Greetings, 0day kernel testing robot got the below dmesg and the first bad commit is git://internal_merge_and_test_tree devel-hourly-2017021823 commit 2acdde7750ea3a261f08f34e39ba0652ebc8c3d5 Merge: 6a6281c 947a7ea Author: 0day robot <fengguang.wu(a)intel.com&gt; AuthorDate: Sun Feb 19 02:26:32 2017 +0800 Commit: 0day robot <fengguang.wu(a)intel.com&gt; CommitDate: Sun Feb 19 02:26:32 2017 +0800 Merge 'dax/wlist' into devel-hourly-2017021823 2acdde7750 Merge 'dax/wlist' into devel-hourly-2017021823 +--------------------------------------------------+----+ | | | +--------------------------------------------------+----+ | boot_successes | 0 | | boot_failures | 39 | | INFO:suspicious_RCU_usage | 38 | | INFO:task_blocked_for_more_than#seconds | 36 | | INFO:lockdep_is_turned_off | 35 | | Kernel_panic-not_syncing:hung_task:blocked_tasks | 36 | +--------------------------------------------------+----+ [ 4.663240] Duration of test: 742146576 ns [ 4.663959] Average test time: 743132709 [ 4.664398] Testing concurrent rhashtable access from 10 threads [ 8.729714] [ 8.732017] =============================== [ 8.732486] [ INFO: suspicious RCU usage. ] [ 8.733014] 4.10.0-rc8-07697-g2acdde7 #1 Not tainted [ 8.733566] ------------------------------- [ 8.734052] lib/rhashtable.c:1126 suspicious rcu_dereference_protected() usage! [ 8.735014] [ 8.735014] other info that might help us debug this: [ 8.735014] [ 8.735865] [ 8.735865] rcu_scheduler_active = 2, debug_locks = 0 [ 8.736579] 1 lock held by rhashtable_thra/176: [ 8.737178] #0: (rcu_read_lock){......}, at: [<ffffffff9bfa7b5d>] thread_lookup_test+0xad/0x540 [ 8.738233] [ 8.738233] stack backtrace: [ 8.738725] CPU: 0 PID: 176 Comm: rhashtable_thra Not tainted 4.10.0-rc8-07697-g2acdde7 #1 [ 8.739620] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014 [ 8.740795] Call Trace: [ 8.741080] dump_stack+0x19/0x20 [ 8.741443] lockdep_rcu_suspicious+0xfe/0x110 [ 8.741948] rht_bucket_nested+0xf0/0x230 [ 8.742403] thread_lookup_test+0x214/0x540 [ 8.742944] ? thread_lookup_test+0xad/0x540 [ 8.743492] ? jhash+0x220/0x220 [ 8.743872] ? rhashtable_insert_slow+0x29/0x110 [ 8.744390] ? insert_retry+0x251/0x5f0 [ 8.745032] threadfunc+0x141/0x6f0 [ 8.745414] ? trace_hardirqs_on+0xd/0x10 [ 8.745856] ? __kthread_parkme+0xdb/0x100 [ 8.746293] kthread+0x1cb/0x1e0 [ 8.746647] ? insert_retry+0x5f0/0x5f0 [ 8.747267] ? __kthread_create_on_node+0x2e0/0x2e0 [ 8.747819] ret_from_fork+0x31/0x40 [ 13.973510] Started 10 threads, 0 failed [ 14.186234] test_bitmap: all 460506 tests passed [ 14.186864] test_uuid: all 18 tests passed [ 14.191804] crc32: CRC_LE_BITS = 8, CRC_BE BITS = 8 [ 14.192370] crc32: self tests passed, processed 225944 bytes in 2091318 nsec git bisect start 171f40b4581864c00a8159f6ba19dd02d012bf26 7089db84e356562f8ba737c29e472cc42d530dbc -- git bisect good 6f4eabb22829ac3a4b91b8636f6e6742fc895f32 # 20:07 33+ 0 Merge 'linux-review/simran-singhal/staging-rtl8192u-fixing-white-space-issue/20170215-043641' into devel-hourly-2017021823 git bisect bad 3b5dc5d37acd8ad092d764b8a6e2fab3e73a0103 # 20:24 0- 8 Merge 'linux-review/Florian-Westphal/netfilter-nat-remove-incorrect-debug-assert/20170209-063353' into devel-hourly-2017021823 git bisect bad c907b1dfd74ac2da5d2096f7d3c222e6bd69471e # 20:52 1- 8 Merge 'pwm/for-4.11/acpi' into devel-hourly-2017021823 git bisect good 902585b2d89a02329b31335d8f2ccc177773854b # 21:13 35+ 36 Merge 'mellanox/queue-rc' into devel-hourly-2017021823 git bisect good 7fda1dcd5c5e28d035aeab337342b37c3eac256b # 21:27 35+ 36 Merge 'linux-review/Ming-Lei/block-loop-fix-race-between-I-O-and-set_status/20170211-114516' into devel-hourly-2017021823 git bisect good 1634f155d118930b9699c6c792f8029fca49769b # 21:43 34+ 36 Merge 'pci/pci/host-hv' into devel-hourly-2017021823 git bisect bad 46d151895c5c82dbf6f9bbe35e5f33063f019081 # 21:55 0- 3 Merge 'linux-review/Dmitry-Torokhov/gpio-return-NULL-from-gpiod_get_optional-when-GPIOLIB-is-disabled/20170213-091717' into devel-hourly-2017021823 git bisect good 6a6281c7fe53e49cbe42c3505295e9811b124f89 # 22:08 35+ 37 Merge 'linux-review/Joe-Perches/compiler-compiler-gcc-Add-__fallthrough/20170211-050556' into devel-hourly-2017021823 git bisect bad 2acdde7750ea3a261f08f34e39ba0652ebc8c3d5 # 22:35 0- 6 Merge 'dax/wlist' into devel-hourly-2017021823 git bisect good e73639b1a67abc581c3b7671556a439c41353bca # 22:58 35+ 37 fold list.h git bisect good 947a7ea93f3d85ddc885b02550ce263f15921544 # 23:09 35+ 39 Convert semaphores to use waitlists # first bad commit: [2acdde7750ea3a261f08f34e39ba0652ebc8c3d5] Merge 'dax/wlist' into devel-hourly-2017021823 git bisect good 6a6281c7fe53e49cbe42c3505295e9811b124f89 # 23:18 105+ 142 Merge 'linux-review/Joe-Perches/compiler-compiler-gcc-Add-__fallthrough/20170211-050556' into devel-hourly-2017021823 git bisect good 947a7ea93f3d85ddc885b02550ce263f15921544 # 23:27 105+ 143 Convert semaphores to use waitlists # extra tests with CONFIG_DEBUG_INFO_REDUCED git bisect bad 2acdde7750ea3a261f08f34e39ba0652ebc8c3d5 # 23:43 5- 14 Merge 'dax/wlist' into devel-hourly-2017021823 # extra tests on HEAD of linux-devel/devel-hourly-2017021823 git bisect bad 171f40b4581864c00a8159f6ba19dd02d012bf26 # 23:43 0- 23 0day head guard for 'devel-hourly-2017021823' # extra tests on tree/branch linux-devel/devel-hourly-2017021823 git bisect bad 171f40b4581864c00a8159f6ba19dd02d012bf26 # 23:45 0- 23 0day head guard for 'devel-hourly-2017021823' --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/lkp Intel Corporation