================================================================== BUG: KCSAN: data-race in internal_add_timer / update_process_times write to 0xffff888237c176d8 of 8 bytes by interrupt on cpu 1: enqueue_timer kernel/time/timer.c:598 [inline] internal_add_timer+0x14f/0x280 kernel/time/timer.c:611 add_timer_on+0x262/0x2a0 kernel/time/timer.c:1182 clocksource_watchdog+0xa74/0xac0 kernel/time/clocksource.c:478 call_timer_fn+0x2e/0x1d0 kernel/time/timer.c:1421 expire_timers+0x135/0x240 kernel/time/timer.c:1466 __run_timers+0x368/0x430 kernel/time/timer.c:1734 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1747 __do_softirq+0x12c/0x26e kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu kernel/softirq.c:636 [inline] irq_exit_rcu+0x4e/0xa0 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x69/0x80 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 xas_not_node include/linux/xarray.h:1444 [inline] xas_next_entry include/linux/xarray.h:1632 [inline] next_map_page mm/filemap.c:3281 [inline] filemap_map_pages+0x60d/0x880 mm/filemap.c:3337 do_fault_around mm/memory.c:4152 [inline] do_read_fault mm/memory.c:4167 [inline] do_fault mm/memory.c:4301 [inline] handle_pte_fault mm/memory.c:4559 [inline] __handle_mm_fault mm/memory.c:4694 [inline] handle_mm_fault+0xb08/0x1580 mm/memory.c:4792 do_user_addr_fault+0x609/0xbe0 arch/x86/mm/fault.c:1397 handle_page_fault arch/x86/mm/fault.c:1485 [inline] exc_page_fault+0x91/0x220 arch/x86/mm/fault.c:1541 asm_exc_page_fault+0x1e/0x30 read to 0xffff888237c176d8 of 8 bytes by interrupt on cpu 0: run_local_timers kernel/time/timer.c:1761 [inline] update_process_times+0x8c/0x150 kernel/time/timer.c:1784 tick_sched_handle kernel/time/tick-sched.c:226 [inline] tick_sched_timer+0x191/0x210 kernel/time/tick-sched.c:1421 __run_hrtimer+0x160/0x480 kernel/time/hrtimer.c:1685 __hrtimer_run_queues kernel/time/hrtimer.c:1749 [inline] hrtimer_interrupt+0x380/0xaf0 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0x6f/0x1c0 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x64/0x80 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 kcsan_setup_watchpoint+0x94/0x3f0 kernel/kcsan/core.c:437 vma_pages include/linux/mm.h:2749 [inline] do_fault_around mm/memory.c:4142 [inline] do_read_fault mm/memory.c:4167 [inline] do_fault mm/memory.c:4301 [inline] handle_pte_fault mm/memory.c:4559 [inline] __handle_mm_fault mm/memory.c:4694 [inline] handle_mm_fault+0x762/0x1580 mm/memory.c:4792 do_user_addr_fault+0x609/0xbe0 arch/x86/mm/fault.c:1397 handle_page_fault arch/x86/mm/fault.c:1485 [inline] exc_page_fault+0x91/0x220 arch/x86/mm/fault.c:1541 asm_exc_page_fault+0x1e/0x30 value changed: 0x0000000100038f00 -> 0x0000000100038e5b Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 25431 Comm: modprobe Not tainted 5.15.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== sd 0:0:1:0: tag#5546 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK cmd_age=0s sd 0:0:1:0: tag#5546 CDB: opcode=0xe5 (vendor) sd 0:0:1:0: tag#5546 CDB[00]: e5 f4 32 73 2f 4e 09 6d 26 e2 c7 35 d1 35 12 1c sd 0:0:1:0: tag#5546 CDB[10]: 92 1b da 40 b8 58 5b a8 d4 7d 34 f3 90 4c f1 2d sd 0:0:1:0: tag#5546 CDB[20]: ba sd 0:0:1:0: tag#5547 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK cmd_age=0s sd 0:0:1:0: tag#5547 CDB: opcode=0xe5 (vendor) sd 0:0:1:0: tag#5547 CDB[00]: e5 f4 32 73 2f 4e 09 6d 26 e2 c7 35 d1 35 12 1c sd 0:0:1:0: tag#5547 CDB[10]: 92 1b da 40 b8 58 5b a8 d4 7d 34 f3 90 4c f1 2d sd 0:0:1:0: tag#5547 CDB[20]: ba sd 0:0:1:0: tag#5551 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK cmd_age=0s sd 0:0:1:0: tag#5551 CDB: opcode=0xe5 (vendor) sd 0:0:1:0: tag#5551 CDB[00]: e5 f4 32 73 2f 4e 09 6d 26 e2 c7 35 d1 35 12 1c sd 0:0:1:0: tag#5551 CDB[10]: 92 1b da 40 b8 58 5b a8 d4 7d 34 f3 90 4c f1 2d sd 0:0:1:0: tag#5551 CDB[20]: ba sd 0:0:1:0: tag#5552 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK cmd_age=0s sd 0:0:1:0: tag#5552 CDB: opcode=0xe5 (vendor) sd 0:0:1:0: tag#5552 CDB[00]: e5 f4 32 73 2f 4e 09 6d 26 e2 c7 35 d1 35 12 1c sd 0:0:1:0: tag#5552 CDB[10]: 92 1b da 40 b8 58 5b a8 d4 7d 34 f3 90 4c f1 2d sd 0:0:1:0: tag#5552 CDB[20]: ba sd 0:0:1:0: tag#5553 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK cmd_age=0s sd 0:0:1:0: tag#5553 CDB: opcode=0xe5 (vendor) sd 0:0:1:0: tag#5553 CDB[00]: e5 f4 32 73 2f 4e 09 6d 26 e2 c7 35 d1 35 12 1c sd 0:0:1:0: tag#5553 CDB[10]: 92 1b da 40 b8 58 5b a8 d4 7d 34 f3 90 4c f1 2d sd 0:0:1:0: tag#5553 CDB[20]: ba sd 0:0:1:0: tag#5555 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK cmd_age=0s sd 0:0:1:0: tag#5555 CDB: opcode=0xe5 (vendor) sd 0:0:1:0: tag#5555 CDB[00]: e5 f4 32 73 2f 4e 09 6d 26 e2 c7 35 d1 35 12 1c sd 0:0:1:0: tag#5555 CDB[10]: 92 1b da 40 b8 58 5b a8 d4 7d 34 f3 90 4c f1 2d sd 0:0:1:0: tag#5555 CDB[20]: ba