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Date: Tue, 29 May 2018 03:28:37 +0800
From: kernel test robot <lkp@...el.com>
To: Paul Blakey <paulb@...lanox.com>
Cc: LKP <lkp@...org>, linux-kernel@...r.kernel.org
Subject: 499ac3b60f ("test_rhashtable: add test case for rhltable with
.."): WARNING: suspicious RCU usage
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 499ac3b60f657dae82055fc81c7b01e6242ac9bc
Author: Paul Blakey <paulb@...lanox.com>
AuthorDate: Sun Mar 4 17:29:49 2018 +0200
Commit: David S. Miller <davem@...emloft.net>
CommitDate: Wed Mar 7 10:44:03 2018 -0500
test_rhashtable: add test case for rhltable with duplicate objects
Tries to insert duplicates in the middle of bucket's chain:
bucket 1: [[val 21 (tid=1)]] -> [[ val 1 (tid=2), val 1 (tid=0) ]]
Reuses tid to distinguish the elements insertion order.
Signed-off-by: Paul Blakey <paulb@...lanox.com>
Acked-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: David S. Miller <davem@...emloft.net>
d3dcf8eb61 rhashtable: Fix rhlist duplicates insertion
499ac3b60f test_rhashtable: add test case for rhltable with duplicate objects
786b71f5b7 Merge tag 'nds32-for-linus-4.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/greentime/linux
47b9cef067 Merge branch 'akpm/master'
+--------------------------------------------------------------------+------------+------------+------------+------------+
| | d3dcf8eb61 | 499ac3b60f | 786b71f5b7 | 47b9cef067 |
+--------------------------------------------------------------------+------------+------------+------------+------------+
| boot_successes | 64 | 0 | 0 | 0 |
| boot_failures | 0 | 42 | 37 | 15 |
| WARNING:suspicious_RCU_usage | 0 | 42 | 37 | 15 |
| lib/test_rhashtable.c:#suspicious_rcu_dereference_protected()usage | 0 | 42 | 37 | 15 |
| WARNING:at_kernel/kthread.c:#kthread_park | 0 | 0 | 0 | 15 |
| RIP:kthread_park | 0 | 0 | 0 | 15 |
+--------------------------------------------------------------------+------------+------------+------------+------------+
[ 9.686452] test if its possible to exceed max_size 8192: no, ok
[ 9.687647] Average test time: 452222504
[ 9.688324] test inserting duplicates
[ 9.688994]
[ 9.689266] =============================
[ 9.689946] WARNING: suspicious RCU usage
[ 9.690634] 4.16.0-rc4-00130-g499ac3b #1 Not tainted
[ 9.691470] -----------------------------
[ 9.692150] lib/test_rhashtable.c:502 suspicious rcu_dereference_protected() usage!
[ 9.693728]
[ 9.693728] other info that might help us debug this:
[ 9.693728]
[ 9.695055]
[ 9.695055] rcu_scheduler_active = 2, debug_locks = 1
[ 9.696139] no locks held by swapper/1.
[ 9.696799]
[ 9.696799] stack backtrace:
[ 9.697538] CPU: 0 PID: 1 Comm: swapper Not tainted 4.16.0-rc4-00130-g499ac3b #1
[ 9.698766] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 9.700172] Call Trace:
[ 9.700607] ? dump_stack+0x23/0x39
[ 9.701207] ? lockdep_rcu_suspicious+0xfd/0x110
[ 9.701990] ? print_ht+0xa3/0x3c1
[ 9.702574] ? test_insert_dup+0x871/0x955
[ 9.703277] ? my_hashfn+0x30/0x30
[ 9.703871] ? kstrtoul_from_user+0xd0/0xd0
[ 9.704587] ? jhash+0x1c0/0x1c0
[ 9.705144] ? my_hashfn+0x30/0x30
[ 9.705726] ? rhashtable_rehash_alloc+0xf0/0xf0
[ 9.706510] ? test_rht_init+0x3d2/0x7ff
[ 9.707196] ? test_rhashtable+0xab6/0xab6
[ 9.708062] ? do_one_initcall+0x65/0x270
[ 9.708738] ? kernel_init_freeable+0x1d3/0x2c3
[ 9.709508] ? rest_init+0x1d0/0x1d0
[ 9.710137] ? kernel_init+0x12/0x1d0
[ 9.710759] ? ret_from_fork+0x3a/0x50
[ 9.711399]
[ 9.711667] =============================
[ 9.712346] WARNING: suspicious RCU usage
[ 9.713032] 4.16.0-rc4-00130-g499ac3b #1 Not tainted
[ 9.713873] -----------------------------
[ 9.714558] lib/test_rhashtable.c:507 suspicious rcu_dereference_protected() usage!
[ 9.716129]
[ 9.716129] other info that might help us debug this:
[ 9.716129]
[ 9.717461]
[ 9.717461] rcu_scheduler_active = 2, debug_locks = 1
[ 9.718551] no locks held by swapper/1.
[ 9.719206]
[ 9.719206] stack backtrace:
[ 9.719937] CPU: 0 PID: 1 Comm: swapper Not tainted 4.16.0-rc4-00130-g499ac3b #1
[ 9.721178] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 9.722561] Call Trace:
[ 9.722992] ? dump_stack+0x23/0x39
[ 9.723600] ? lockdep_rcu_suspicious+0xfd/0x110
[ 9.724383] ? print_ht+0x11d/0x3c1
[ 9.724981] ? test_insert_dup+0x871/0x955
[ 9.725669] ? my_hashfn+0x30/0x30
[ 9.726252] ? kstrtoul_from_user+0xd0/0xd0
[ 9.726977] ? jhash+0x1c0/0x1c0
[ 9.727527] ? my_hashfn+0x30/0x30
[ 9.728113] ? rhashtable_rehash_alloc+0xf0/0xf0
[ 9.728887] ? test_rht_init+0x3d2/0x7ff
[ 9.729557] ? test_rhashtable+0xab6/0xab6
[ 9.730437] ? do_one_initcall+0x65/0x270
[ 9.731123] ? kernel_init_freeable+0x1d3/0x2c3
[ 9.731881] ? rest_init+0x1d0/0x1d0
[ 9.732492] ? kernel_init+0x12/0x1d0
[ 9.733119] ? ret_from_fork+0x3a/0x50
[ 9.733769]
[ 9.734047] =============================
[ 9.734718] WARNING: suspicious RCU usage
[ 9.735400] 4.16.0-rc4-00130-g499ac3b #1 Not tainted
[ 9.736234] -----------------------------
[ 9.736925] lib/test_rhashtable.c:508 suspicious rcu_dereference_protected() usage!
[ 9.738481]
[ 9.738481] other info that might help us debug this:
[ 9.738481]
[ 9.739797]
[ 9.739797] rcu_scheduler_active = 2, debug_locks = 1
[ 9.740894] no locks held by swapper/1.
[ 9.741552]
[ 9.741552] stack backtrace:
[ 9.742287] CPU: 0 PID: 1 Comm: swapper Not tainted 4.16.0-rc4-00130-g499ac3b #1
[ 9.743526] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 9.744907] Call Trace:
[ 9.745344] ? dump_stack+0x23/0x39
[ 9.745944] ? lockdep_rcu_suspicious+0xfd/0x110
[ 9.746739] ? print_ht+0x195/0x3c1
[ 9.747345] ? test_insert_dup+0x871/0x955
[ 9.748042] ? my_hashfn+0x30/0x30
[ 9.748622] ? kstrtoul_from_user+0xd0/0xd0
[ 9.749333] ? jhash+0x1c0/0x1c0
[ 9.749889] ? my_hashfn+0x30/0x30
[ 9.750494] ? rhashtable_rehash_alloc+0xf0/0xf0
[ 9.751279] ? test_rht_init+0x3d2/0x7ff
[ 9.751948] ? test_rhashtable+0xab6/0xab6
[ 9.752809] ? do_one_initcall+0x65/0x270
[ 9.753510] ? kernel_init_freeable+0x1d3/0x2c3
[ 9.754281] ? rest_init+0x1d0/0x1d0
[ 9.754887] ? kernel_init+0x12/0x1d0
[ 9.755509] ? ret_from_fork+0x3a/0x50
[ 9.756147]
[ 9.756416] =============================
[ 9.757108] WARNING: suspicious RCU usage
[ 9.757782] 4.16.0-rc4-00130-g499ac3b #1 Not tainted
[ 9.758613] -----------------------------
[ 9.759289] lib/test_rhashtable.c:519 suspicious rcu_dereference_protected() usage!
[ 9.760855]
[ 9.760855] other info that might help us debug this:
[ 9.760855]
[ 9.762186]
[ 9.762186] rcu_scheduler_active = 2, debug_locks = 1
[ 9.763272] no locks held by swapper/1.
[ 9.763930]
[ 9.763930] stack backtrace:
[ 9.764669] CPU: 0 PID: 1 Comm: swapper Not tainted 4.16.0-rc4-00130-g499ac3b #1
[ 9.765894] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 9.767288] Call Trace:
[ 9.767718] ? dump_stack+0x23/0x39
[ 9.768320] ? lockdep_rcu_suspicious+0xfd/0x110
[ 9.769103] ? print_ht+0x245/0x3c1
[ 9.769698] ? test_insert_dup+0x871/0x955
[ 9.770409] ? my_hashfn+0x30/0x30
[ 9.771000] ? kstrtoul_from_user+0xd0/0xd0
[ 9.771699] ? jhash+0x1c0/0x1c0
[ 9.772255] ? my_hashfn+0x30/0x30
[ 9.772834] ? rhashtable_rehash_alloc+0xf0/0xf0
[ 9.773633] ? test_rht_init+0x3d2/0x7ff
[ 9.774307] ? test_rhashtable+0xab6/0xab6
[ 9.775170] ? do_one_initcall+0x65/0x270
[ 9.775849] ? kernel_init_freeable+0x1d3/0x2c3
[ 9.776615] ? rest_init+0x1d0/0x1d0
[ 9.777243] ? kernel_init+0x12/0x1d0
[ 9.777864] ? ret_from_fork+0x3a/0x50
[ 9.778508]
[ 9.778776] =============================
[ 9.779457] WARNING: suspicious RCU usage
[ 9.780153] 4.16.0-rc4-00130-g499ac3b #1 Not tainted
[ 9.780984] -----------------------------
[ 9.781652] lib/test_rhashtable.c:529 suspicious rcu_dereference_protected() usage!
[ 9.783211]
[ 9.783211] other info that might help us debug this:
[ 9.783211]
[ 9.784537]
[ 9.784537] rcu_scheduler_active = 2, debug_locks = 1
[ 9.785672] no locks held by swapper/1.
[ 9.786326]
[ 9.786326] stack backtrace:
[ 9.787075] CPU: 0 PID: 1 Comm: swapper Not tainted 4.16.0-rc4-00130-g499ac3b #1
[ 9.788294] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 9.789685] Call Trace:
[ 9.790136] ? dump_stack+0x23/0x39
[ 9.790729] ? lockdep_rcu_suspicious+0xfd/0x110
[ 9.791513] ? print_ht+0x310/0x3c1
[ 9.792117] ? test_insert_dup+0x871/0x955
[ 9.792808] ? my_hashfn+0x30/0x30
[ 9.793423] ? kstrtoul_from_user+0xd0/0xd0
[ 9.794137] ? jhash+0x1c0/0x1c0
[ 9.794686] ? my_hashfn+0x30/0x30
[ 9.795271] ? rhashtable_rehash_alloc+0xf0/0xf0
[ 9.796140] ? test_rht_init+0x3d2/0x7ff
[ 9.796822] ? test_rhashtable+0xab6/0xab6
[ 9.797690] ? do_one_initcall+0x65/0x270
[ 9.798372] ? kernel_init_freeable+0x1d3/0x2c3
[ 9.799135] ? rest_init+0x1d0/0x1d0
[ 9.799740] ? kernel_init+0x12/0x1d0
[ 9.800380] ? ret_from_fork+0x3a/0x50
[ 9.801028]
[ 9.801028] ---- ht: ----
[ 9.801028] bucket[1] -> [[ val 1 (tid=0) ]] -> [[ val 21 (tid=1) ]]
[ 9.801028] -------------
[ 9.806754]
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start v4.16 v4.15 --
git bisect good 1388c80438e69fc01d83fbe98da3cac24c3c8731 # 13:32 G 11 0 0 0 Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 98577c6aa2cddf73d55b6f1e2825a1f333ea1723 # 14:07 G 11 0 0 0 Merge tag 'chrome-platform-4.16-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform
git bisect good efac2483e8f289cd879e750075e63a9d16897e65 # 14:43 G 11 0 0 0 Merge branch 'for-4.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
git bisect bad f1869a890cdedb92a3fab969db5d0fd982850273 # 15:30 B 0 11 27 2 tty: vt: fix up tabstops properly
git bisect bad 9ec7ccc8f4f89843991cf692e89fc1fcbca85c83 # 16:10 B 0 2 16 0 Merge tag 'drm-fixes-for-v4.16-rc7' of git://people.freedesktop.org/~airlied/linux
git bisect good 76c0b6a36a1239494a5ae3c0dc83208a8112c483 # 17:03 G 11 0 0 0 Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
git bisect good 9ce207880d8e4b20b6c1bcd82c749970c2b9e6d2 # 17:37 G 11 0 0 0 Merge tag 'mmc-v4.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
git bisect bad 394c73d396284897207dbb1bad2a43e621cb9dac # 18:02 B 0 1 15 0 Merge tag 'modules-for-v4.16-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux
git bisect bad c4f4d2f917729e9b7b8bb452bf4971be93e7a15f # 21:10 B 0 3 47 30 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
git bisect bad 5a9f8df68ee6927f21dd3f2c75c16feb8b53a9e8 # 21:36 B 0 1 15 0 net: dsa: Fix dsa_is_user_port() test inversion
git bisect bad 652dfb2b31b076153c73106863a4a57e5318c152 # 22:21 B 0 1 15 0 Merge tag 'wireless-drivers-for-davem-2018-03-08' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers
git bisect bad 17cfe79a65f98abe535261856c5aef14f306dff7 # 22:50 B 0 5 19 0 l2tp: do not accept arbitrary sockets
git bisect bad 89036a2a9852f70dcec97d5962974fe806828382 # 23:38 B 0 11 25 0 Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth
git bisect good 25b5cdfcce1b57971840505dfc78556bd12dea6d # 23:41 G 11 0 0 0 dt-bindings: net: renesas-ravb: Make stream buffer optional
git bisect bad 803fafbe0cd522fa6b9e41ca3b96cfb2e2a2222d # 23:41 B 0 12 26 0 fsl/fman: avoid sleeping in atomic context while adding an address
git bisect bad 499ac3b60f657dae82055fc81c7b01e6242ac9bc # 02:30 B 0 1 46 31 test_rhashtable: add test case for rhltable with duplicate objects
git bisect good d3dcf8eb615537526bd42ff27a081d46d337816e # 02:38 G 11 0 0 0 rhashtable: Fix rhlist duplicates insertion
# first bad commit: [499ac3b60f657dae82055fc81c7b01e6242ac9bc] test_rhashtable: add test case for rhltable with duplicate objects
git bisect good d3dcf8eb615537526bd42ff27a081d46d337816e # 02:44 G 31 0 1 1 rhashtable: Fix rhlist duplicates insertion
# extra tests with debug options
git bisect bad 499ac3b60f657dae82055fc81c7b01e6242ac9bc # 02:59 B 0 1 15 0 test_rhashtable: add test case for rhltable with duplicate objects
# extra tests on HEAD of linux-devel/devel-spot-201805280757
git bisect bad 2596d8a199c5af892e078928af7ce19aa92c0e7b # 03:05 B 0 13 30 0 0day head guard for 'devel-spot-201805280757'
# extra tests on tree/branch linus/master
git bisect bad 786b71f5b754273ccef6d9462e52062b3e1f9877 # 03:05 B 0 37 51 0 Merge tag 'nds32-for-linus-4.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/greentime/linux
# extra tests with first bad commit reverted
git bisect good 79f277eeeff640b44a201bd5fcf00db69d022f6c # 03:22 G 11 0 0 0 Revert "test_rhashtable: add test case for rhltable with duplicate objects"
# extra tests on tree/branch linux-next/master
git bisect bad 47b9cef0672d53ecaaba7e7733ece9da05ba47d4 # 03:22 B 0 12 26 0 Merge branch 'akpm/master'
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
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