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================================================================== BUG: KCSAN: data-race in clockevents_program_event / print_tickdevice read-write to 0xffff888237d17780 of 8 bytes by task 15264 on cpu 1: clockevents_program_min_delta kernel/time/clockevents.c:246 [inline] clockevents_program_event+0x38a/0x4e0 kernel/time/clockevents.c:328 tick_program_event+0x79/0xc0 kernel/time/tick-oneshot.c:44 __hrtimer_reprogram kernel/time/hrtimer.c:678 [inline] hrtimer_reprogram+0x1d4/0x220 kernel/time/hrtimer.c:861 hrtimer_start_range_ns+0x6b1/0x740 kernel/time/hrtimer.c:1323 hrtimer_start_expires include/linux/hrtimer.h:273 [inline] hrtimer_restart include/linux/hrtimer.h:281 [inline] common_hrtimer_rearm+0x85/0x90 kernel/time/posix-timers.c:303 __posixtimer_deliver_signal kernel/time/posix-timers.c:321 [inline] posixtimer_deliver_signal+0x120/0x320 kernel/time/posix-timers.c:347 dequeue_signal+0x2cf/0x3b0 kernel/signal.c:660 get_signal+0x376/0xf70 kernel/signal.c:2914 arch_do_signal_or_restart+0x96/0x440 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x77/0x110 kernel/entry/common.c:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x1d6/0x200 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff888237d17780 of 8 bytes by task 15270 on cpu 0: print_tickdevice+0x2ab/0x340 kernel/time/timer_list.c:232 timer_list_show+0x6c/0x170 kernel/time/timer_list.c:298 seq_read_iter+0x636/0x950 fs/seq_file.c:272 proc_reg_read_iter+0x110/0x180 fs/proc/inode.c:299 copy_splice_read+0x442/0x660 fs/splice.c:363 do_splice_read fs/splice.c:982 [inline] splice_direct_to_actor+0x26f/0x680 fs/splice.c:1086 do_splice_direct_actor fs/splice.c:1204 [inline] do_splice_direct+0xda/0x150 fs/splice.c:1230 do_sendfile+0x380/0x650 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64 fs/read_write.c:1417 [inline] __x64_sys_sendfile64+0x105/0x150 fs/read_write.c:1417 x64_sys_call+0x2bb4/0x3000 arch/x86/include/generated/asm/syscalls_64.h:41 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: 0x0000000000065d9f -> 0x0000000000065da0 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 15270 Comm: syz.4.4141 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/10/16 22:50 | upstream | 98ac9cc4b445 | 19568248 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in clockevents_program_event / print_tickdevice | ||
2025/09/01 08:54 | upstream | b320789d6883 | 807a3b61 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in clockevents_program_event / print_tickdevice | ||
2025/07/24 01:23 | upstream | 01a412d06bc5 | 0c1d6ded | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in clockevents_program_event / print_tickdevice | ||
2025/07/07 18:11 | upstream | d7b8f8e20813 | 4f67c4ae | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in clockevents_program_event / print_tickdevice |