KCSAN: data-race in do_nanosleep / task_current

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in do_nanosleep / task_current_syscall (2) fs				2	1548d	1600d	0/26	auto-closed as invalid on 2020/04/02 17:12

================================================================== BUG: KCSAN: data-race in do_nanosleep / task_current_syscall write to 0xffff8881019ad110 of 8 bytes by task 10244 on cpu 0: do_nanosleep+0x1da/0x320 kernel/time/hrtimer.c:1878 hrtimer_nanosleep+0x191/0x320 kernel/time/hrtimer.c:1924 __do_sys_nanosleep kernel/time/hrtimer.c:1958 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1945 [inline] __x64_sys_nanosleep+0x106/0x150 kernel/time/hrtimer.c:1945 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8881019ad110 of 8 bytes by task 10246 on cpu 1: task_current_syscall+0x40/0xf0 lib/syscall.c:70 proc_pid_syscall fs/proc/base.c:639 [inline] proc_pid_syscall+0x8d/0x200 fs/proc/base.c:628 proc_single_show+0x89/0xe0 fs/proc/base.c:756 seq_read+0x350/0x960 fs/seq_file.c:229 do_loop_readv_writev fs/read_write.c:714 [inline] do_loop_readv_writev fs/read_write.c:701 [inline] do_iter_read+0x357/0x3d0 fs/read_write.c:935 vfs_readv+0x9c/0xf0 fs/read_write.c:997 do_preadv+0x131/0x1d0 fs/read_write.c:1089 __do_sys_preadv fs/read_write.c:1139 [inline] __se_sys_preadv fs/read_write.c:1134 [inline] __x64_sys_preadv+0x61/0x80 fs/read_write.c:1134 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 10246 Comm: syz-executor.2 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================