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Date: Fri, 2 Jun 2017 09:14:51 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Bart Van Assche <bart.vanassche@...disk.com>
Cc: Christoph Hellwig <hch@....de>, Hannes Reinecke <hare@...e.de>,
LKML <linux-kernel@...r.kernel.org>,
Bart Van Assche <bart.vanassche@...disk.com>, lkp@...org
Subject: [lkp-robot] 105931d39f: BUG:unable_to_handle_kernel
FYI, we noticed the following commit:
commit: 105931d39f6a37845e07f65f7e23b4bed9d1d8f8 ("Move most of scsi_init_command() into scsi_initialize_rq()")
https://github.com/bvanassche/linux for-next
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -smp 2 -m 512M
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+---------------------------------------------+------------+------------+
| | 8e9bd2fd5c | 105931d39f |
+---------------------------------------------+------------+------------+
| boot_successes | 0 | 0 |
| boot_failures | 10 | 39 |
| WARNING:at_block/blk-merge.c:#attempt_merge | 8 | |
| BUG:workqueue_lockup-pool | 1 | |
| BUG:kernel_hang_in_test_stage | 1 | |
| BUG:unable_to_handle_kernel | 0 | 39 |
| Oops:#[##] | 0 | 39 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 39 |
+---------------------------------------------+------------+------------+
[ 6.892331] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 6.893404] IP: scsi_add_cmd_to_list+0x28/0xb0
[ 6.894001] PGD 0
[ 6.894003] P4D 0
[ 6.894288]
[ 6.894776] Oops: 0000 [#1] PREEMPT SMP
[ 6.895302] CPU: 0 PID: 5 Comm: kworker/u4:0 Not tainted 4.12.0-rc2-00339-g105931d #1
[ 6.896342] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 6.897692] Workqueue: events_unbound async_run_entry_fn
[ 6.898411] task: ffff88001cf28040 task.stack: ffffc900000f0000
[ 6.899202] RIP: 0010:scsi_add_cmd_to_list+0x28/0xb0
[ 6.899868] RSP: 0000:ffffc900000f2fd0 EFLAGS: 00010046
[ 6.900575] RAX: ffff88001ee11868 RBX: 0000000000000000 RCX: 0000000000000000
[ 6.901523] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88001ee11678
[ 6.902478] RBP: ffffc900000f3020 R08: 00000000be1630d2 R09: 0000000000000000
[ 6.903429] R10: ffff88001ee11868 R11: 0000000000000000 R12: ffff88001ee11678
[ 6.904377] R13: ffff88001ee11678 R14: ffff8800149ca2a8 R15: ffffc900000f30e0
[ 6.905121] Creating 1 MTD partitions on "NAND 128MiB 1,8V 8-bit":
[ 6.905129] 0x000000000000-0x000008000000 : "NAND simulator partition 0"
[ 6.907028] FS: 0000000000000000(0000) GS:ffff88001d200000(0000) knlGS:0000000000000000
[ 6.908097] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6.908868] CR2: 0000000000000000 CR3: 0000000002823000 CR4: 00000000000006b0
[ 6.909418] ftl_cs: FTL header not found.
[ 6.910363] Call Trace:
[ 6.910699] scsi_init_command+0x37/0x40
[ 6.911228] scsi_prep_fn+0x67/0x140
[ 6.911719] ? __kmalloc_node+0x119/0x290
[ 6.912267] ? ioc_lookup_icq+0xac/0xe0
[ 6.912782] blk_peek_request+0x1f9/0x370
[ 6.913331] ? scsi_init_rq+0x75/0x100
[ 6.913836] scsi_request_fn+0x8a/0x7d0
[ 6.914362] ? kvm_clock_read+0x25/0x40
[ 6.914879] ? kvm_sched_clock_read+0x9/0x20
[ 6.915458] ? blk_account_io_start+0x2df/0x320
[ 6.916066] ? __lock_release+0x1b7/0x230
[ 6.916610] ? blk_account_io_start+0x2df/0x320
[ 6.917218] ? put_lock_stats+0xe/0x20
[ 6.917728] __blk_run_queue+0xa5/0xc0
[ 6.918242] __elv_add_request+0x1f7/0x330
[ 6.918789] blk_queue_bio+0x4de/0x510
[ 6.919304] ? __lock_release+0x1b7/0x230
[ 6.919840] ? mempool_alloc_slab+0x20/0x30
[ 6.920410] generic_make_request+0xef/0x2c0
[ 6.920981] ? preempt_count_sub+0x63/0x80
[ 6.921540] ? bio_init+0xd/0x40
[ 6.921979] submit_bio+0x118/0x130
[ 6.922456] ? __add_to_page_cache_locked+0x158/0x250
[ 6.923133] ? guard_bio_eod+0x19/0x130
[ 6.923654] submit_bh_wbc+0x10e/0x120
[ 6.924167] submit_bh+0x10/0x20
[ 6.924610] block_read_full_page+0x3d0/0x400
[ 6.925196] ? I_BDEV+0x20/0x20
[ 6.925628] ? add_to_page_cache_lru+0x112/0x130
[ 6.926254] ? alloc_pages_current+0x143/0x160
[ 6.926846] ? ret_from_fork+0x2c/0x40
[ 6.927361] blkdev_readpage+0x18/0x20
[ 6.927866] do_read_cache_page+0xe8/0x370
[ 6.928426] ? init_object+0x88/0xa0
[ 6.928910] ? blkdev_writepages+0x40/0x40
[ 6.929464] ? ___slab_alloc+0x36f/0x3a0
[ 6.929992] ? find_valid_gpt+0x80/0x230
[ 6.930524] ? get_page_from_freelist+0x6e8/0x800
[ 6.931153] ? ___slab_alloc+0x36f/0x3a0
[ 6.931687] ? sched_clock_cpu+0x22/0xe0
[ 6.932216] ? __vmalloc_area_node+0x98/0x210
[ 6.932804] ? kvm_clock_read+0x25/0x40
[ 6.933329] read_cache_page+0x15/0x20
[ 6.933830] read_dev_sector+0x34/0xd0
[ 6.934348] read_lba+0xb4/0x150
[ 6.934783] find_valid_gpt+0x9e/0x230
[ 6.935298] ? find_valid_gpt+0x230/0x230
[ 6.935834] efi_partition+0x6c/0x3d0
[ 6.936339] ? vsnprintf+0xb5/0x410
[ 6.936808] ? snprintf+0x34/0x40
[ 6.937266] ? find_valid_gpt+0x230/0x230
[ 6.937798] check_partition+0x119/0x1e0
[ 6.938335] rescan_partitions+0x8c/0x330
[ 6.938873] __blkdev_get+0x14d/0x390
[ 6.939375] blkdev_get+0x1be/0x1d0
[ 6.939845] register_disk+0xfd/0x160
[ 6.940353] device_add_disk+0xcf/0x130
[ 6.940867] sd_probe_async+0x126/0x1f0
[ 6.941395] async_run_entry_fn+0x4a/0x120
[ 6.941949] ? preempt_count_sub+0x63/0x80
[ 6.942503] process_one_work+0x331/0x5a0
[ 6.943042] ? process_one_work+0x1ee/0x5a0
[ 6.943608] ? sched_clock_cpu+0x22/0xe0
[ 6.944138] ? preempt_count_add+0xe/0x70
[ 6.944682] ? preempt_count_sub+0x16/0x80
[ 6.945240] ? put_lock_stats+0xe/0x20
[ 6.945743] ? __lock_acquired+0x222/0x250
[ 6.946302] worker_thread+0x2c5/0x3e0
[ 6.946806] ? maybe_create_worker+0x100/0x100
[ 6.947411] ? preempt_count_sub+0x63/0x80
[ 6.947963] ? schedule+0x9e/0xb0
[ 6.948419] ? maybe_create_worker+0x100/0x100
[ 6.949013] kthread+0x142/0x150
[ 6.949456] ? __kthread_init_worker+0x80/0x80
[ 6.950053] ret_from_fork+0x2c/0x40
[ 6.950541] Code: 00 00 00 55 48 89 e5 48 83 ec 50 48 89 5d d8 4c 89 65 e0 4c 89 6d e8 4c 89 75 f0 4c 89 7d f8 e8 af de 70 00 48 8b 5f 38 49 89 fc <48> 8b 03 f6 80 01 03 00 00 08 74 61 4c 8d 7b 38 4d 8d 6c 24 40
[ 6.953112] RIP: scsi_add_cmd_to_list+0x28/0xb0 RSP: ffffc900000f2fd0
To reproduce:
git clone https://github.com/01org/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Xiaolong
View attachment "config-4.12.0-rc2-00339-g105931d" of type "text/plain" (113537 bytes)
View attachment "job-script" of type "text/plain" (4128 bytes)
Download attachment "dmesg.xz" of type "application/octet-stream" (12376 bytes)
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