[moderation] [kernel?] KCSAN: data-race in next_expiry_recalc / update_process_times

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: f6cef5f8c37f Merge tag 'i3c/for-6.9' of git://git.kernel.o..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12bbd2c9180000
kernel config: https://syzkaller.appspot.com/x/.config?x=8c3c081f20b130f6
dashboard link: https://syzkaller.appspot.com/bug?extid=bd8e292fa022f9ff2e9f
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [jst...@google.com linux-...@vger.kernel.org sb...@kernel.org tg...@linutronix.de]

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/aedbebda3898/disk-f6cef5f8.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6fb1ed41e8cc/vmlinux-f6cef5f8.xz
kernel image: https://storage.googleapis.com/syzbot-assets/30502ff70726/bzImage-f6cef5f8.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+bd8e29...@syzkaller.appspotmail.com

==================================================================
BUG: KCSAN: data-race in next_expiry_recalc / update_process_times

write to 0xffff888237c1ded8 of 8 bytes by interrupt on cpu 1:
next_expiry_recalc+0x187/0x1e0 kernel/time/timer.c:1967
__run_timers kernel/time/timer.c:2405 [inline]
__run_timer_base+0x2ee/0x640 kernel/time/timer.c:2419
timer_expire_remote+0x2f/0x40 kernel/time/timer.c:2180
tmigr_handle_remote_cpu kernel/time/timer_migration.c:908 [inline]
tmigr_handle_remote_up kernel/time/timer_migration.c:1000 [inline]
__walk_groups kernel/time/timer_migration.c:488 [inline]
tmigr_handle_remote+0x4be/0x8e0 kernel/time/timer_migration.c:1054
run_timer_softirq+0x5f/0x70 kernel/time/timer.c:2442
__do_softirq+0xc8/0x285 kernel/softirq.c:554
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:633 [inline]
irq_exit_rcu+0x3c/0x90 kernel/softirq.c:645
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x73/0x80 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
io_cqring_do_overflow_flush io_uring/io_uring.c:723 [inline]
io_cqring_wait io_uring/io_uring.c:2669 [inline]
__do_sys_io_uring_enter io_uring/io_uring.c:3701 [inline]
__se_sys_io_uring_enter+0x14f3/0x18e0 io_uring/io_uring.c:3591
__x64_sys_io_uring_enter+0x78/0x90 io_uring/io_uring.c:3591
do_syscall_64+0xd3/0x1d0
entry_SYSCALL_64_after_hwframe+0x6d/0x75

read to 0xffff888237c1ded8 of 8 bytes by interrupt on cpu 0:
run_local_timers kernel/time/timer.c:2457 [inline]
update_process_times+0x8a/0x180 kernel/time/timer.c:2475
tick_sched_handle kernel/time/tick-sched.c:273 [inline]
tick_nohz_handler+0x250/0x2d0 kernel/time/tick-sched.c:294
__run_hrtimer kernel/time/hrtimer.c:1692 [inline]
__hrtimer_run_queues+0x214/0x5e0 kernel/time/hrtimer.c:1756
hrtimer_interrupt+0x210/0x7b0 kernel/time/hrtimer.c:1818
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x5c/0x1a0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x6e/0x80 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112
acpi_idle_do_entry+0x1d/0x30 drivers/acpi/processor_idle.c:573
acpi_idle_enter+0x96/0xb0 drivers/acpi/processor_idle.c:707
cpuidle_enter_state+0xcf/0x270 drivers/cpuidle/cpuidle.c:267
cpuidle_enter+0x40/0x70 drivers/cpuidle/cpuidle.c:388
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x195/0x230 kernel/sched/idle.c:332
cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:430
rest_init+0xef/0xf0 init/main.c:732
start_kernel+0x57c/0x5e0 init/main.c:1074
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:509
x86_64_start_kernel+0x94/0xa0 arch/x86/kernel/head64.c:490
common_startup_64+0x12c/0x137

value changed: 0x000000010000a93a -> 0x000000010000a93c

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 6.8.0-syzkaller-11409-gf6cef5f8c37f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
==================================================================


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.