syzbot

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BUG: KCSAN: data-race in __run_timer_base / next_expiry_recalc

write to 0xffff888237d1de58 of 8 bytes by interrupt on cpu 1:
 next_expiry_recalc+0x187/0x1e0 kernel/time/timer.c:1967
 __run_timers kernel/time/timer.c:2414 [inline]
 __run_timer_base+0x2ee/0x640 kernel/time/timer.c:2428
 run_timer_base kernel/time/timer.c:2437 [inline]
 run_timer_softirq+0x31/0x70 kernel/time/timer.c:2447
 handle_softirqs+0xc3/0x280 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0x3e/0x90 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x73/0x80 arch/x86/kernel/apic/apic.c:1043
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
 arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
 acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111
 acpi_idle_do_entry+0x1d/0x30 drivers/acpi/processor_idle.c:568
 acpi_idle_enter+0x96/0xb0 drivers/acpi/processor_idle.c:702
 cpuidle_enter_state+0xcf/0x270 drivers/cpuidle/cpuidle.c:267
 cpuidle_enter+0x40/0x70 drivers/cpuidle/cpuidle.c:388
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:230 [inline]
 do_idle+0x195/0x230 kernel/sched/idle.c:326
 cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:424
 start_secondary+0x94/0xa0 arch/x86/kernel/smpboot.c:313
 common_startup_64+0x12c/0x137

read to 0xffff888237d1de58 of 8 bytes by interrupt on cpu 0:
 __run_timer_base+0x52/0x640 kernel/time/timer.c:2423
 timer_expire_remote+0x2f/0x40 kernel/time/timer.c:2180
 tmigr_handle_remote_cpu kernel/time/timer_migration.c:930 [inline]
 tmigr_handle_remote_up kernel/time/timer_migration.c:1021 [inline]
 __walk_groups kernel/time/timer_migration.c:533 [inline]
 tmigr_handle_remote+0x4f6/0x940 kernel/time/timer_migration.c:1080
 run_timer_softirq+0x5f/0x70 kernel/time/timer.c:2451
 handle_softirqs+0xc3/0x280 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0x3e/0x90 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x73/0x80 arch/x86/kernel/apic/apic.c:1043
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
 decode_watchpoint kernel/kcsan/encoding.h:74 [inline]
 find_watchpoint kernel/kcsan/core.c:132 [inline]
 check_access kernel/kcsan/core.c:737 [inline]
 __tsan_read8+0x31/0x180 kernel/kcsan/core.c:1025
 file_inode include/linux/fs.h:1083 [inline]
 selinux_revalidate_file_permission security/selinux/hooks.c:3616 [inline]
 selinux_file_permission+0x25e/0x360 security/selinux/hooks.c:3643
 security_file_permission+0x43/0x70 security/security.c:2722
 rw_verify_area fs/read_write.c:377 [inline]
 vfs_read+0x133/0x6e0 fs/read_write.c:467
 ksys_read+0xeb/0x1b0 fs/read_write.c:619
 __do_sys_read fs/read_write.c:629 [inline]
 __se_sys_read fs/read_write.c:627 [inline]
 __x64_sys_read+0x42/0x50 fs/read_write.c:627
 x64_sys_call+0x27d3/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:1
 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: 0x0000000100001895 -> 0x0000000100001896

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3249 Comm: syz-executor Not tainted 6.11.0-rc4-syzkaller-00011-g521b1e7f4cf0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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