[moderation] [kernel?] KCSAN: data-race in tick_nohz_highres_handler / tick_nohz_next_event

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 5e3f5b81de80 Merge tag 'net-6.7-rc5' of git://git.kernel.o..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1092b52ee80000
kernel config: https://syzkaller.appspot.com/x/.config?x=ac34c1f29a8029df
dashboard link: https://syzkaller.appspot.com/bug?extid=994f06249d6c05d7376d
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [fred...@kernel.org linux-...@vger.kernel.org mi...@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/8894c209e25f/disk-5e3f5b81.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/42757ce1a7da/vmlinux-5e3f5b81.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a3314e0b4681/bzImage-5e3f5b81.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+994f06...@syzkaller.appspotmail.com

==================================================================
BUG: KCSAN: data-race in tick_nohz_highres_handler / tick_nohz_next_event

write to 0xffffffff85f1a370 of 4 bytes by interrupt on cpu 1:
tick_sched_do_timer kernel/time/tick-sched.c:205 [inline]
tick_nohz_highres_handler+0x2ad/0x2c0 kernel/time/tick-sched.c:1509
__run_hrtimer kernel/time/hrtimer.c:1688 [inline]
__hrtimer_run_queues+0x217/0x700 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x20d/0x7b0 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
__sysvec_apic_timer_interrupt+0x52/0x190 arch/x86/kernel/apic/apic.c:1082
sysvec_apic_timer_interrupt+0x31/0x80 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649

read to 0xffffffff85f1a370 of 4 bytes by task 0 on cpu 0:
tick_nohz_next_event+0x1d1/0x290 kernel/time/tick-sched.c:869
tick_nohz_get_sleep_length+0x134/0x2c0 kernel/time/tick-sched.c:1261
menu_select+0x81a/0x1060 drivers/cpuidle/governors/menu.c:286
cpuidle_select+0x41/0x50 drivers/cpuidle/cpuidle.c:359
cpuidle_idle_call kernel/sched/idle.c:208 [inline]
do_idle+0x160/0x230 kernel/sched/idle.c:282
cpu_startup_entry+0x24/0x30 kernel/sched/idle.c:380
rest_init+0xf3/0x100 init/main.c:730
arch_call_rest_init+0x9/0x10 init/main.c:827
start_kernel+0x57d/0x5d0 init/main.c:1072
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:555
x86_64_start_kernel+0x94/0xa0 arch/x86/kernel/head64.c:536
secondary_startup_64_no_verify+0x167/0x16b

value changed: 0xffffffff -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.7.0-rc4-syzkaller-00111-g5e3f5b81de80 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
==================================================================


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[syzbot]

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