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================================================================== BUG: KCSAN: data-race in hrtimer_reprogram / print_cpu write to 0xffff888237d1b2a0 of 8 bytes by task 19622 on cpu 1: __hrtimer_reprogram kernel/time/hrtimer.c:656 [inline] hrtimer_reprogram+0x1a5/0x220 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 0xffff888237d1b2a0 of 8 bytes by task 19625 on cpu 0: print_cpu+0x2ea/0x660 kernel/time/timer_list.c:131 timer_list_show+0x107/0x170 kernel/time/timer_list.c:293 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: 0x000000e5a64e5907 -> 0x000000e5a621d107 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 19625 Comm: syz.8.16605 Tainted: G W syzkaller #0 PREEMPT(voluntary) Tainted: [W]=WARN 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/10/24 00:06 | upstream | 266ee584e55e | c0460fcd | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in hrtimer_reprogram / print_cpu | ||
| 2025/10/23 08:43 | upstream | 43e9ad0c55a3 | c0460fcd | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in hrtimer_reprogram / print_cpu | ||
| 2025/10/21 11:08 | upstream | 6548d364a3e8 | 9832ed61 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in hrtimer_reprogram / print_cpu | ||
| 2025/10/12 15:04 | upstream | 67029a49db6c | ff1712fe | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in hrtimer_reprogram / print_cpu | ||
| 2025/09/09 10:31 | upstream | f777d1112ee5 | d291dd2d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in hrtimer_reprogram / print_cpu | ||
| 2025/09/05 02:50 | upstream | 08b06c30a445 | d291dd2d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in hrtimer_reprogram / print_cpu | ||
| 2025/08/20 21:14 | upstream | b19a97d57c15 | 0b9605c8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in hrtimer_reprogram / print_cpu |