================================================================== BUG: KCSAN: data-race in perf_event_set_state / perf_event_update_time read to 0xffff888118892200 of 8 bytes by task 13291 on cpu 1: __perf_update_times kernel/events/core.c:628 [inline] perf_event_update_time+0x126/0x1b0 kernel/events/core.c:641 perf_mmap+0xbe8/0xd50 kernel/events/core.c:6650 call_mmap include/linux/fs.h:2107 [inline] mmap_region+0xa5b/0x1620 mm/mmap.c:2886 do_mmap+0x6f9/0xb10 mm/mmap.c:1397 vm_mmap_pgoff+0x133/0x290 mm/util.c:573 ksys_mmap_pgoff+0x292/0x340 mm/mmap.c:1443 x64_sys_call+0x1835/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:10 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 write to 0xffff888118892200 of 8 bytes by task 13292 on cpu 0: perf_event_update_time kernel/events/core.c:641 [inline] perf_event_set_state+0x175/0x3f0 kernel/events/core.c:660 event_sched_in+0xe9/0x6d0 kernel/events/core.c:2538 group_sched_in kernel/events/core.c:2587 [inline] merge_sched_in kernel/events/core.c:3846 [inline] visit_groups_merge+0xbe2/0x1c00 kernel/events/core.c:3791 pmu_groups_sched_in kernel/events/core.c:3873 [inline] ctx_groups_sched_in+0xa0/0x100 kernel/events/core.c:3886 ctx_sched_in+0x217/0x230 kernel/events/core.c:3940 perf_event_sched_in kernel/events/core.c:2683 [inline] perf_event_context_sched_in kernel/events/core.c:3986 [inline] __perf_event_task_sched_in+0x4b5/0x7f0 kernel/events/core.c:4015 perf_event_task_sched_in include/linux/perf_event.h:1473 [inline] finish_task_switch+0x218/0x2b0 kernel/sched/core.c:5277 context_switch kernel/sched/core.c:5411 [inline] __schedule+0x5e8/0x940 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x55/0xc0 kernel/sched/core.c:6837 futex_wait_queue kernel/futex/waitwake.c:370 [inline] __futex_wait+0x141/0x290 kernel/futex/waitwake.c:669 futex_wait+0x99/0x1c0 kernel/futex/waitwake.c:697 do_futex+0x276/0x370 kernel/futex/syscalls.c:102 __do_sys_futex kernel/futex/syscalls.c:179 [inline] __se_sys_futex+0x25d/0x3a0 kernel/futex/syscalls.c:160 __x64_sys_futex+0x78/0x90 kernel/futex/syscalls.c:160 x64_sys_call+0x28c1/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:203 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: 0x0000000000000000 -> 0x00000000000038b6 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 13292 Comm: syz-executor.3 Not tainted 6.10.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 ==================================================================