmutexes (Peter Zijlstra)
- liblockdep fixes and improvements (Sasha Levin, Ben Hutchings)
- ... misc fixes and improvements"
* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
locking/refcount: Remove the half-implemented refcount_sub() API
locking/refcount: Create unchecked atomic_t implementation
locking/rtmutex: Don't initialize lockdep when not required
locking/selftest: Add RT-mutex support
locking/selftest: Remove the bad unlock ordering test
rt_mutex: Add lockdep annotations
MAINTAINERS: Claim atomic*_t maintainership
locking/x86: Remove the unused atomic_inc_short() methd
tools/lib/lockdep: Remove private kernel headers
tools/lib/lockdep: Hide liblockdep output from test results
tools/lib/lockdep: Add dummy current_gfp_context()
tools/include: Add IS_ERR_OR_NULL to err.h
tools/lib/lockdep: Add empty __is_[module,kernel]_percpu_address
tools/lib/lockdep: Include err.h
tools/include: Add (mostly) empty include/linux/sched/mm.h
tools/lib/lockdep: Use LDFLAGS
tools/lib/lockdep: Remove double-quotes from soname
tools/lib/lockdep: Fix object file paths used in an out-of-tree build
tools/lib/lockdep: Fix compilation for 4.11
tools/lib/lockdep: Don't mix fd-based and stream IO
...
162b246eb4 Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
5d6dec6fba locking/refcount: Remove the half-implemented refcount_sub() API
892ad5acca Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
7a92616c0b Merge tag 'pm-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
1418b85217 Add linux-next specific files for 20170929
+------------------------------------------------+------------+------------+------------+------------+---------------+
| | 162b246eb4 | 5d6dec6fba | 892ad5acca | 7a92616c0b | next-20170929 |
+------------------------------------------------+------------+------------+------------+------------+---------------+
| boot_successes | 47 | 47 | 0 | 4 | 16 |
| boot_failures | 0 | 0 | 16 | 19 | |
| WARNING:bad_unlock_balance_detected | 0 | 0 | 16 | 19 | |
| is_trying_to_release_lock(rcu_preempt_state)at | 0 | 0 | 16 | 19 | |
+------------------------------------------------+------------+------------+------------+------------+---------------+
This also occurs in 4.14-rc4.
[ 2.007473] Duration of test: 371853014 ns
[ 2.007970] Average test time: 370129908
[ 2.008369] Testing concurrent rhashtable access from 10 threads
[ 12.847998]
[ 12.848626] =====================================
[ 12.849409] WARNING: bad unlock balance detected!
[ 12.850157] 4.12.0-00420-g892ad5a #1 Not tainted
[ 12.850870] -------------------------------------
[ 12.851574] rhashtable_thra/109 is trying to release lock (rcu_preempt_state) at:
[ 12.852701] [<ffffffff811087c8>] rcu_read_unlock_special+0x3de/0x4a7
[ 12.853707] but there are no more locks to release!
[ 12.854505]
[ 12.854505] other info that might help us debug this:
[ 12.855522] 1 lock held by rhashtable_thra/109:
[ 12.856206] #0: (rcu_read_lock){......}, at: [<ffffffff812d263e>] thread_lookup_test+0x27/0x50b
[ 12.857530]
[ 12.857530] stack backtrace:
[ 12.858221] CPU: 0 PID: 109 Comm: rhashtable_thra Not tainted 4.12.0-00420-g892ad5a #1
[ 12.859494] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 12.860783] Call Trace:
[ 12.861164] dump_stack+0xf1/0x162
[ 12.861684] ? rcu_read_unlock_special+0x3de/0x4a7
[ 12.862411] print_unlock_imbalance_bug+0x15c/0x16c
[ 12.863142] lock_release+0x22c/0x304
[ 12.863706] rt_mutex_unlock+0x34/0xed
[ 12.864288] ? trace_hardirqs_on+0x1b/0x24
[ 12.864927] rcu_read_unlock_special+0x3de/0x4a7
[ 12.865660] __rcu_read_unlock+0x62/0x9f
[ 12.866262] thread_lookup_test+0x400/0x50b
[ 12.866911] threadfunc+0x84f/0x8e0
[ 12.867474] ? insert_retry+0x762/0x762
[ 12.868406] kthread+0x183/0x192
[ 12.868934] ? kthread_stop+0xb7/0xb7
[ 12.869523] ret_from_fork+0x2a/0x40
[ 13.780976] rhashtable_thra (111) used greatest stack depth: 14152 bytes left
[ 13.782110] Started 10 threads, 0 failed
[ 13.840515] rcu-perf: rcu_perf_writer 0 has 100 measurements
[ 13.851933] rcu-perf: Test complete
[ 13.852512] rcu-perf:!!! All grace periods expedited, no normal ones to measure!
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start v4.13 v4.12 --
git bisect bad 63a86362130f4c17eaa57f3ef5171ec43111a54e # 03:23 B 0 11 24 0 Merge tag 'pm-4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
git bisect bad 090a81d8766e21d33ab3e4d24e6c8e5eedf086dd # 03:33 B 3 3 0 0 Merge branch 'for-spi' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
git bisect bad 3bad2f1c676581d01e7645eb03e9b27e28b0a92e # 03:57 B 0 13 26 0 Merge branch 'work.misc-set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
git bisect bad 362f6729cbb1d6bbab59e069f19441b0622ff7ec # 05:02 B 8 8 0 0 Merge tag 'usb-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
git bisect bad 6553698be05983056f5561cef6aaee0cc6afe7a0 # 05:25 B 3 5 0 0 Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad 892ad5acca0b2ddb514fae63fa4686bf726d2471 # 05:37 B 0 5 18 0 Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 26d3a77d2cb3cb31bbaa2de37b7a4e6375f204ee # 05:54 G 16 0 0 0 Merge tag 'edac_for_4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp
git bisect good 330e9e46253cbfab178450c976aa90ef0f3ae940 # 06:17 G 16 0 0 0 Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 162b246eb420d2ca2002a50917c897b10c9aba09 # 06:36 G 15 0 0 0 Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 12d83f7361724e5aa4299bb28e4caadc62ae482b # 06:52 G 16 0 0 0 tools/include: Add (mostly) empty include/linux/sched/mm.h
git bisect good 3942b77121986519ee52ab4dd4ae8f4383dfe765 # 07:07 G 16 0 0 0 MAINTAINERS: Claim atomic*_t maintainership
git bisect good cde50a67397c0da7d11795d4b4418384022ab8e6 # 07:19 G 16 0 0 0 locking/rtmutex: Don't initialize lockdep when not required
git bisect good fd25d19f6b8da315332bb75936605fb45d3ea981 # 07:46 G 16 0 0 0 locking/refcount: Create unchecked atomic_t implementation
git bisect good 5d6dec6fba38c3e2d408df108bb92ef4ac201f18 # 08:09 G 15 0 0 0 locking/refcount: Remove the half-implemented refcount_sub() API
# first bad commit: [892ad5acca0b2ddb514fae63fa4686bf726d2471] Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 162b246eb420d2ca2002a50917c897b10c9aba09 # 08:20 G 45 0 0 0 Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 5d6dec6fba38c3e2d408df108bb92ef4ac201f18 # 08:28 G 47 0 0 0 locking/refcount: Remove the half-implemented refcount_sub() API
# extra tests with CONFIG_DEBUG_INFO_REDUCED
git bisect bad 892ad5acca0b2ddb514fae63fa4686bf726d2471 # 08:47 B 4 12 0 0 Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
# extra tests on HEAD of linux-devel/devel-hourly-2017100521
git bisect bad 9b1f2a653b3fc84460a80e11559196321717bd91 # 08:47 B 0 49 65 0 0day head guard for 'devel-hourly-2017100521'
# extra tests on tree/branch linus/master
git bisect bad 7a92616c0bac849e790283723b36c399668a1d9f # 08:59 B 0 4 17 0 Merge tag 'pm-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
# extra tests on tree/branch linux-next/master
git bisect good 1418b852174ad50b3cb4738b8801626aefdc0bd9 # 09:15 G 16 0 0 0 Add linux-next specific files for 20170929
---
0-DAY kernel test infrastructure Open Source Technology Center
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