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Date: Tue, 24 Aug 2021 16:03:07 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Mark Rutland <mark.rutland@....com>
Cc: Peter Zijlstra <peterz@...radead.org>,
LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
lkp@...el.com
Subject: [lockdep] 997acaf6b4:
BUG:KCSAN:data-race_in_ktime_get_update_offsets_now
Greeting,
FYI, we noticed the following commit (built with clang-14):
commit: 997acaf6b4b59c6a9c259740312a69ea549cc684 ("lockdep: report broken irq restoration")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: trinity
version: trinity-i386-4d2343bd-1_20200320
with following parameters:
number: 99999
group: group-01
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 SandyBridge -smp 2 -m 16G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-------------------------------------------------------------------------+------------+------------+
| | 2f0df49c89 | 997acaf6b4 |
+-------------------------------------------------------------------------+------------+------------+
| BUG:KCSAN:data-race_in_mutex_spin_on_owner | 68 | 67 |
| BUG:KCSAN:data-race_in__mutex_lock_common/mutex_spin_on_owner | 63 | 65 |
| BUG:KCSAN:data-race_in_mutex_optimistic_spin | 39 | 48 |
| BUG:KCSAN:data-race_in_timekeeping_get_ns | 68 | |
| BUG:KCSAN:data-race_in__mutex_lock_common/__mutex_lock_common | 5 | 5 |
| BUG:KCSAN:data-race_in_rwsem_spin_on_owner | 25 | 19 |
| BUG:KCSAN:data-race_in_atime_needs_update | 1 | 5 |
| BUG:KCSAN:data-race_in_mix_pool_bytes | 29 | 31 |
| BUG:KCSAN:data-race_in_pids_release | 7 | 6 |
| BUG:KCSAN:data-race_in_start_dir_add/start_dir_add | 14 | 12 |
| BUG:KCSAN:data-race_in__d_add/start_dir_add | 25 | 21 |
| BUG:KCSAN:data-race_in__percpu_counter_compare/percpu_counter_add_batch | 11 | 12 |
| BUG:KCSAN:data-race_in__dentry_kill/lookup_fast | 5 | 2 |
| BUG:KCSAN:data-race_in_crng_slow_load | 4 | 5 |
| BUG:KCSAN:data-race_in__percpu_counter_sum | 1 | |
| BUG:KCSAN:data-race_in_do_raw_write_lock/do_raw_write_unlock | 1 | 1 |
| BUG:KCSAN:data-race_in__dentry_kill/d_set_d_op | 1 | |
| BUG:KCSAN:data-race_in_shmem_getpage_gfp/shmem_write_end | 1 | |
| BUG:KCSAN:data-race_in_ktime_get | 0 | 67 |
| BUG:KCSAN:data-race_in_ktime_get_update_offsets_now | 0 | 67 |
| BUG:KCSAN:data-race_in_ktime_get_ts64 | 0 | 18 |
| BUG:KCSAN:data-race_in__delete_from_page_cache/shmem_getpage_gfp | 0 | 1 |
| BUG:KCSAN:data-race_in_shmem_file_read_iter/shmem_write_end | 0 | 1 |
| BUG:KCSAN:data-race_in_run_timer_softirq/try_to_del_timer_sync | 0 | 1 |
| BUG:KCSAN:data-race_in_tcp_release_cb/tcp_wfree | 0 | 1 |
| BUG:KCSAN:data-race_in_shmem_mknod/vfs_getattr_nosec | 0 | 1 |
| BUG:KCSAN:data-race_in_d_set_d_op/d_wait_lookup | 0 | 1 |
| BUG:KCSAN:data-race_in_task_dump_owner | 0 | 1 |
+-------------------------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 259.911278][ C1] ==================================================================
[ 259.913558][ C1] BUG: KCSAN: data-race in ktime_get_update_offsets_now+0x17c/0x340
[ 259.916091][ C1]
[ 259.917014][ C1] race at unknown origin, with read to 0xffffffffb58593e0 of 8 bytes by interrupt on cpu 1:
[ 259.920212][ C1] ktime_get_update_offsets_now+0x17c/0x340
[ 259.922114][ C1] hrtimer_interrupt+0xa3/0x750
[ 259.923762][ C1] __sysvec_apic_timer_interrupt+0x6f/0x130
[ 259.926033][ C1] asm_call_irq_on_stack+0xf/0x20
[ 259.927825][ C1] sysvec_apic_timer_interrupt+0x6d/0xb0
[ 259.929426][ C1] asm_sysvec_apic_timer_interrupt+0x12/0x20
[ 259.931416][ C1] default_idle+0xe/0x10
[ 259.932925][ C1] default_idle_call+0x4f/0x90
[ 259.934427][ C1] do_idle+0xb6/0x200
[ 259.935939][ C1] cpu_startup_entry+0x14/0x20
[ 259.937490][ C1] secondary_startup_64_no_verify+0xc2/0xcb
[ 259.939450][ C1]
[ 259.940328][ C1] Reported by Kernel Concurrency Sanitizer on:
[ 259.942269][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.11.0-rc2-g997acaf6b4b5 #1
[ 259.945133][ C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 259.947656][ C1] ==================================================================
To reproduce:
# build kernel
cd linux
cp config-5.11.0-rc2-g997acaf6b4b5 .config
make HOSTCC=clang-14 CC=clang-14 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage
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
---
0DAY/LKP+ Test Infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation
Thanks,
Oliver Sang
View attachment "config-5.11.0-rc2-g997acaf6b4b5" of type "text/plain" (140316 bytes)
View attachment "job-script" of type "text/plain" (4239 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (25080 bytes)
View attachment "trinity" of type "text/plain" (19583 bytes)
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