================================================================== BUG: KCSAN: data-race in __ep_eventpoll_poll / wakeup_source_report_event write to 0xffff888132681178 of 1 bytes by interrupt on cpu 0: wakeup_source_activate drivers/base/power/wakeup.c:565 [inline] wakeup_source_report_event+0xd6/0x280 drivers/base/power/wakeup.c:590 __pm_stay_awake+0x34/0x70 drivers/base/power/wakeup.c:611 ep_pm_stay_awake_rcu fs/eventpoll.c:727 [inline] ep_poll_callback+0x1f6/0x550 fs/eventpoll.c:1243 __wake_up_common kernel/sched/wait.c:89 [inline] __wake_up_common_lock kernel/sched/wait.c:106 [inline] __wake_up+0x66/0xb0 kernel/sched/wait.c:127 ep_poll_safewake fs/eventpoll.c:661 [inline] ep_poll_callback+0x3d6/0x550 fs/eventpoll.c:1273 __wake_up_common kernel/sched/wait.c:89 [inline] __wake_up_common_lock kernel/sched/wait.c:106 [inline] __wake_up+0x66/0xb0 kernel/sched/wait.c:127 bpf_ringbuf_notify+0x22/0x30 kernel/bpf/ringbuf.c:155 irq_work_single kernel/irq_work.c:221 [inline] irq_work_run_list kernel/irq_work.c:252 [inline] irq_work_run+0xe2/0x2d0 kernel/irq_work.c:261 __sysvec_irq_work+0x22/0x170 arch/x86/kernel/irq_work.c:22 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0x66/0x80 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 __wrmsrq arch/x86/include/asm/msr.h:80 [inline] native_write_msr arch/x86/include/asm/msr.h:137 [inline] wrmsrq arch/x86/include/asm/msr.h:199 [inline] native_apic_msr_write+0x3d/0x60 arch/x86/include/asm/apic.h:212 apic_write arch/x86/include/asm/apic.h:405 [inline] x2apic_send_IPI_self+0x10/0x20 arch/x86/kernel/apic/x2apic_phys.c:107 __apic_send_IPI_self arch/x86/include/asm/apic.h:455 [inline] arch_irq_work_raise+0x46/0x50 arch/x86/kernel/irq_work.c:31 irq_work_raise kernel/irq_work.c:84 [inline] __irq_work_queue_local+0x10f/0x2c0 kernel/irq_work.c:112 irq_work_queue+0x70/0x100 kernel/irq_work.c:124 bpf_ringbuf_commit kernel/bpf/ringbuf.c:-1 [inline] ____bpf_ringbuf_discard kernel/bpf/ringbuf.c:525 [inline] bpf_ringbuf_discard+0xd3/0xf0 kernel/bpf/ringbuf.c:523 bpf_prog_fe0ed97373b08409+0x4b/0x4f bpf_dispatcher_nop_func include/linux/bpf.h:1322 [inline] __bpf_prog_run include/linux/filter.h:718 [inline] bpf_prog_run include/linux/filter.h:725 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2258 [inline] bpf_trace_run3+0x10f/0x1d0 kernel/trace/bpf_trace.c:2300 __traceiter_kmem_cache_free+0x35/0x60 include/trace/events/kmem.h:114 __do_trace_kmem_cache_free include/trace/events/kmem.h:114 [inline] trace_kmem_cache_free include/trace/events/kmem.h:114 [inline] kmem_cache_free+0x257/0x300 mm/slub.c:4744 __io_req_caches_free+0x69/0x170 io_uring/io_uring.c:2710 io_queue_deferred+0x1e/0x220 io_uring/io_uring.c:542 __io_submit_flush_completions+0x9f5/0xa00 io_uring/io_uring.c:1488 io_submit_flush_completions io_uring/io_uring.h:163 [inline] ctx_flush_and_put+0x9b/0x150 io_uring/io_uring.c:1039 io_handle_tw_list+0x1a9/0x1c0 io_uring/io_uring.c:1079 tctx_task_work_run+0x6d/0x1a0 io_uring/io_uring.c:1132 tctx_task_work+0x3f/0x80 io_uring/io_uring.c:1150 task_work_run+0x131/0x1a0 kernel/task_work.c:227 get_signal+0xe13/0xf70 kernel/signal.c:2807 arch_do_signal_or_restart+0x96/0x480 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x7a/0x100 kernel/entry/common.c:111 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x1d6/0x200 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff888132681178 of 1 bytes by task 19578 on cpu 1: __ep_eventpoll_poll+0x1de/0x4e0 fs/eventpoll.c:958 ep_eventpoll_poll+0x1f/0x30 fs/eventpoll.c:1032 vfs_poll include/linux/poll.h:82 [inline] select_poll_one fs/select.c:480 [inline] do_select+0x8ee/0xf50 fs/select.c:536 core_sys_select+0x3d7/0x6e0 fs/select.c:677 do_pselect fs/select.c:759 [inline] __do_sys_pselect6 fs/select.c:802 [inline] __se_sys_pselect6+0x216/0x280 fs/select.c:793 __x64_sys_pselect6+0x78/0x90 fs/select.c:793 x64_sys_call+0x1caa/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:271 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 19578 Comm: syz.2.5156 Tainted: G W 6.16.0-rc5-syzkaller-00038-g733923397fd9 #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 ==================================================================