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Date: Tue, 23 Feb 2016 08:55:03 +0800
From: kernel test robot <ying.huang@...ux.intel.com>
TO: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
CC: Stephen Rothwell <sfr@...b.auug.org.au>
Subject: [lkp] [printk] 34578dc67f: EIP is at vprintk_emit+0x1ea/0x600
FYI, we noticed the below changes on
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit 34578dc67f38c02ccbe696e4099967884caa8e15 ("printk: set may_schedule for some of console_trylock() callers")
+------------------------------------------------+------------+------------+
| | 08e0722e8e | 34578dc67f |
+------------------------------------------------+------------+------------+
| boot_successes | 0 | 0 |
| boot_failures | 98 | 100 |
| BUG:kernel_torture_test_oversize | 98 | 50 |
| EIP_is_at_raw_spin_unlock_irqrestore | 0 | 3 |
| Kernel_panic-not_syncing:softlockup:hung_tasks | 0 | 50 |
| backtrace:of_unittest | 0 | 50 |
| backtrace:kernel_init_freeable | 0 | 50 |
| EIP_is_at_vprintk_emit | 0 | 28 |
| EIP_is_at_lock_acquire | 0 | 5 |
| EIP_is_at_of_unittest_overlay | 0 | 8 |
| EIP_is_at_mutex_lock_nested | 0 | 1 |
| EIP_is_at__mutex_unlock_slowpath | 0 | 2 |
| EIP_is_at_of_overlay_destroy | 0 | 1 |
| EIP_is_at_idr_find_slowpath | 0 | 1 |
| EIP_is_at___might_sleep | 0 | 1 |
+------------------------------------------------+------------+------------+
[ 33.497678] ### dt-test ### of_unittest_destroy_tracked_overlays: overlay destroy failed for #6
[ 33.497693] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [swapper:1]
[ 33.497693] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [swapper:1]
[ 33.497695] Modules linked in:
[ 33.497695] Modules linked in:
[ 33.497696] irq event stamp: 69018756
[ 33.497696] irq event stamp: 69018756
[ 33.497700] hardirqs last enabled at (69018755): [<c068e185>] vprintk_emit+0x1e5/0x600
[ 33.497700] hardirqs last enabled at (69018755): [<c068e185>] vprintk_emit+0x1e5/0x600
[ 33.497704] hardirqs last disabled at (69018756): [<c0a091b8>] apic_timer_interrupt+0x28/0x40
[ 33.497704] hardirqs last disabled at (69018756): [<c0a091b8>] apic_timer_interrupt+0x28/0x40
[ 33.497707] softirqs last enabled at (68988726): [<c064cf32>] __do_softirq+0x312/0x3f0
[ 33.497707] softirqs last enabled at (68988726): [<c064cf32>] __do_softirq+0x312/0x3f0
[ 33.497710] softirqs last disabled at (68988719): [<c0604c7e>] do_softirq_own_stack+0x1e/0x30
[ 33.497710] softirqs last disabled at (68988719): [<c0604c7e>] do_softirq_own_stack+0x1e/0x30
[ 33.497713] CPU: 0 PID: 1 Comm: swapper Not tainted 4.5.0-rc4-00295-g34578dc #1
[ 33.497713] CPU: 0 PID: 1 Comm: swapper Not tainted 4.5.0-rc4-00295-g34578dc #1
[ 33.497714] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 33.497714] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 33.497715] task: b0058000 ti: b0060000 task.ti: b0060000
[ 33.497715] task: b0058000 ti: b0060000 task.ti: b0060000
[ 33.497716] EIP: 0060:[<c068e18a>] EFLAGS: 00000246 CPU: 0
[ 33.497716] EIP: 0060:[<c068e18a>] EFLAGS: 00000246 CPU: 0
[ 33.497718] EIP is at vprintk_emit+0x1ea/0x600
[ 33.497718] EIP is at vprintk_emit+0x1ea/0x600
[ 33.497719] EAX: 00000246 EBX: 00000053 ECX: 00000000 EDX: 00000001
[ 33.497719] EAX: 00000246 EBX: 00000053 ECX: 00000000 EDX: 00000001
[ 33.497720] ESI: 00000006 EDI: 00000000 EBP: b0061e4c ESP: b0061e1c
[ 33.497720] ESI: 00000006 EDI: 00000000 EBP: b0061e4c ESP: b0061e1c
[ 33.497721] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
[ 33.497721] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
[ 33.497722] CR0: 8005003b CR2: 00000000 CR3: 10e3d000 CR4: 00000690
[ 33.497722] CR0: 8005003b CR2: 00000000 CR3: 10e3d000 CR4: 00000690
[ 33.497726] Stack:
[ 33.497726] Stack:
[ 33.497730] 00000000 00000000 00000000 00000000 c15d9462 00000053 c15d9462 00000000
[ 33.497730] 00000000 00000000 00000000 00000000 c15d9462 00000053 c15d9462 00000000
[ 33.497734] 00000246 00000006 00000001 00000000 b0061e6c c068e712 00000000 00000004
[ 33.497734] 00000246 00000006 00000001 00000000 b0061e6c c068e712 00000000 00000004
[ 33.497737] 00000000 00000000 c0bcf58c b0061e80 b0061e74 c06fdf6e b0061ea4 c0df5eec
[ 33.497737] 00000000 00000000 c0bcf58c b0061e80 b0061e74 c06fdf6e b0061ea4 c0df5eec
[ 33.497738] Call Trace:
[ 33.497738] Call Trace:
[ 33.497741] [<c068e712>] vprintk_default+0x32/0x40
[ 33.497741] [<c068e712>] vprintk_default+0x32/0x40
[ 33.497744] [<c06fdf6e>] printk+0x11/0x13
[ 33.497744] [<c06fdf6e>] printk+0x11/0x13
[ 33.497748] [<c0df5eec>] of_unittest_overlay+0x8d1/0x900
[ 33.497748] [<c0df5eec>] of_unittest_overlay+0x8d1/0x900
[ 33.497750] [<c0df6b1f>] of_unittest+0xc04/0xc2d
[ 33.497750] [<c0df6b1f>] of_unittest+0xc04/0xc2d
[ 33.497753] [<c067f29b>] ? trace_hardirqs_on+0xb/0x10
[ 33.497753] [<c067f29b>] ? trace_hardirqs_on+0xb/0x10
[ 33.497756] [<c099fda9>] ? add_sysfs_fw_map_entry+0x3c/0x7d
[ 33.497756] [<c099fda9>] ? add_sysfs_fw_map_entry+0x3c/0x7d
[ 33.497758] [<c0600433>] ? do_one_initcall+0x73/0x1d0
[ 33.497758] [<c0600433>] ? do_one_initcall+0x73/0x1d0
[ 33.497760] [<c0df5f1b>] ? of_unittest_overlay+0x900/0x900
[ 33.497760] [<c0df5f1b>] ? of_unittest_overlay+0x900/0x900
[ 33.497761] [<c060043e>] do_one_initcall+0x7e/0x1d0
[ 33.497761] [<c060043e>] do_one_initcall+0x7e/0x1d0
[ 33.497763] [<c0df5f1b>] ? of_unittest_overlay+0x900/0x900
[ 33.497763] [<c0df5f1b>] ? of_unittest_overlay+0x900/0x900
[ 33.497765] [<c0664def>] ? parse_args+0x24f/0x440
[ 33.497765] [<c0664def>] ? parse_args+0x24f/0x440
[ 33.497767] [<c067f29b>] ? trace_hardirqs_on+0xb/0x10
[ 33.497767] [<c067f29b>] ? trace_hardirqs_on+0xb/0x10
[ 33.497770] [<c0dc4b30>] ? kernel_init_freeable+0xc3/0x15b
[ 33.497770] [<c0dc4b30>] ? kernel_init_freeable+0xc3/0x15b
[ 33.497771] [<c0dc4b4d>] kernel_init_freeable+0xe0/0x15b
[ 33.497771] [<c0dc4b4d>] kernel_init_freeable+0xe0/0x15b
[ 33.497773] [<c0a014bb>] kernel_init+0xb/0xe0
[ 33.497773] [<c0a014bb>] kernel_init+0xb/0xe0
[ 33.497776] [<c066e17c>] ? schedule_tail+0xc/0x50
[ 33.497776] [<c066e17c>] ? schedule_tail+0xc/0x50
[ 33.497778] [<c0a088a0>] ret_from_kernel_thread+0x20/0x40
[ 33.497778] [<c0a088a0>] ret_from_kernel_thread+0x20/0x40
[ 33.497779] [<c0a014b0>] ? rest_init+0x110/0x110
[ 33.497779] [<c0a014b0>] ? rest_init+0x110/0x110
[ 33.497804] Code: 00 8d 40 ff 80 b8 60 94 5d c1 0a 0f 85 d0 fe ff ff 89 c3 be 02 00 00 00 e9 c6 fe ff ff 8d 74 26 00 e8 0b 11 ff ff 8b 45 f0 50 9d <8d> 74 26 00 80 7d ef 00 0f 85 7e ff ff ff e8 73 ce fe ff e8 fe
[ 33.497804] Code: 00 8d 40 ff 80 b8 60 94 5d c1 0a 0f 85 d0 fe ff ff 89 c3 be 02 00 00 00 e9 c6 fe ff ff 8d 74 26 00 e8 0b 11 ff ff 8b 45 f0 50 9d <8d> 74 26 00 80 7d ef 00 0f 85 7e ff ff ff e8 73 ce fe ff e8 fe
[ 33.497805] Kernel panic - not syncing: softlockup: hung tasks
[ 33.497805] Kernel panic - not syncing: softlockup: hung tasks
[ 33.497807] CPU: 0 PID: 1 Comm: swapper Tainted: G L 4.5.0-rc4-00295-g34578dc #1
[ 33.497807] CPU: 0 PID: 1 Comm: swapper Tainted: G L 4.5.0-rc4-00295-g34578dc #1
[ 33.497808] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 33.497808] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 33.497812] b0058000 b0061cf8 c07c681d b0061d10 c06fdaf6 b0058000 00000017 b0058000
[ 33.497812] b0058000 b0061cf8 c07c681d b0061d10 c06fdaf6 b0058000 00000017 b0058000
[ 33.497815] 00000000 b0061d40 c06c11cd c0b7dd9b 00000000 00000017 b0058298 00000001
[ 33.497815] 00000000 b0061d40 c06c11cd c0b7dd9b 00000000 00000017 b0058298 00000001
[ 33.497819] b0061de0 00000008 c0d799a0 c0d760c0 7fffffff b0061d7c c069b960 00000000
[ 33.497819] b0061de0 00000008 c0d799a0 c0d760c0 7fffffff b0061d7c c069b960 00000000
[ 33.497819] Call Trace:
[ 33.497819] Call Trace:
[ 33.497821] [<c07c681d>] dump_stack+0x16/0x19
[ 33.497821] [<c07c681d>] dump_stack+0x16/0x19
[ 33.497823] [<c06fdaf6>] panic+0x85/0x190
[ 33.497823] [<c06fdaf6>] panic+0x85/0x190
[ 33.497825] [<c06c11cd>] watchdog_timer_fn+0x1ad/0x1b0
[ 33.497825] [<c06c11cd>] watchdog_timer_fn+0x1ad/0x1b0
[ 33.497828] [<c069b960>] hrtimer_run_queues+0x140/0x4a0
[ 33.497828] [<c069b960>] hrtimer_run_queues+0x140/0x4a0
[ 33.497829] [<c06c1020>] ? watchdog+0x40/0x40
[ 33.497829] [<c06c1020>] ? watchdog+0x40/0x40
[ 33.497831] [<c069aa9b>] update_process_times+0x1b/0x50
[ 33.497831] [<c069aa9b>] update_process_times+0x1b/0x50
[ 33.497834] [<c06ab364>] tick_periodic+0x34/0xd0
[ 33.497834] [<c06ab364>] tick_periodic+0x34/0xd0
[ 33.497836] [<c06ab454>] ? tick_handle_periodic+0x14/0x60
[ 33.497836] [<c06ab454>] ? tick_handle_periodic+0x14/0x60
[ 33.497837] [<c06ab454>] tick_handle_periodic+0x14/0x60
[ 33.497837] [<c06ab454>] tick_handle_periodic+0x14/0x60
[ 33.497841] [<c0630b20>] local_apic_timer_interrupt+0x20/0x50
[ 33.497841] [<c0630b20>] local_apic_timer_interrupt+0x20/0x50
[ 33.497843] [<c06312cc>] smp_apic_timer_interrupt+0x2c/0x40
[ 33.497843] [<c06312cc>] smp_apic_timer_interrupt+0x2c/0x40
[ 33.497844] [<c0a091bf>] apic_timer_interrupt+0x2f/0x40
[ 33.497844] [<c0a091bf>] apic_timer_interrupt+0x2f/0x40
[ 33.497846] [<c068e18a>] ? vprintk_emit+0x1ea/0x600
[ 33.497846] [<c068e18a>] ? vprintk_emit+0x1ea/0x600
[ 33.497848] [<c068e712>] vprintk_default+0x32/0x40
[ 33.497848] [<c068e712>] vprintk_default+0x32/0x40
[ 33.497850] [<c06fdf6e>] printk+0x11/0x13
[ 33.497850] [<c06fdf6e>] printk+0x11/0x13
[ 33.497852] [<c0df5eec>] of_unittest_overlay+0x8d1/0x900
[ 33.497852] [<c0df5eec>] of_unittest_overlay+0x8d1/0x900
[ 33.497854] [<c0df6b1f>] of_unittest+0xc04/0xc2d
[ 33.497854] [<c0df6b1f>] of_unittest+0xc04/0xc2d
[ 33.497855] [<c067f29b>] ? trace_hardirqs_on+0xb/0x10
[ 33.497855] [<c067f29b>] ? trace_hardirqs_on+0xb/0x10
[ 33.497857] [<c099fda9>] ? add_sysfs_fw_map_entry+0x3c/0x7d
[ 33.497857] [<c099fda9>] ? add_sysfs_fw_map_entry+0x3c/0x7d
[ 33.497859] [<c0600433>] ? do_one_initcall+0x73/0x1d0
[ 33.497859] [<c0600433>] ? do_one_initcall+0x73/0x1d0
[ 33.497861] [<c0df5f1b>] ? of_unittest_overlay+0x900/0x900
[ 33.497861] [<c0df5f1b>] ? of_unittest_overlay+0x900/0x900
[ 33.497862] [<c060043e>] do_one_initcall+0x7e/0x1d0
[ 33.497862] [<c060043e>] do_one_initcall+0x7e/0x1d0
[ 33.497864] [<c0df5f1b>] ? of_unittest_overlay+0x900/0x900
[ 33.497864] [<c0df5f1b>] ? of_unittest_overlay+0x900/0x900
[ 33.497866] [<c0664def>] ? parse_args+0x24f/0x440
[ 33.497866] [<c0664def>] ? parse_args+0x24f/0x440
[ 33.497867] [<c067f29b>] ? trace_hardirqs_on+0xb/0x10
[ 33.497867] [<c067f29b>] ? trace_hardirqs_on+0xb/0x10
[ 33.497869] [<c0dc4b30>] ? kernel_init_freeable+0xc3/0x15b
[ 33.497869] [<c0dc4b30>] ? kernel_init_freeable+0xc3/0x15b
[ 33.497871] [<c0dc4b4d>] kernel_init_freeable+0xe0/0x15b
[ 33.497871] [<c0dc4b4d>] kernel_init_freeable+0xe0/0x15b
[ 33.497872] [<c0a014bb>] kernel_init+0xb/0xe0
[ 33.497872] [<c0a014bb>] kernel_init+0xb/0xe0
[ 33.497874] [<c066e17c>] ? schedule_tail+0xc/0x50
[ 33.497874] [<c066e17c>] ? schedule_tail+0xc/0x50
[ 33.497876] [<c0a088a0>] ret_from_kernel_thread+0x20/0x40
[ 33.497876] [<c0a088a0>] ret_from_kernel_thread+0x20/0x40
[ 33.497877] [<c0a014b0>] ? rest_init+0x110/0x110
[ 33.497877] [<c0a014b0>] ? rest_init+0x110/0x110
[ 33.497881] Kernel Offset: 0xf600000 from 0xb1000000 (relocation range: 0xb0000000-0xc47dffff)
[ 33.497881] Kernel Offset: 0xf600000 from 0xb1000000 (relocation range: 0xb0000000-0xc47dffff)
Thanks,
Ying Huang
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