syzbot

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BUG: KCSAN: assert: race in __block_task kernel/sched/sched.h:2770 [inline]
BUG: KCSAN: assert: race in dequeue_entities+0x6df/0x760 kernel/sched/fair.c:7177

race at unknown origin, with assert no writes to 0xffff888103062168 of 4 bytes by task 5213 on cpu 1:
 __block_task kernel/sched/sched.h:2770 [inline]
 dequeue_entities+0x6df/0x760 kernel/sched/fair.c:7177
 pick_next_entity kernel/sched/fair.c:5627 [inline]
 pick_task_fair kernel/sched/fair.c:8856 [inline]
 pick_next_task_fair+0x7d/0x410 kernel/sched/fair.c:8876
 __pick_next_task kernel/sched/core.c:5955 [inline]
 pick_next_task kernel/sched/core.c:6477 [inline]
 __schedule+0x284/0x940 kernel/sched/core.c:6629
 __schedule_loop kernel/sched/core.c:6752 [inline]
 schedule+0x55/0xc0 kernel/sched/core.c:6767
 do_nanosleep+0xa3/0x300 kernel/time/hrtimer.c:2032
 hrtimer_nanosleep+0xc4/0x1c0 kernel/time/hrtimer.c:2080
 common_nsleep+0x68/0x90 kernel/time/posix-timers.c:1365
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1411 [inline]
 __se_sys_clock_nanosleep+0x20a/0x240 kernel/time/posix-timers.c:1388
 __x64_sys_clock_nanosleep+0x55/0x70 kernel/time/posix-timers.c:1388
 x64_sys_call+0x253f/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:231
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 5213 Comm: syz.2.471 Tainted: G        W          6.11.0-syzkaller-11728-gad46e8f95e93 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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