================================================================== BUG: KCSAN: data-race in hrtimer_reprogram / print_cpu write to 0xffff888237d1f3e0 of 8 bytes by task 31060 on cpu 1: __hrtimer_reprogram kernel/time/hrtimer.c:661 [inline] hrtimer_reprogram+0x1a8/0x220 kernel/time/hrtimer.c:868 hrtimer_start_range_ns+0x4e3/0x660 kernel/time/hrtimer.c:1302 hrtimer_start_expires include/linux/hrtimer.h:392 [inline] hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1968 [inline] do_nanosleep+0x85/0x2f0 kernel/time/hrtimer.c:2044 hrtimer_nanosleep+0xe7/0x1e0 kernel/time/hrtimer.c:2100 common_nsleep+0x68/0x80 kernel/time/posix-timers.c:1350 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1396 [inline] __se_sys_clock_nanosleep+0x202/0x230 kernel/time/posix-timers.c:1373 __x64_sys_clock_nanosleep+0x55/0x60 kernel/time/posix-timers.c:1373 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x59/0x120 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b read to 0xffff888237d1f3e0 of 8 bytes by task 31102 on cpu 0: print_cpu+0x2fb/0x640 kernel/time/timer_list.c:133 timer_list_show+0x115/0x180 kernel/time/timer_list.c:291 seq_read_iter+0x2bc/0x8f0 fs/seq_file.c:230 proc_reg_read_iter+0x114/0x180 fs/proc/inode.c:302 call_read_iter include/linux/fs.h:2079 [inline] copy_splice_read+0x26b/0x4b0 fs/splice.c:365 do_splice_read fs/splice.c:985 [inline] splice_direct_to_actor+0x268/0x650 fs/splice.c:1089 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0xd7/0x150 fs/splice.c:1233 do_sendfile+0x377/0x880 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x59/0x120 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b value changed: 0x0000014049576900 -> 0x00000140490d77af Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 31102 Comm: syz-executor.0 Not tainted 6.7.0-syzkaller-09928-g052d534373b7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ==================================================================