================================================================== BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu write to 0xffff888237c197e0 of 8 bytes by interrupt on cpu 0: hrtimer_interrupt+0x1fb/0xaf0 kernel/time/hrtimer.c:1803 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 _raw_spin_unlock_irqrestore+0x34/0x40 kernel/locking/spinlock.c:195 spin_unlock_irqrestore include/linux/spinlock.h:418 [inline] mix_pool_bytes+0x5d/0xe0 drivers/char/random.c:598 write_pool+0x2a9/0x320 drivers/char/random.c:1884 random_ioctl+0x103/0x3a0 drivers/char/random.c:1931 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:860 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888237c197e0 of 8 bytes by task 7387 on cpu 1: print_cpu+0x32e/0x690 kernel/time/timer_list.c:133 timer_list_show+0x114/0x180 kernel/time/timer_list.c:291 seq_read_iter+0x60b/0x930 fs/seq_file.c:272 proc_reg_read_iter+0xfc/0x170 fs/proc/inode.c:300 call_read_iter include/linux/fs.h:2157 [inline] generic_file_splice_read+0x24f/0x330 fs/splice.c:311 do_splice_to fs/splice.c:796 [inline] splice_direct_to_actor+0x2aa/0x650 fs/splice.c:870 do_splice_direct+0x106/0x190 fs/splice.c:979 do_sendfile+0x63e/0xbb0 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1314 [inline] __se_sys_sendfile64 fs/read_write.c:1300 [inline] __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1300 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x0000001970694a87 -> 0x00000019706998a7 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 7387 Comm: syz-executor.0 Not tainted 5.15.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================