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Date: Thu, 19 Apr 2018 11:01:35 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Dmitry Vyukov <dvyukov@...gle.com>
Cc: Andrey Ryabinin <aryabinin@...tuozzo.com>,
Kefeng Wang <wangkefeng.wang@...wei.com>,
linux-kernel@...r.kernel.org, lkp@...org
Subject: [kcov] watchdog: BUG: soft lockup - CPU#0 stuck for 22s!
[swapper/0:1]
Hello,
FYI this happens in mainline kernel 4.17.0-rc1.
It at least dates back to v4.8 .
[ 25.697463]
[ 25.697463] Start testing find_bit() with random-filled bitmap
[ 25.736615] find_next_bit: 30203201 ns, 163965 iterations
[ 25.783266] find_next_zero_bit: 45554622 ns, 163716 iterations
[ 25.832480] find_last_bit: 48003878 ns, 163965 iterations
[ 52.050031] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [swapper/0:1]
[ 52.050031] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.17.0-rc1 #210
[ 52.050031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 52.050031] RIP: 0010:__sanitizer_cov_trace_pc+0x65/0x66:
__sanitizer_cov_trace_pc at kernel/kcov.c:111
[ 52.050031] RSP: 0000:ffff88000fd43e40 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
[ 52.050031] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000017
[ 52.050031] RDX: 0000000000000000 RSI: ffff88000fd3e000 RDI: 0000000000000002
[ 52.050031] RBP: 0000000000050000 R08: 0000000000000008 R09: 0000000000000000
[ 52.050031] R10: ffff88000fd3e000 R11: 00000000222e2c32 R12: ffffffff85565d90
[ 52.050031] R13: 0000000000030f80 R14: 0000000000030f80 R15: 0000000000000000
[ 52.050031] FS: 0000000000000000(0000) GS:ffff88001f600000(0000) knlGS:0000000000000000
[ 52.050031] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 52.050031] CR2: 0000000000000000 CR3: 0000000003c6a000 CR4: 00000000000006b0
[ 52.050031] Call Trace:
[ 52.050031] find_first_bit+0x66/0x7c:
find_first_bit at lib/find_bit.c:106 (discriminator 1)
[ 52.050031] test_find_first_bit+0x3a/0x93
[ 52.050031] find_bit_test+0x84/0x173:
find_bit_test at lib/find_bit_benchmark.c:135
[ 52.050031] ? test_find_next_and_bit+0x9b/0x9b
[ 52.050031] do_one_initcall+0x18e/0x3df:
do_one_initcall at init/main.c:883
[ 52.050031] ? check_kcov_mode+0x5/0x37:
check_kcov_mode at kernel/kcov.c:60
[ 52.050031] ? __sanitizer_cov_trace_pc+0x2b/0x66:
__sanitizer_cov_trace_pc at kernel/kcov.c:101
[ 52.050031] ? check_kcov_mode+0x5/0x37:
check_kcov_mode at kernel/kcov.c:60
[ 52.050031] kernel_init_freeable+0x250/0x3a5:
do_initcall_level at init/main.c:951
(inlined by) do_initcalls at init/main.c:959
(inlined by) do_basic_setup at init/main.c:977
(inlined by) kernel_init_freeable at init/main.c:1127
[ 52.050031] ? rest_init+0x13a/0x13a:
kernel_init at init/main.c:1050
[ 52.050031] kernel_init+0x17/0x218:
kernel_init at init/main.c:1053
[ 52.050031] ? rest_init+0x13a/0x13a:
kernel_init at init/main.c:1050
[ 52.050031] ret_from_fork+0x35/0x40:
ret_from_fork at arch/x86/entry/entry_64.S:418
[ 52.050031] Code: 1c 00 00 8b 8b 1c 1c 00 00 48 ff 05 d2 2d fd 04 48 8b 02 48 ff c0 48 39 c1 76 0e 48 ff 05 c8 2d fd 04 48 89 2c c2 48 89 02 5b 5d <c3> 48 8b 0c 24 40 0f b6 d6 40 0f b6 f7 31 ff 48 ff 05 e9 2d fd
[ 52.050031] Kernel panic - not syncing: softlockup: hung tasks
[ 52.050031] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G L 4.17.0-rc1 #210
[ 52.050031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 52.050031] Call Trace:
[ 52.050031] <IRQ>
[ 52.050031] dump_stack+0xf3/0x135:
__dump_stack at lib/dump_stack.c:77
(inlined by) dump_stack at lib/dump_stack.c:113
[ 52.050031] panic+0x173/0x440:
panic at kernel/panic.c:195
[ 52.050031] watchdog_timer_fn+0x343/0x382:
watchdog_timer_fn at kernel/watchdog.c:444
[ 52.050031] __hrtimer_run_queues+0x2a0/0x4c3:
__run_hrtimer at kernel/time/hrtimer.c:1386
(inlined by) __hrtimer_run_queues at kernel/time/hrtimer.c:1448
[ 52.050031] hrtimer_run_queues+0xcb/0xed:
hrtimer_run_queues at kernel/time/hrtimer.c:1621
[ 52.050031] run_local_timers+0x2d/0x85:
run_local_timers at kernel/time/timer.c:1704
[ 52.050031] update_process_times+0x30/0x7e:
update_process_times at kernel/time/timer.c:1636
[ 52.050031] tick_nohz_handler+0x141/0x19a:
tick_sched_handle at kernel/time/tick-sched.c:173
(inlined by) tick_nohz_handler at kernel/time/tick-sched.c:1182
[ 52.050031] smp_apic_timer_interrupt+0x1a5/0x2c4:
local_apic_timer_interrupt at arch/x86/kernel/apic/apic.c:1025
(inlined by) smp_apic_timer_interrupt at arch/x86/kernel/apic/apic.c:1050
[ 52.050031] apic_timer_interrupt+0xf/0x20:
apic_timer_interrupt at arch/x86/entry/entry_64.S:863
[ 52.050031] </IRQ>
[ 52.050031] RIP: 0010:__sanitizer_cov_trace_pc+0x65/0x66:
__sanitizer_cov_trace_pc at kernel/kcov.c:111
[ 52.050031] RSP: 0000:ffff88000fd43e40 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
[ 52.050031] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000017
[ 52.050031] RDX: 0000000000000000 RSI: ffff88000fd3e000 RDI: 0000000000000002
[ 52.050031] RBP: 0000000000050000 R08: 0000000000000008 R09: 0000000000000000
[ 52.050031] R10: ffff88000fd3e000 R11: 00000000222e2c32 R12: ffffffff85565d90
[ 52.050031] R13: 0000000000030f80 R14: 0000000000030f80 R15: 0000000000000000
[ 52.050031] find_first_bit+0x66/0x7c:
find_first_bit at lib/find_bit.c:106 (discriminator 1)
[ 52.050031] test_find_first_bit+0x3a/0x93
[ 52.050031] find_bit_test+0x84/0x173:
find_bit_test at lib/find_bit_benchmark.c:135
[ 52.050031] ? test_find_next_and_bit+0x9b/0x9b
[ 52.050031] do_one_initcall+0x18e/0x3df:
do_one_initcall at init/main.c:883
[ 52.050031] ? check_kcov_mode+0x5/0x37:
check_kcov_mode at kernel/kcov.c:60
[ 52.050031] ? __sanitizer_cov_trace_pc+0x2b/0x66:
__sanitizer_cov_trace_pc at kernel/kcov.c:101
[ 52.050031] ? check_kcov_mode+0x5/0x37:
check_kcov_mode at kernel/kcov.c:60
[ 52.050031] kernel_init_freeable+0x250/0x3a5:
do_initcall_level at init/main.c:951
(inlined by) do_initcalls at init/main.c:959
(inlined by) do_basic_setup at init/main.c:977
(inlined by) kernel_init_freeable at init/main.c:1127
[ 52.050031] ? rest_init+0x13a/0x13a:
kernel_init at init/main.c:1050
[ 52.050031] kernel_init+0x17/0x218:
kernel_init at init/main.c:1053
[ 52.050031] ? rest_init+0x13a/0x13a:
kernel_init at init/main.c:1050
[ 52.050031] ret_from_fork+0x35/0x40:
ret_from_fork at arch/x86/entry/entry_64.S:418
[ 52.050031] Kernel Offset: disabled
Attached the full dmesg, kconfig and reproduce scripts.
Thanks,
Fengguang
View attachment "dmesg-vm-intel12-yocto-x86_64-5:20180417140128:x86_64-randconfig-s3-04171327:4.17.0-rc1:210" of type "text/plain" (43369 bytes)
View attachment ".config" of type "text/plain" (112437 bytes)
View attachment "job-script" of type "text/plain" (4090 bytes)
View attachment "reproduce-vm-intel12-yocto-x86_64-5:20180417140128:x86_64-randconfig-s3-04171327:4.17.0-rc1:210" of type "text/plain" (2119 bytes)
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