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================================================================== BUG: KCSAN: data-race in print_cpu / tick_nohz_idle_enter write to 0xffff888237c1f368 of 8 bytes by task 0 on cpu 0: tick_nohz_start_idle kernel/time/tick-sched.c:686 [inline] tick_nohz_idle_enter+0x85/0xd0 kernel/time/tick-sched.c:1172 do_idle+0x3c/0x230 kernel/sched/idle.c:256 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:379 rest_init+0xf3/0x100 init/main.c:726 arch_call_rest_init+0x9/0x10 init/main.c:823 start_kernel+0x57d/0x5d0 init/main.c:1068 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:556 x86_64_start_kernel+0x94/0xa0 arch/x86/kernel/head64.c:537 secondary_startup_64_no_verify+0x167/0x16b read to 0xffff888237c1f368 of 8 bytes by task 4847 on cpu 1: print_cpu+0x4c4/0x640 kernel/time/timer_list.c:158 timer_list_show+0x115/0x180 kernel/time/timer_list.c:291 seq_read_iter+0x612/0x8f0 fs/seq_file.c:272 proc_reg_read_iter+0x114/0x180 fs/proc/inode.c:305 call_read_iter include/linux/fs.h:1979 [inline] copy_splice_read+0x26b/0x4b0 fs/splice.c:364 vfs_splice_read fs/splice.c:993 [inline] splice_direct_to_actor+0x28c/0x690 fs/splice.c:1069 do_splice_direct+0x10d/0x190 fs/splice.c:1194 do_sendfile+0x3b6/0x9a0 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x0000001c1e119f04 -> 0x0000001c1e149543 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 4847 Comm: syz-executor.4 Not tainted 6.5.0-syzkaller-08894-gb97d64c72259 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2023/08/31 16:04 | upstream | b97d64c72259 | 84803932 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in print_cpu / tick_nohz_idle_enter |