[n_tty] 6bd9edcb2a: BUG:kernel_hang_in_test_stage
by kernel test robot
FYI, we noticed the following commit (built with gcc-7):
commit: 6bd9edcb2ac76742bbe95f962a14bdbdca08fb18 ("n_tty: Protect tty->disc_data using refcount.")
https://github.com/0day-ci/linux UPDATE-20180830-074540/Tetsuo-Handa/n_tty-Protect-tty-disc_data-using-refcount/20180718-214043
in testcase: cpu-hotplug
with following parameters:
on test machine: qemu-system-i386 -enable-kvm -m 256M
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-------------------------------+------------+------------+
| | fefe287e4b | 6bd9edcb2a |
+-------------------------------+------------+------------+
| boot_successes | 12 | 4 |
| boot_failures | 0 | 6 |
| BUG:kernel_hang_in_test_stage | 0 | 6 |
+-------------------------------+------------+------------+
[ 7281.897723] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 7282.747789] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 7312.125308] e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
[ 7312.130066] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 7313.051507] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
BUG: kernel hang in test stage
Elapsed time: 7280
#!/bin/bash
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Rong, Chen
3 years, 8 months
- 1
- 0
[blkcg] c02c58dab2: WARNING:at_block/blk-throttle.c:#blk_throtl_bio
by kernel test robot
FYI, we noticed the following commit (built with gcc-6):
commit: c02c58dab2480ec45dc43e1e10970d763e6b7f1f ("[PATCH 06/15] blkcg: always associate a bio with a blkg")
url: https://github.com/0day-ci/linux/commits/Dennis-Zhou/blkcg-ref-count-refa...
base: https://git.kernel.org/cgit/linux/kernel/git/axboe/linux-block.git for-next
in testcase: trinity
with following parameters:
runtime: 300s
test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/
on test machine: qemu-system-x86_64 -enable-kvm -cpu host -smp 2 -m 1G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+------------------------------------------------------------------+------------+------------+
| | 1a3eeea831 | c02c58dab2 |
+------------------------------------------------------------------+------------+------------+
| boot_successes | 6 | 0 |
| boot_failures | 6 | 16 |
| invoked_oom-killer:gfp_mask=0x | 4 | 6 |
| Mem-Info | 5 | 9 |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 4 | 6 |
| Out_of_memory:Kill_process | 2 | 3 |
| WARNING:at_block/blk-throttle.c:#blk_throtl_bio | 0 | 10 |
| RIP:blk_throtl_bio | 0 | 10 |
+------------------------------------------------------------------+------------+------------+
[ 120.023103] WARNING: CPU: 1 PID: 1 at block/blk-throttle.c:2149 blk_throtl_bio+0xdaf/0x2490
[ 120.051033] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.19.0-rc1-00168-gc02c58d #1
[ 120.074200] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 120.100912] RIP: 0010:blk_throtl_bio+0xdaf/0x2490
[ 120.114291] Code: 08 84 d2 0f 85 1a 13 00 00 66 41 81 4f 14 00 02 e9 ed f3 ff ff 48 83 05 ce 31 ff 05 01 e9 f3 fb ff ff 48 83 05 39 45 ff 05 01 <0f> 0b 48 83 05 37 45 ff 05 01 e9 25 f3 ff ff 49 8d bf 28 02 00 00
[ 120.167531] RSP: 0000:ffff880030e36fd0 EFLAGS: 00010202
[ 120.184191] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 120.204216] RDX: 0000000000000000 RSI: ffffffffa72f04c0 RDI: 0000000000000206
[ 120.224215] RBP: ffff880030e370a0 R08: 0000000002384946 R09: 00000000023a2d90
[ 120.247539] R10: ffffed00062bc4fa R11: ffff8800315e27d3 R12: ffff880030f60150
[ 120.267576] R13: ffff88001c7a5b00 R14: ffff880030794400 R15: ffff880030f60140
[ 120.287560] FS: 0000000000000000(0000) GS:ffff880031400000(0000) knlGS:0000000000000000
[ 120.314198] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 120.330963] CR2: 0000000000000000 CR3: 000000000fc6d000 CR4: 00000000000006a0
[ 120.350859] Call Trace:
[ 120.360930] ? bio_associate_create_blkg+0x30d/0x950
[ 120.374222] ? reacquire_held_locks+0x400/0x400
[ 120.387606] ? bio_associate_blkg+0x240/0x240
[ 120.404166] ? do_raw_spin_unlock+0x16a/0x2d0
[ 120.417570] ? _raw_spin_unlock+0x5c/0xa0
[ 120.430924] generic_make_request_checks+0x8fa/0x14b0
[ 120.444270] ? percpu_ref_put_many+0x1c0/0x1c0
[ 120.460957] ? kasan_check_write+0x24/0x30
[ 120.474243] ? sched_clock_local+0x99/0x1c0
[ 120.487567] generic_make_request+0x237/0xdf0
[ 120.500949] ? sched_clock_cpu+0x20c/0x2a0
[ 120.514268] ? blk_plug_queued_count+0x180/0x180
[ 120.530925] ? debug_smp_processor_id+0x1f/0x30
[ 120.544243] submit_bio+0x2a0/0x410
[ 120.557564] ? submit_bio+0x2a0/0x410
[ 120.568470] ? lock_acquire+0x112/0x1d0
[ 120.580903] ? guard_bio_eod+0xb0/0x420
[ 120.590936] ? direct_make_request+0x240/0x240
[ 120.607501] ? guard_bio_eod+0x1b6/0x420
[ 120.617592] ? bio_add_page+0xd0/0x100
[ 120.630913] submit_bh_wbc+0x526/0x840
[ 120.640978] ? unlock_buffer+0x40/0x40
[ 120.654304] block_read_full_page+0x807/0xba0
[ 120.667591] ? bh_submit_read+0x240/0x240
[ 120.673290] ? create_page_buffers+0x210/0x210
[ 120.691014] ? add_to_page_cache_locked+0x20/0x20
[ 120.707532] ? alloc_page_interleave+0x139/0x1b0
[ 120.724230] ? __next_node_in+0x59/0x70
[ 120.734304] blkdev_readpage+0x1b/0x30
[ 120.747597] do_read_cache_page+0x795/0x1150
[ 120.760923] ? blkdev_writepages+0x20/0x20
[ 120.774234] ? kasan_unpoison_shadow+0x3d/0x60
[ 120.787530] ? preempt_count_add+0x159/0x210
[ 120.800913] ? pagecache_get_page+0x6f0/0x6f0
[ 120.814162] ? __this_cpu_preempt_check+0x1b/0x30
[ 120.830921] ? kasan_unpoison_shadow+0x3d/0x60
[ 120.844270] ? kasan_alloc_pages+0x40/0x50
[ 120.857909] ? get_page_from_freelist+0x2023/0x33b0
[ 120.870909] read_cache_page+0x53/0x90
[ 120.884132] read_dev_sector+0xc8/0x2c0
[ 120.897509] ? set_info+0x110/0x110
[ 120.907509] msdos_partition+0x231/0x2610
[ 120.920894] ? memcpy+0x6d/0x80
[ 120.930915] ? vsnprintf+0x96f/0x1cf0
[ 120.944176] ? set_info+0x110/0x110
[ 120.984325] ? snprintf+0x8f/0xb0
[ 120.997559] ? snprintf+0x8f/0xb0
[ 121.007498] ? vscnprintf+0x40/0x40
[ 121.017520] ? __next_node_in+0x59/0x70
[ 121.030968] ? set_info+0x110/0x110
[ 121.044221] ? set_info+0x110/0x110
[ 121.057506] check_partition+0x3db/0x7d0
[ 121.070920] rescan_partitions+0x192/0xac0
[ 121.080900] ? __might_sleep+0xad/0x1e0
[ 121.094193] ? bd_set_size+0x305/0x3c0
[ 121.107505] __blkdev_get+0x8c3/0x13b0
[ 121.117547] ? bd_set_size+0x3c0/0x3c0
[ 121.130907] ? debug_smp_processor_id+0x1f/0x30
[ 121.144195] blkdev_get+0x41c/0x9f0
[ 121.157679] ? refcount_sub_and_test_checked+0x100/0x1e0
[ 121.170883] ? __blkdev_get+0x13b0/0x13b0
[ 121.184233] ? do_raw_spin_unlock+0x16a/0x2d0
[ 121.197551] ? refcount_dec_and_test_checked+0x19/0x30
[ 121.214214] ? kobject_put+0x61/0x5a0
[ 121.227913] __device_add_disk+0xfc6/0x12d0
[ 121.241719] ? lock_acquire+0x112/0x1d0
[ 121.254191] ? bdget_disk+0xb0/0xb0
[ 121.291132] ? lockdep_init_map+0x11/0x20
[ 121.304263] ? lockdep_init_map+0x11/0x20
[ 121.317606] ? __raw_spin_lock_init+0x3d/0x120
[ 121.331152] ? device_initialize+0x2d3/0x3e0
[ 121.344254] device_add_disk+0x16/0x20
[ 121.357510] null_add_dev+0xcd5/0x1fe0
[ 121.370892] null_init+0x4cb/0x6c6
[ 121.380903] ? pkt_init+0x578/0x578
[ 121.394231] do_one_initcall+0x191/0x3f3
[ 121.407482] ? start_kernel+0xa52/0xa52
[ 121.417522] ? kasan_unpoison_shadow+0x3d/0x60
[ 121.434217] kernel_init_freeable+0x52f/0x6bb
[ 121.447500] ? rest_init+0x1a0/0x1a0
[ 121.457489] kernel_init+0x16/0x220
[ 121.470867] ? rest_init+0x1a0/0x1a0
[ 121.480914] ret_from_fork+0x1f/0x30
[ 121.494348] ---[ end trace bb75a6ff13d6153b ]---
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Rong, Chen
3 years, 8 months
- 1
- 0
3f906ba236 [ 71.192813] WARNING: possible circular locking dependency detected
by kernel test robot
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 3f906ba23689a3f824424c50f3ae937c2c70f676
Author: Thomas Gleixner <tglx(a)linutronix.de>
AuthorDate: Mon Jul 10 15:50:09 2017 -0700
Commit: Linus Torvalds <torvalds(a)linux-foundation.org>
CommitDate: Mon Jul 10 16:32:33 2017 -0700
mm/memory-hotplug: switch locking to a percpu rwsem
Andrey reported a potential deadlock with the memory hotplug lock and
the cpu hotplug lock.
The reason is that memory hotplug takes the memory hotplug lock and then
calls stop_machine() which calls get_online_cpus(). That's the reverse
lock order to get_online_cpus(); get_online_mems(); in mm/slub_common.c
The problem has been there forever. The reason why this was never
reported is that the cpu hotplug locking had this homebrewn recursive
reader writer semaphore construct which due to the recursion evaded the
full lock dep coverage. The memory hotplug code copied that construct
verbatim and therefor has similar issues.
Three steps to fix this:
1) Convert the memory hotplug locking to a per cpu rwsem so the
potential issues get reported proper by lockdep.
2) Lock the online cpus in mem_hotplug_begin() before taking the memory
hotplug rwsem and use stop_machine_cpuslocked() in the page_alloc
code to avoid recursive locking.
3) The cpu hotpluck locking in #2 causes a recursive locking of the cpu
hotplug lock via __offline_pages() -> lru_add_drain_all(). Solve this
by invoking lru_add_drain_all_cpuslocked() instead.
Link: http://lkml.kernel.org/r/20170704093421.506836322@linutronix.de
Reported-by: Andrey Ryabinin <aryabinin(a)virtuozzo.com>
Signed-off-by: Thomas Gleixner <tglx(a)linutronix.de>
Acked-by: Michal Hocko <mhocko(a)suse.com>
Acked-by: Vlastimil Babka <vbabka(a)suse.cz>
Cc: Vladimir Davydov <vdavydov.dev(a)gmail.com>
Cc: Peter Zijlstra <peterz(a)infradead.org>
Cc: Davidlohr Bueso <dave(a)stgolabs.net>
Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org>
a47fed5b5b mm: swap: provide lru_add_drain_all_cpuslocked()
3f906ba236 mm/memory-hotplug: switch locking to a percpu rwsem
28619527b8 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
f2b6e66e98 Add linux-next specific files for 20180904
+------------------------------------------------------------------+------------+------------+------------+---------------+
| | a47fed5b5b | 3f906ba236 | 28619527b8 | next-20180904 |
+------------------------------------------------------------------+------------+------------+------------+---------------+
| boot_successes | 132 | 17 | 13 | 15 |
| boot_failures | 14 | 29 | 39 | 35 |
| BUG_kmalloc-#(Not_tainted):Redzone_overwritten | 12 | 4 | | |
| INFO:#-#.First_byte#instead_of | 12 | 4 | | |
| INFO:Freed_in_skb_free_head_age=#cpu=#pid= | 1 | 1 | | |
| INFO:Slab#objects=#used=#fp=#flags= | 12 | 4 | | |
| INFO:Object#@offset=#fp=0x(null) | 12 | 4 | | |
| INFO:Freed_in_rcu_process_callbacks_age=#cpu=#pid= | 2 | | | |
| INFO:Freed_in_free_ctx_age=#cpu=#pid= | 3 | 1 | | |
| BUG:unable_to_handle_kernel | 1 | 1 | | |
| Oops:#[##] | 1 | 1 | | |
| Kernel_panic-not_syncing:Fatal_exception | 1 | 1 | | |
| BUG_fasync_cache(Not_tainted):Freelist_Pointer_check_fails | 1 | | | |
| INFO:Slab#objects=#used=#fp=0x(null)flags= | 1 | | | |
| INFO:Object#@offset=#fp= | 1 | | | |
| INFO:Freed_in_free_pipe_info_age=#cpu=#pid= | 2 | | | |
| INFO:Freed_in_load_elf_binary_age=#cpu=#pid= | 1 | | | |
| WARNING:possible_circular_locking_dependency_detected | 0 | 26 | 35 | 31 |
| Mem-Info | 0 | 2 | 6 | 5 |
| INFO:Freed_in_kvfree_age=#cpu=#pid= | 0 | 1 | | |
| invoked_oom-killer:gfp_mask=0x | 0 | 0 | 4 | 4 |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 0 | 0 | 4 | |
| Out_of_memory_and_no_killable_processes | 0 | 0 | 0 | 4 |
| Kernel_panic-not_syncing:System_is_deadlocked_on_memory | 0 | 0 | 0 | 4 |
+------------------------------------------------------------------+------------+------------+------------+---------------+
vm86 returned ENOSYS, marking as inactive. 20044 iterations. [F:14867 S:5032 HI:3700] [ 57.651003] synth uevent: /module/pcmcia_core: unknown uevent action string [ 71.189062] [ 71.191953] ====================================================== [ 71.192813] WARNING: possible circular locking dependency detected [ 71.193664] 4.12.0-10480-g3f906ba #1 Not tainted [ 71.194355] ------------------------------------------------------ [ 71.195211] trinity-c0/1666 is trying to acquire lock: [ 71.195958] (mem_hotplug_lock.rw_sem){.+.+.+}, at: show_slab_objects+0x14b/0x440 [ 71.197284] [ 71.197284] but task is already holding lock: [ 71.198241] (s_active#39){++++.+}, at: kernfs_seq_start+0x44/0xa0 [ 71.199433] [ 71.199433] which lock already depends on the new lock. [ 71.199433] [ 71.200774] [ 71.200774] the existing dependency chain (in reverse order) is: [ 71.201900] [ 71.201900] -> #2 (s_active#39){++++.+}: [ 71.202814] lock_acquire+0xcf/0x2a0 [ 71.203447] __kernfs_remove+0x337/0x410 [ 71.204121] kernfs_remove_by_name_ns+0x49/0xd0 [ 71.204858] sysfs_remove_link+0x19/0x30 [ 71.205528] sysfs_slab_add+0xa6/0x290 [ 71.206182] __kmem_cache_create+0x52a/0x5b0 [ 71.206889] kmem_cache_create+0x239/0x3a0 [ 71.207578] snic_init_module+0x111/0x203 [ 71.208263] do_one_initcall+0x41/0x19c [ 71.208928] kernel_init_freeable+0x1f4/0x27d [ 71.209647] kernel_init+0xe/0x100 [ 71.210268] ret_from_fork+0x2a/0x40 [ 71.210904] [ 71.210904] -> #1 (slab_mutex){+.+.+.}: [ 71.211806] lock_acquire+0xcf/0x2a0 [ 71.212440] __mutex_lock+0x6f/0xda0 [ 71.213075] mutex_lock_nested+0x1b/0x20 [ 71.213745] kmem_cache_create+0x3e/0x3a0 [ 71.214427] ptlock_cache_init+0x24/0x2d [ 71.215102] start_kernel+0x240/0x4a5 [ 71.215747] x86_64_start_reservations+0x2a/0x2c [ 71.216488] x86_64_start_kernel+0x127/0x136 [ 71.217197] verify_cpu+0x0/0xf1 [ 71.217796] [ 71.217796] -> #0 (mem_hotplug_lock.rw_sem){.+.+.+}: [ 71.218816] __lock_acquire+0x120b/0x1240 [ 71.219496] lock_acquire+0xcf/0x2a0 [ 71.220135] get_online_mems+0x47/0xb0 [ 71.220789] show_slab_objects+0x14b/0x440 [ 71.221476] slabs_show+0x13/0x20 [ 71.222089] slab_attr_show+0x1b/0x30 [ 71.222735] sysfs_kf_seq_show+0x109/0x190 [ 71.223421] kernfs_seq_show+0x27/0x30 [ 71.224076] traverse+0xa8/0x230 [ 71.224674] seq_read+0x1c6/0x530 [ 71.225284] kernfs_fop_read+0x18a/0x1e0 [ 71.225956] do_iter_read+0x164/0x1a0 [ 71.226596] vfs_readv+0x67/0x90 [ 71.227197] do_preadv+0x9e/0xb0 [ 71.227795] SyS_preadv+0x11/0x20 [ 71.228400] entry_SYSCALL_64_fastpath+0x23/0xc2 [ 71.229145] [ 71.229145] other info that might help us debug this: [ 71.229145] [ 71.230462] Chain exists of: [ 71.230462] mem_hotplug_lock.rw_sem --> slab_mutex --> s_active#39 [ 71.230462] [ 71.232069] Possible unsafe locking scenario: [ 71.232069] [ 71.233031] CPU0 CPU1 [ 71.233711] ---- ---- [ 71.234390] lock(s_active#39); [ 71.234938] lock(slab_mutex); [ 71.235737] lock(s_active#39); [ 71.236543] lock(mem_hotplug_lock.rw_sem); [ 71.237200] [ 71.237200] COPYING CREDITS Documentation Kbuild Kconfig LICENSES MAINTAINERS Makefile Next README arch block certs crypto drivers firmware fs include init ipc kernel lib localversion-next mm net obj-bisect samples scripts security sound tools usr virt DEADLOCK COPYING CREDITS Documentation Kbuild Kconfig LICENSES MAINTAINERS Makefile Next README arch block certs crypto drivers firmware fs include init ipc kernel lib localversion-next mm net obj-bisect samples scripts security sound tools usr virt [ 71.237200] [ 71.238303] 3 locks held by trinity-c0/1666: [ 71.238956] #0: (&p->lock){+.+.+.}, at: seq_read+0x41/0x530 [ 71.240100] #1: (&of->mutex){+.+.+.}, at: kernfs_seq_start+0x3c/0xa0 [ 71.241327] #2: (s_active#39){++++.+}, at: kernfs_seq_start+0x44/0xa0 [ 71.242558] [ 71.242558] stack backtrace: [ 71.243360] CPU: 0 PID: 1666 Comm: trinity-c0 Not tainted 4.12.0-10480-g3f906ba #1 [ 71.244500] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 [ 71.245724] Call Trace: [ 71.246187] dump_stack+0x8e/0xd7 [ 71.246744] print_circular_bug+0x1c4/0x220 [ 71.247385] __lock_acquire+0x120b/0x1240 [ 71.248015] lock_acquire+0xcf/0x2a0 [ 71.248594] show_slab_objects+0x14b/0x440 [ 71.249250] get_online_mems+0x47/0xb0 [ 71.249853] show_slab_objects+0x14b/0x440 [ 71.250505] show_slab_objects+0x14b/0x440 [ 71.251140] __lock_is_held+0x64/0xb0 [ 71.251751] slabs_show+0x13/0x20 [ 71.252303] slab_attr_show+0x1b/0x30 [ 71.252896] sysfs_kf_seq_show+0x109/0x190 [ 71.253528] kernfs_seq_show+0x27/0x30 [ 71.254130] traverse+0xa8/0x230 [ 71.254673] seq_read+0x1c6/0x530 [ 71.255229] kernfs_fop_read+0x18a/0x1e0 [ 71.255850] do_iter_read+0x164/0x1a0 [ 71.256438] vfs_readv+0x67/0x90 [ 71.256984] trace_hardirqs_on_caller+0xf7/0x190 [ 71.257688] trace_hardirqs_on+0xd/0x10 [ 71.258316] _raw_spin_unlock_irq+0x2c/0x40 [ 71.258980] __fget_light+0x62/0x90 [ 71.259566] do_preadv+0x9e/0xb0 [ 71.260112] SyS_preadv+0x11/0x20 [ 71.260664] entry_SYSCALL_64_fastpath+0x23/0xc2 [ 71.261356] RIP: 0033:0x457389 [ 71.261881] RSP: 002b:00007ffec728b8e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 [ 71.263024] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000457389 [ 71.263979] RDX: 000000000000008c RSI: 0000000002b95250 RDI: 0000000000000094 [ 71.264936] RBP: 00007ff6b84d5000 R08: 0000000000000006 R09: 000000000000fffa [ 71.265891] R10: 0000000000400000 R11: 0000000000000246 R12: 0000000000000000 [ 71.266845] R13: 0000000000000127 R14: 00000000006fe4c0 R15: 00000000cccccccd BusyBox v1.19.4 (2012-04-22 08:49:11 PDT) multi-call binary. Usage: rmmod
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start v4.13 v4.12 --
git bisect bad 63a86362130f4c17eaa57f3ef5171ec43111a54e # 04:59 B 2 2 1 1 Merge tag 'pm-4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
git bisect good 090a81d8766e21d33ab3e4d24e6c8e5eedf086dd # 05:19 G 45 0 5 5 Merge branch 'for-spi' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
git bisect bad ad51271afc21a72479974713abb40ca4b96d1f6b # 05:38 B 1 2 1 1 Merge branch 'akpm' (patches from Andrew)
git bisect good 7cee9384cb3e25de33d75ecdbf08bb15b4ea9fa5 # 06:08 G 49 0 4 4 Fix up over-eager 'wait_queue_t' renaming
git bisect bad fb4e3beeffa47619985f190663c6ef424f063a22 # 06:48 B 8 10 6 7 Merge tag 'iommu-updates-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
git bisect bad a3ddacbae5abc0a5aabb1e75b655e8cd6dc83888 # 07:12 B 3 2 1 1 Merge tag 'chrome-platform-for-linus-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform
git bisect good 322618684353315e14f586b33d8a016286ffa700 # 07:37 G 46 0 8 8 Merge tag 'acpi-extra-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
git bisect bad 9967468c0a109644e4a1f5b39b39bf86fe7507a7 # 08:21 B 6 5 3 3 Merge branch 'akpm' (patches from Andrew)
git bisect good 548aa0e3c516d906dae5edb1fc9a1ad2e490120a # 08:41 G 49 0 12 12 Merge tag 'devprop-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
git bisect good a47fed5b5b014f5a13878b90ef2c3a7dc294189f # 09:25 G 49 0 6 6 mm: swap: provide lru_add_drain_all_cpuslocked()
git bisect bad 2c6deb01525ac11cc03c44fe31e3f45ce2cadaf9 # 09:41 B 6 6 4 4 bitmap: use memcmp optimisation in more situations
git bisect bad b6d0f14abb7c1d9d522c064633c820aaeb9bbfbf # 10:06 B 3 1 0 0 frv: cmpxchg: implement cmpxchg64()
git bisect bad 4d461333f144456b80d9eabd7cee7ac02fa5d0ee # 10:22 B 2 3 1 1 x86/kasan: don't allocate extra shadow memory
git bisect bad bc1bb362334ebc4c65dd4301f10fb70902b3db7d # 10:38 B 7 6 0 0 zram: constify attribute_group structures.
git bisect bad 9d1f4b3f5b29bea431525e528a3ff2dc806ad904 # 11:05 B 1 1 1 1 mm: disallow early_pfn_to_nid on configurations which do not implement it
git bisect bad 3f906ba23689a3f824424c50f3ae937c2c70f676 # 11:22 B 2 6 2 2 mm/memory-hotplug: switch locking to a percpu rwsem
# first bad commit: [3f906ba23689a3f824424c50f3ae937c2c70f676] mm/memory-hotplug: switch locking to a percpu rwsem
git bisect good a47fed5b5b014f5a13878b90ef2c3a7dc294189f # 11:27 G 144 0 12 18 mm: swap: provide lru_add_drain_all_cpuslocked()
# extra tests with debug options
git bisect bad 3f906ba23689a3f824424c50f3ae937c2c70f676 # 11:44 B 1 6 1 2 mm/memory-hotplug: switch locking to a percpu rwsem
# extra tests on HEAD of linux-devel/devel-catchup-201809041401
git bisect bad 6859ff565807876b3ad6f5d7cccedc214bfc51d1 # 11:45 B 5 8 0 0 0day head guard for 'devel-catchup-201809041401'
# extra tests on tree/branch linus/master
git bisect bad 28619527b8a712590c93d0a9e24b4425b9376a8c # 11:59 B 3 2 1 1 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
# extra tests on tree/branch linux-next/master
git bisect bad f2b6e66e9885a2eae12efd73cc6f859213f64c23 # 12:14 B 4 6 1 5 Add linux-next specific files for 20180904
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
3 years, 8 months
- 3
- 2
2fb5ae861f ("of: Use device_type helpers to access the node .."): BUG: spinlock recursion on CPU#0, swapper/1
by kernel test robot
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git dt/testing
commit 2fb5ae861f29911fc1716f63bd9d5ecb81d8f0ac
Author: Rob Herring <robh(a)kernel.org>
AuthorDate: Wed Aug 29 08:36:12 2018 -0500
Commit: Rob Herring <robh(a)kernel.org>
CommitDate: Tue Sep 4 14:56:44 2018 -0500
of: Use device_type helpers to access the node type
Remove directly accessing device_node.type pointer and use the accessors
instead. This will eventually allow removing the type pointer.
Cc: Frank Rowand <frowand.list(a)gmail.com>
Cc: devicetree(a)vger.kernel.org
Signed-off-by: Rob Herring <robh(a)kernel.org>
12c1d13e39 backlight: drop using node name
2fb5ae861f of: Use device_type helpers to access the node type
30bfffccab sound: aoa: Use device_type helpers to access the node type
+-------------------------------+------------+------------+------------+
| | 12c1d13e39 | 2fb5ae861f | 30bfffccab |
+-------------------------------+------------+------------+------------+
| boot_successes | 50 | 0 | 0 |
| boot_failures | 0 | 32 | 15 |
| BUG:spinlock_recursion_on_CPU | 0 | 32 | 15 |
+-------------------------------+------------+------------+------------+
[ 57.318098] OF: /testcase-data/phandle-tests/consumer-a: arguments longer than property [ 57.319039] OF: /testcase-data/phandle-tests/consumer-a: arguments longer than property [ 57.320087] OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1 [ 57.321546] OF: /testcase-data/phandle-tests/consumer-b: could not find phandle [ 57.322429] OF: /testcase-data/phandle-tests/consumer-b: arguments longer than property [ 57.323795] BUG: spinlock recursion on CPU#0, swapper/1 [ 57.324426] lock: devtree_lock+0x0/0x20, .magic: dead4ead, .owner: swapper/1, .owner_cpu: 0 [ 57.325463] CPU: 0 PID: 1 Comm: swapper Not tainted 4.19.0-rc2-00099-g2fb5ae8 #99 [ 57.326340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 [ 57.327314] Call Trace: [ 57.327613] dump_stack+0x16/0x18 [ 57.328042] spin_bug+0x78/0x83 [ 57.328445] do_raw_spin_lock+0x2f/0x59 [ 57.328922] _raw_spin_lock_irqsave+0x3b/0x44 [ 57.329473] of_find_property+0x1a/0x3f [ 57.329952] of_find_property+0x1a/0x3f [ 57.330434] of_get_property+0x8/0x15 [ 57.330891] __of_device_is_compatible+0x87/0xc6 [ 57.331461] __of_match_node+0x27/0x55 [ 57.331927] of_match_node+0x21/0x36 [ 57.332385] of_unittest+0x24fa/0x261a [ 57.332848] _raw_spin_unlock_irqrestore+0x32/0x44 [ 57.333455] early_init_dt_alloc_memory_arch+0x3a/0x3a [ 57.334096] add_device_randomness+0x10d/0x137 [ 57.334668] edd_init+0x289/0x34e [ 57.335145] of_unittest_platform_populate+0x405/0x405 [ 57.335807] do_one_initcall+0x92/0x1e4 [ 57.336304] do_early_param+0xf0/0xf0 [ 57.336772] kernel_init_freeable+0x12d/0x216 [ 57.337342] rest_init+0x109/0x109 [ 57.337792] kernel_init+0x8/0xda [ 57.338225] ret_from_fork+0x2e/0x38 [ 57.338752] ### dt-test ### FAIL of_unittest_match_node():968 /testcase-data/match-node/name1 didn't match anything [ 57.339994] ### dt-test ### FAIL of_unittest_match_node():975 /testcase-data/match-node/a/name2 got wrong match. expected Ca, got Cb [ 57.341440] ### dt-test ### FAIL of_unittest_match_node():975 /testcase-data/match-node/c/name2 got wrong match. expected Cc, got Cb [ 57.342891] ### dt-test ### FAIL of_unittest_match_node():975 /testcase-data/match-node/name7 got wrong match. expected I, got G [ 57.344295] ### dt-test ### FAIL of_unittest_match_node():975 /testcase-data/match-node/name8 got wrong match. expected J, got G
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start 598e4d73f135eb331fc3f054ddaa2e0fbe931def 57361846b52bc686112da6ca5368d11210796804 --
git bisect bad 8dfaae3ef9df2855004dea3223fa301a9647ba7f # 05:49 B 0 7 21 0 Merge 'spi/for-linus' into devel-spot-201809050506
git bisect bad 0f174d4ea9474f71f5cb170cf423810f06330587 # 05:54 B 0 3 23 6 Merge 'block/for-linus' into devel-spot-201809050506
git bisect bad 90e205639e7d01f88eea0e91595d97c23bf65cbf # 06:06 B 0 1 21 6 Merge 'perf/perf/core' into devel-spot-201809050506
git bisect good 2da8e7c9c25d760115682fb3746c6915d987489b # 06:21 G 11 0 0 0 Merge 'hid/for-next' into devel-spot-201809050506
git bisect good be739c7553069c0aaf763f8812e8ef00aee76132 # 06:36 G 10 0 0 0 Merge 'arc/for-curr' into devel-spot-201809050506
git bisect bad 1462d05004aa5da2bab01a9353fe6c3ed637eb46 # 06:45 B 0 3 19 2 Merge 'robh/dt/testing' into devel-spot-201809050506
git bisect good d4edbe18cf21a3de4e4569e3adb46565c137aa9c # 07:01 G 11 0 0 0 staging: Convert to using %pOFn instead of device_node.name
git bisect good aa659aad536fcff0fa488ba3cda7b03ce067e50d # 07:09 G 11 0 0 0 macintosh: Use of_node_name_{eq,prefix} for node name comparisons
git bisect good 70c2c13f99c90122d024e801dc337a9949c0d9cb # 07:29 G 10 0 0 0 staging: media: imx: Use of_node_name_eq for node name comparisons
git bisect good a2ceaac17710b4bb97d23fff88d52f1fc9413719 # 07:29 G 11 0 0 0 ASoC: Use of_node_name_eq for node name comparisons
git bisect good b4208db737deb5aa5966537fa968b080e5401537 # 07:29 G 12 0 0 0 fbdev: Use full_name instead of name property
git bisect bad 2fb5ae861f29911fc1716f63bd9d5ecb81d8f0ac # 07:29 B 0 32 70 0 of: Use device_type helpers to access the node type
git bisect good 12c1d13e39b34d1cede4461d77589fca34ec39a7 # 07:29 G 31 0 0 0 backlight: drop using node name
# first bad commit: [2fb5ae861f29911fc1716f63bd9d5ecb81d8f0ac] of: Use device_type helpers to access the node type
git bisect good 12c1d13e39b34d1cede4461d77589fca34ec39a7 # 07:29 G 31 0 0 0 backlight: drop using node name
# extra tests on HEAD of linux-devel/devel-spot-201809050506
git bisect bad 598e4d73f135eb331fc3f054ddaa2e0fbe931def # 07:30 B 0 23 42 0 0day head guard for 'devel-spot-201809050506'
# extra tests on tree/branch robh/dt/testing
git bisect bad 30bfffccabf1e42fea6dbd22e9c514d4c9dc1296 # 07:32 B 0 13 27 0 sound: aoa: Use device_type helpers to access the node type
# extra tests with first bad commit reverted
git bisect good 2739ba00eeb7c5f4bc13aa03f03db0c66f43f0b2 # 07:54 G 11 0 0 0 Revert "of: Use device_type helpers to access the node type"
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
3 years, 8 months
- 1
- 0
db67064542 ("ipc: Convert mqueue fs to fs_context"): general protection fault: 0000 [#1]
by kernel test robot
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git nfs-mount-api
commit db67064542f3cec50b4689a0bc7a5716fb757c92
Author: David Howells <dhowells(a)redhat.com>
AuthorDate: Fri Jun 15 23:27:23 2018 +0100
Commit: David Howells <dhowells(a)redhat.com>
CommitDate: Thu Aug 30 14:33:22 2018 +0100
ipc: Convert mqueue fs to fs_context
Convert the mqueue filesystem to use the filesystem context stuff.
Notes:
(1) The relevant ipc namespace is selected in when the context is
initialised (and it defaults to the current task's ipc namespace).
The caller can override this before calling vfs_get_tree().
(2) Rather than simply calling kern_mount_data(), mq_init_ns() and
mq_internal_mount() create a context, adjust it and then do the rest
of the mount procedure.
(3) The lazy mqueue mounting on creation of a new namespace is retained
from a previous patch, but the avoidance of sget() if no superblock
yet exists is reverted and the superblock is again keyed on the
namespace pointer.
Yes, there was a performance gain in not searching the superblock
hash, but it's only paid once per ipc namespace - and only if someone
uses mqueue within that namespace, so I'm not sure it's worth it,
especially as calling sget() allows avoidance of recursion.
Signed-off-by: David Howells <dhowells(a)redhat.com>
ba88169d5b proc: Add fs_context support to procfs
db67064542 ipc: Convert mqueue fs to fs_context
0855e8a8d6 nfs: Allow configuration retrieval with fsinfo()
+------------------------------------------+------------+------------+------------+
| | ba88169d5b | db67064542 | 0855e8a8d6 |
+------------------------------------------+------------+------------+------------+
| boot_successes | 37 | 4 | 0 |
| boot_failures | 0 | 11 | 11 |
| general_protection_fault:#[##] | 0 | 10 | 11 |
| RIP:mqueue_get_tree | 0 | 11 | 11 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 11 | 11 |
+------------------------------------------+------------+------------+------------+
Generating file descriptors Added 70 filenames from /dev Added 25074 filenames from /proc Added 28351 filenames from /sys [ 32.885127] segfault at 4573da ip 00000000004573da sp 00007ffef5c6e7d8 error 15 [ 32.887858] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 08 85 9e 06 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 40 00 00 00 0a 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0e 00 00 00 00 00 00 00 cb bb 79 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 40 00 00 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 5e 7f da 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 50 00 00 00 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 05 00 00 00 00 00 00 00 b0 e6 2e 0f 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 60 00 00 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 09 00 00 00 00 00 00 00 51 24 50 0c 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -- move_pages (279) returned ENOSYS, marking as inactive. set_mempolicy (238) returned ENOSYS, marking as inactive. process_vm_readv (310) returned ENOSYS, marking as inactive. vm86old returned ENOSYS, marking as inactive. process_vm_writev (311) returned ENOSYS, marking as inactive. [ 62.627087] general protection fault: 0000 [ 62.629856] CPU: 0 PID: 681 Comm: trinity-c3 Tainted: G T 4.19.0-rc1-00108-gdb67064 #1 [ 62.632189] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 [ 62.634350] RIP: 0010:mqueue_get_tree+0x4d/0xec [ 62.635577] Code: e9 86 f9 00 49 8b 04 24 4c 8b 68 48 31 c0 4d 85 ed 0f 95 c0 48 83 c0 02 48 ff 04 c5 48 00 4e 84 4d 85 ed 74 26 e8 f7 60 76 ff <49> 8b 45 10 48 8b b8 a8 02 00 00 e8 ef f7 ff ff 48 89 43 18 48 8b [ 62.640017] RSP: 0018:ffffc90000c6fd98 EFLAGS: 00010293 [ 62.641399] RAX: 0000000000000000 RBX: ffff880018be7798 RCX: ffff880018550040 [ 62.643172] RDX: 0000000000000000 RSI: ffffffff81a211b5 RDI: ffffffff83f27d88 [ 62.644945] RBP: ffffc90000c6fdb8 R08: 0000000000000001 R09: 0000000000000000 [ 62.646720] R10: ffff880018550400 R11: 0000000000000000 R12: ffff8800197d5ae8 [ 62.648496] R13: 6b6b6b6b6b6b6b6b R14: ffff880018550040 R15: ffff880018778700 [ 62.650257] FS: 00000000010bb880(0000) GS:ffffffff83c7c000(0000) knlGS:0000000000000000 [ 62.652336] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.653818] CR2: 0000000000482d20 CR3: 0000000018911002 CR4: 00000000000606f0 [ 62.655596] Call Trace: [ 62.656388] vfs_get_tree+0xad/0x2d6 [ 62.657410] mq_init_ns+0xa9/0x14c [ 62.658407] copy_ipcs+0x130/0x1bf [ 62.659403] create_new_namespaces+0x124/0x30d [ 62.660648] unshare_nsproxy_namespaces+0xc5/0xfe [ 62.661960] ksys_unshare+0x3a4/0x639 [ 62.663051] __x64_sys_unshare+0x1b/0x20 [ 62.664206] do_syscall_64+0xb8/0xd0 [ 62.665281] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.666682] RIP: 0033:0x458527 [ 62.667654] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 72 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8d 72 00 00 c3 66 2e 0f 1f 84 00 00 00 00 [ 62.672349] RSP: 002b:00007ffffa6a7ff8 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 62.674343] RAX: ffffffffffffffda RBX: 000000000158d950 RCX: 0000000000458527 [ 62.676069] RDX: 0000000001045520 RSI: 00007ffffa6a7fdc RDI: 0000000008000000 [ 62.677778] RBP: 00000000000002a9 R08: 00000000010454e4 R09: 0000000001045560 [ 62.679673] R10: 0000000000456697 R11: 0000000000000217 R12: 00000000004b7820 [ 62.681566] R13: 0000000000000003 R14: 00000000000002a1 R15: 0000000000000004 [ 62.683708] ---[ end trace 845f54fe2e33db89 ]--- [ 62.685086] RIP: 0010:mqueue_get_tree+0x4d/0xec [ 62.686421] Code: e9 86 f9 00 49 8b 04 24 4c 8b 68 48 31 c0 4d 85 ed 0f 95 c0 48 83 c0 02 48 ff 04 c5 48 00 4e 84 4d 85 ed 74 26 e8 f7 60 76 ff <49> 8b 45 10 48 8b b8 a8 02 00 00 e8 ef f7 ff ff 48 89 43 18 48 8b [ 62.690958] RSP: 0018:ffffc90000c6fd98 EFLAGS: 00010293 [ 62.692366] RAX: 0000000000000000 RBX: ffff880018be7798 RCX: ffff880018550040 [ 62.694142] RDX: 0000000000000000 RSI: ffffffff81a211b5 RDI: ffffffff83f27d88 [ 62.695933] RBP: ffffc90000c6fdb8 R08: 0000000000000001 R09: 0000000000000000 [ 62.697715] R10: ffff880018550400 R11: 0000000000000000 R12: ffff8800197d5ae8 [ 62.699509] R13: 6b6b6b6b6b6b6b6b R14: ffff880018550040 R15: ffff880018778700 [ 62.701298] FS: 00000000010bb880(0000) GS:ffffffff83c7c000(0000) knlGS:0000000000000000 [ 62.703411] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.704932] CR2: 0000000000482d20 CR3: 0000000018911002 CR4: 00000000000606f0 [ 62.706714] Kernel panic - not syncing: Fatal exception [ 62.708088] Kernel Offset: disabled Elapsed time: 70 qemu-img create -f qcow2 disk-yocto-kbuild-39-0 256G
Generating file descriptors Added 70 filenames from /dev Added 25074 filenames from /proc Added 28351 filenames from /sys [ 32.885127] segfault at 4573da ip 00000000004573da sp 00007ffef5c6e7d8 error 15 [ 32.887858] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 08 85 9e 06 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 40 00 00 00 0a 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0e 00 00 00 00 00 00 00 cb bb 79 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 40 00 00 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 5e 7f da 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 50 00 00 00 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 05 00 00 00 00 00 00 00 b0 e6 2e 0f 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 60 00 00 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 09 00 00 00 00 00 00 00 51 24 50 0c 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -- move_pages (279) returned ENOSYS, marking as inactive. set_mempolicy (238) returned ENOSYS, marking as inactive. process_vm_readv (310) returned ENOSYS, marking as inactive. vm86old returned ENOSYS, marking as inactive. process_vm_writev (311) returned ENOSYS, marking as inactive. [ 62.627087] general protection fault: 0000 [ 62.629856] CPU: 0 PID: 681 Comm: trinity-c3 Tainted: G T 4.19.0-rc1-00108-gdb67064 #1 [ 62.632189] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 [ 62.634350] RIP: 0010:mqueue_get_tree+0x4d/0xec [ 62.635577] Code: e9 86 f9 00 49 8b 04 24 4c 8b 68 48 31 c0 4d 85 ed 0f 95 c0 48 83 c0 02 48 ff 04 c5 48 00 4e 84 4d 85 ed 74 26 e8 f7 60 76 ff <49> 8b 45 10 48 8b b8 a8 02 00 00 e8 ef f7 ff ff 48 89 43 18 48 8b [ 62.640017] RSP: 0018:ffffc90000c6fd98 EFLAGS: 00010293 [ 62.641399] RAX: 0000000000000000 RBX: ffff880018be7798 RCX: ffff880018550040 [ 62.643172] RDX: 0000000000000000 RSI: ffffffff81a211b5 RDI: ffffffff83f27d88 [ 62.644945] RBP: ffffc90000c6fdb8 R08: 0000000000000001 R09: 0000000000000000 [ 62.646720] R10: ffff880018550400 R11: 0000000000000000 R12: ffff8800197d5ae8 [ 62.648496] R13: 6b6b6b6b6b6b6b6b R14: ffff880018550040 R15: ffff880018778700 [ 62.650257] FS: 00000000010bb880(0000) GS:ffffffff83c7c000(0000) knlGS:0000000000000000 [ 62.652336] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.653818] CR2: 0000000000482d20 CR3: 0000000018911002 CR4: 00000000000606f0 [ 62.655596] Call Trace: [ 62.656388] vfs_get_tree+0xad/0x2d6 [ 62.657410] mq_init_ns+0xa9/0x14c [ 62.658407] copy_ipcs+0x130/0x1bf [ 62.659403] create_new_namespaces+0x124/0x30d [ 62.660648] unshare_nsproxy_namespaces+0xc5/0xfe [ 62.661960] ksys_unshare+0x3a4/0x639 [ 62.663051] __x64_sys_unshare+0x1b/0x20 [ 62.664206] do_syscall_64+0xb8/0xd0 [ 62.665281] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.666682] RIP: 0033:0x458527 [ 62.667654] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 72 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8d 72 00 00 c3 66 2e 0f 1f 84 00 00 00 00 [ 62.672349] RSP: 002b:00007ffffa6a7ff8 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 62.674343] RAX: ffffffffffffffda RBX: 000000000158d950 RCX: 0000000000458527 [ 62.676069] RDX: 0000000001045520 RSI: 00007ffffa6a7fdc RDI: 0000000008000000 [ 62.677778] RBP: 00000000000002a9 R08: 00000000010454e4 R09: 0000000001045560 [ 62.679673] R10: 0000000000456697 R11: 0000000000000217 R12: 00000000004b7820 [ 62.681566] R13: 0000000000000003 R14: 00000000000002a1 R15: 0000000000000004 [ 62.683708] ---[ end trace 845f54fe2e33db89 ]--- [ 62.685086] RIP: 0010:mqueue_get_tree+0x4d/0xec [ 62.686421] Code: e9 86 f9 00 49 8b 04 24 4c 8b 68 48 31 c0 4d 85 ed 0f 95 c0 48 83 c0 02 48 ff 04 c5 48 00 4e 84 4d 85 ed 74 26 e8 f7 60 76 ff <49> 8b 45 10 48 8b b8 a8 02 00 00 e8 ef f7 ff ff 48 89 43 18 48 8b [ 62.690958] RSP: 0018:ffffc90000c6fd98 EFLAGS: 00010293 [ 62.692366] RAX: 0000000000000000 RBX: ffff880018be7798 RCX: ffff880018550040 [ 62.694142] RDX: 0000000000000000 RSI: ffffffff81a211b5 RDI: ffffffff83f27d88 [ 62.695933] RBP: ffffc90000c6fdb8 R08: 0000000000000001 R09: 0000000000000000 [ 62.697715] R10: ffff880018550400 R11: 0000000000000000 R12: ffff8800197d5ae8 [ 62.699509] R13: 6b6b6b6b6b6b6b6b R14: ffff880018550040 R15: ffff880018778700 [ 62.701298] FS: 00000000010bb880(0000) GS:ffffffff83c7c000(0000) knlGS:0000000000000000 [ 62.703411] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.704932] CR2: 0000000000482d20 CR3: 0000000018911002 CR4: 00000000000606f0 [ 62.706714] Kernel panic - not syncing: Fatal exception [ 62.708088] Kernel Offset: disabled Elapsed time: 70 qemu-img create -f qcow2 disk-yocto-kbuild-39-0 256G
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start 5eef5a77bd02bfa5574f58ebe6a5da5b6d04a2b7 57361846b52bc686112da6ca5368d11210796804 --
git bisect good fc92a8f00d14b54aabf584e376123d04ab1fbaa2 # 07:59 G 11 0 0 2 Merge 'linux-review/Edward-Cree/net-introduce-list-entry-point-for-GRO/20180831-190723' into devel-hourly-2018090405
git bisect bad 0a26cd22d61a9beb95b1fe517752ab436fe077f0 # 08:20 B 0 5 19 0 Merge 'linux-review/Yuchung-Cheng/tcp-change-IPv6-flow-label-upon-receiving-spurious-retransmission/20180830-184307' into devel-hourly-2018090405
git bisect good 535e2d4f0b314fcae1ceacd309ac9a2bfd77010e # 08:37 G 10 0 0 0 Merge 'linux-review/Pavel-Zemlyanoy/staging-erofs-formatting-unzip_vle_lz4-c/20180831-035443' into devel-hourly-2018090405
git bisect good f440752c7308d1811f183c1efe47318f87f9e591 # 08:55 G 10 0 0 0 Merge 'linux-review/UPDATE-20180830-232428/Liran-Alon/KVM-nVMX-Fix-loss-of-pending-event-before-entering-L2/20180830-230923' into devel-hourly-2018090405
git bisect bad 221ee6b3f40be5e6e898ef5c0b79b8320777d309 # 09:08 B 0 2 17 0 Merge 'linux-review/Chunfeng-Yun/usb-xhci-mtk-resume-USB3-roothub-first/20180830-211217' into devel-hourly-2018090405
git bisect bad 2f158f0e7e15d5acb04091caecc2089c5679cbaf # 09:31 B 0 10 26 2 Merge 'kvm/queue' into devel-hourly-2018090405
git bisect good 3723839dc7445745fd9526fa499149aa1fff3d11 # 09:47 G 10 0 1 1 Merge 'dinguyen/socfpga_for_next_v4.20_dts_v1' into devel-hourly-2018090405
git bisect bad 8f2f3922ed021c0f5a068901b19f3d1391cf2ecf # 10:16 B 0 2 16 0 Merge 'dhowells-fs/nfs-mount-api' into devel-hourly-2018090405
git bisect bad f80d9cc3e8c8b76f3129548a46a2933ae87a5101 # 10:36 B 0 4 19 1 Merge 'dhowells-fs/fsinfo' into devel-hourly-2018090405
git bisect bad db67064542f3cec50b4689a0bc7a5716fb757c92 # 11:01 B 0 10 24 0 ipc: Convert mqueue fs to fs_context
git bisect good 93c0c3b598483cc688f4a4ff81452e28b50f6c1b # 11:23 G 10 0 0 0 vfs: Put security flags into the fs_context struct
git bisect good 33b51f1bbb477858d154ee6cebaca82827a01597 # 11:39 G 11 0 0 0 vfs: Separate changing mount flags full remount
git bisect good 02acf7418247959a469fd39ad48655fae27c242b # 12:00 G 11 0 0 2 vfs: Remove unused code after filesystem context changes
git bisect good ba88169d5bbccad0137636afc4c8c093f95049f7 # 12:19 G 10 0 0 0 proc: Add fs_context support to procfs
# first bad commit: [db67064542f3cec50b4689a0bc7a5716fb757c92] ipc: Convert mqueue fs to fs_context
git bisect good ba88169d5bbccad0137636afc4c8c093f95049f7 # 12:25 G 33 0 0 0 proc: Add fs_context support to procfs
# extra tests with debug options
git bisect bad db67064542f3cec50b4689a0bc7a5716fb757c92 # 12:50 B 0 8 22 0 ipc: Convert mqueue fs to fs_context
# extra tests on HEAD of linux-devel/devel-hourly-2018090405
git bisect bad 5eef5a77bd02bfa5574f58ebe6a5da5b6d04a2b7 # 12:50 B 2 11 0 0 0day head guard for 'devel-hourly-2018090405'
# extra tests on tree/branch dhowells-fs/nfs-mount-api
git bisect bad 0855e8a8d6621018ee7233670d6af46e124ed085 # 13:10 B 0 5 19 0 nfs: Allow configuration retrieval with fsinfo()
# extra tests with first bad commit reverted
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
3 years, 8 months
- 1
- 0
545b8a22e9 BUG: kernel reboot-without-warning in test stage
by kernel test robot
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
https://github.com/0day-ci/linux/commits/Andrey-Konovalov/khwasan-kernel-...
commit 545b8a22e9764e9783a4019ba12a3a1ac71c7c71
Author: Andrey Konovalov <andreyknvl(a)google.com>
AuthorDate: Wed Aug 29 13:35:06 2018 +0200
Commit: 0day robot <lkp(a)intel.com>
CommitDate: Thu Aug 30 04:56:31 2018 +0800
khwasan: move common kasan and khwasan code to common.c
KHWASAN will reuse a significant part of KASAN code, so move the common
parts to common.c without any functional changes.
Signed-off-by: Andrey Konovalov <andreyknvl(a)google.com>
b83b4e31db khwasan, mm: change kasan hooks signatures
545b8a22e9 khwasan: move common kasan and khwasan code to common.c
f510b4ec4f kasan: add SPDX-License-Identifier mark to source files
+------------------------------------------------------------------+------------+------------+------------+
| | b83b4e31db | 545b8a22e9 | f510b4ec4f |
+------------------------------------------------------------------+------------+------------+------------+
| boot_successes | 988 | 772 | 26 |
| boot_failures | 6 | 24 | |
| invoked_oom-killer:gfp_mask=0x | 2 | 2 | |
| Mem-Info | 4 | 5 | |
| Out_of_memory:Kill_process | 3 | | |
| IP-Config:Auto-configuration_of_network_failed | 2 | | |
| BUG:kernel_reboot-without-warning_in_test_stage | 0 | 14 | |
| BUG:kernel_hang_in_test_stage | 0 | 5 | |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 0 | 2 | |
+------------------------------------------------------------------+------------+------------+------------+
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start 4d30a6ec667c3be5e517c6db7386b7cbeae0d241 5b394b2ddf0347bef56e50c69a58773c94343ff3 --
git bisect bad 6a62e337f13403ec965bc73faa931e91b977ea5a # 12:51 B 106 3 0 20 Merge 'linux-review/Andrey-Konovalov/khwasan-kernel-hardware-assisted-address-sanitizer/20180830-045630' into devel-catchup-201808300657
git bisect good b415cf311a6e49d23247404e903da92cd46e8784 # 13:20 G 910 0 93 107 Merge 'linux-review/Dong-Aisheng/clk-new-APIs-to-handle-all-available-clocks/20180830-053055' into devel-catchup-201808300657
git bisect good 3e5b238ca74a7ea478ab1c9936323d0d63276ffd # 13:50 G 906 0 102 115 Merge 'hwmon/hwmon-next' into devel-catchup-201808300657
git bisect good a0e3bcf82ff28a5a1c1d7373b5625e70028b81fd # 14:20 G 906 0 94 107 Merge 'bpf-next/master' into devel-catchup-201808300657
git bisect good ac5e518cd6aaf4993eb06bd17dcdbfc79a460889 # 01:57 G 904 0 90 105 Merge 'linux-review/Larry-Chen/fix-crash-on-ocfs2_duplicate_clusters_by_page/20180830-040330' into devel-catchup-201808300657
git bisect good 629a1c7ad49fb70ac8965e7330eb0e8870796b04 # 02:28 G 910 0 102 125 Merge 'linux-review/Javier-Gonz-lez/lightnvm-pblk-add-helpers-for-chunk-addresses/20180830-043937' into devel-catchup-201808300657
git bisect bad a8426dae0fbb17f74c2f4a0ce23fe185021d4aa2 # 02:28 B 104 3 0 24 khwasan, arm64: fix up fault handling logic
git bisect bad 1e1353ecc04c6c1f0e99a0604d7c525ea39941f1 # 02:29 B 109 4 0 16 khwasan, arm64: adjust shadow size for CONFIG_KASAN_HW
git bisect bad 545b8a22e9764e9783a4019ba12a3a1ac71c7c71 # 02:29 B 768 17 0 144 khwasan: move common kasan and khwasan code to common.c
git bisect good b83b4e31db0c6949ed316b6ed3ad37ea85d75837 # 18:43 G 901 0 125 127 khwasan, mm: change kasan hooks signatures
# first bad commit: [545b8a22e9764e9783a4019ba12a3a1ac71c7c71] khwasan: move common kasan and khwasan code to common.c
git bisect good b83b4e31db0c6949ed316b6ed3ad37ea85d75837 # 18:52 G 1009 0 25 152 khwasan, mm: change kasan hooks signatures
# extra tests with debug options
git bisect bad 545b8a22e9764e9783a4019ba12a3a1ac71c7c71 # 19:12 B 2 1 2 2 khwasan: move common kasan and khwasan code to common.c
# extra tests on HEAD of linux-devel/devel-catchup-201808300657
git bisect bad 4d30a6ec667c3be5e517c6db7386b7cbeae0d241 # 19:12 B 33 2 0 14 0day head guard for 'devel-catchup-201808300657'
# extra tests on tree/branch linux-review/Andrey-Konovalov/khwasan-kernel-hardware-assisted-address-sanitizer/20180830-045630
git bisect bad f510b4ec4f01d32773bafe33b6a6ce5d5263fc27 # 19:28 B 5 1 0 0 kasan: add SPDX-License-Identifier mark to source files
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
3 years, 8 months
- 2
- 1
7b5b51e7b3 qemux86-64 login: BUG: kernel hang in boot stage
by kernel test robot
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
https://github.com/0day-ci/linux/commits/Andrey-Konovalov/arm64-untag-use...
commit 7b5b51e7b3a988741f7f34d5148f1f4fea86434a
Author: Andrey Konovalov <andreyknvl(a)google.com>
AuthorDate: Thu Aug 30 13:41:16 2018 +0200
Commit: 0day robot <lkp(a)intel.com>
CommitDate: Fri Aug 31 04:21:59 2018 +0800
arm64: annotate user pointers casts detected by sparse
This patch adds __force annotations for __user pointers casts detected by
sparse with the -Wcast-from-as flag enabled (added in [1]).
[1] https://github.com/lucvoo/sparse-dev/commit/5f960cb10f56ec2017c128ef9d160...
Signed-off-by: Andrey Konovalov <andreyknvl(a)google.com>
94a983c993 selftests, arm64: add a selftest for passing tagged pointers to kernel
7b5b51e7b3 arm64: annotate user pointers casts detected by sparse
+----------------------------------------------+------------+------------+
| | 94a983c993 | 7b5b51e7b3 |
+----------------------------------------------+------------+------------+
| boot_successes | 900 | 297 |
| boot_failures | 3 | 13 |
| Mem-Info | 3 | 4 |
| invoked_oom-killer:gfp_mask=0x | 1 | |
| BUG:kernel_hang_in_boot_stage | 0 | 6 |
| qemux86-#login:BUG:kernel_hang_in_boot_stage | 0 | 2 |
| BUG:kernel_hang_in_test_stage | 0 | 1 |
+----------------------------------------------+------------+------------+
: applet not found Stopping Bootlog daemon: bootlogd. Yocto (Built by Poky 7.0) 1.2 qemux86-64 ttyS0 qemux86-64 login: BUG: kernel hang in boot stage Elapsed time: 620 qemu-img create -f qcow2 disk-yocto-lkp-hsw01-56-0 256G qemu-img create -f qcow2 disk-yocto-lkp-hsw01-56-1 256G
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start a1bf297f8c115610d22603f4c6f5bc19356a58ee 5b394b2ddf0347bef56e50c69a58773c94343ff3 --
git bisect bad baf413d35111b2c3818ce60b0e98e3f1a3c2805b # 00:41 B 105 1 2 2 Merge 'kvm/queue' into devel-hourly-2018083117
git bisect good 05f6f3b900a72ffebbc5d093af7e50f10f0ef1f7 # 01:25 G 302 0 5 5 Merge 'linux-review/Sam-Ravnborg/atmel_lcdfb-support-native-mode-display-timings/20180827-014610' into devel-hourly-2018083117
git bisect good be6452a763c931e1416c04e84e8720f031aa64c9 # 01:43 G 310 0 9 9 Merge 'linux-review/gregkh-linuxfoundation-org/Patch-usb-phy-fix-PPC64-build-errors-in-phy-fsl-usb-c-has-been-added-to-the-4-14-stable-tree/20180827-101637' into devel-hourly-2018083117
git bisect good f48aa09fa6cf646d431b3f1559b5ef4861ef9601 # 02:13 G 304 0 5 5 Merge 'linux-review/Baruch-Siach/net-mvpp2-initialize-port-of_node-pointer/20180827-201405' into devel-hourly-2018083117
git bisect good 5b6e79a38e87c18253e7e5e56b65b822e96412c2 # 02:33 G 310 0 4 4 Merge 'linux-review/UPDATE-20180828-102007/Rob-Herring/ARM-omap-Convert-to-using-pOFn-instead-of-device_node-name/20180828-100534' into devel-hourly-2018083117
git bisect bad bf6afc5a83a3fa8f5ac056dbe84a62920615ca7d # 02:58 B 279 2 10 10 Merge 'linux-review/Peng-Li/net-hns-fix-some-bugs-about-speed-and-duplex-change/20180827-105509' into devel-hourly-2018083117
git bisect bad 3c981e9cc85cba176c32c3c64f2df90fc27bc955 # 03:25 B 281 2 11 12 Merge 'linux-review/Yinbo-Zhu/arm64-dts-dwc3-Add-description-of-configure-gfladj/20180830-004600' into devel-hourly-2018083117
git bisect bad eb67725bdc29667101742abf383f3906bf354f37 # 03:55 B 282 1 12 12 Merge 'linux-review/Pavel-Zemlyanoy/staging-erofs-formatting-unzip_vle_lz4-c/20180831-035443' into devel-hourly-2018083117
git bisect good 6de1950b35e3380c006a0719b681c03bebf8e14c # 04:24 G 308 0 3 3 Merge 'linux-review/Gustavo-A-R-Silva/i40e-mark-expected-switch-fall-through/20180831-122501' into devel-hourly-2018083117
git bisect bad 492d7b17d57fcb9b92886de0a0497dcfc1036638 # 04:50 B 295 2 11 11 Merge 'linux-review/Andrey-Konovalov/arm64-untag-user-pointers-passed-to-the-kernel/20180831-042151' into devel-hourly-2018083117
git bisect good c47515c1f5de8d9cd956b621e3ce3e2f3d62db22 # 05:28 G 310 0 5 5 arm64: untag user address in __do_user_fault
git bisect good 9a9c7e09ebb8b0aa9d1e64441426c95bf2c6c85b # 05:57 G 310 0 6 6 arm64: update Documentation/arm64/tagged-pointers.txt
git bisect bad 7b5b51e7b3a988741f7f34d5148f1f4fea86434a # 06:25 B 237 2 9 9 arm64: annotate user pointers casts detected by sparse
git bisect good 94a983c993c5e97f6dfd1c4c111b1b91f466bf02 # 07:08 G 305 0 6 9 selftests, arm64: add a selftest for passing tagged pointers to kernel
# first bad commit: [7b5b51e7b3a988741f7f34d5148f1f4fea86434a] arm64: annotate user pointers casts detected by sparse
git bisect good 94a983c993c5e97f6dfd1c4c111b1b91f466bf02 # 07:30 G 915 0 17 27 selftests, arm64: add a selftest for passing tagged pointers to kernel
# extra tests with debug options
git bisect bad 7b5b51e7b3a988741f7f34d5148f1f4fea86434a # 08:10 B 279 1 11 12 arm64: annotate user pointers casts detected by sparse
# extra tests on HEAD of linux-devel/devel-hourly-2018083117
git bisect bad a1bf297f8c115610d22603f4c6f5bc19356a58ee # 08:15 B 132 4 0 9 0day head guard for 'devel-hourly-2018083117'
# extra tests on tree/branch linux-review/Andrey-Konovalov/arm64-untag-user-pointers-passed-to-the-kernel/20180831-042151
git bisect bad 7b5b51e7b3a988741f7f34d5148f1f4fea86434a # 08:16 B 292 2 0 17 arm64: annotate user pointers casts detected by sparse
# extra tests with first bad commit reverted
git bisect good 9ae64dd23bc5f42c053fb66a1f6c7706c31e4582 # 09:06 G 310 0 5 5 Revert "arm64: annotate user pointers casts detected by sparse"
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