KCSAN: data-race in complete_signal / ptrace

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in complete_signal / ptrace_attach (5) kernel	6	1	1801d	1801d	0/29	auto-closed as invalid on 2021/10/20 20:50
upstream	KCSAN: data-race in complete_signal / ptrace_attach kernel	6	1	2231d	2231d	0/29	auto-closed as invalid on 2020/08/16 11:51
upstream	KCSAN: data-race in complete_signal / ptrace_attach (4) kernel	6	2	1846d	1866d	0/29	auto-closed as invalid on 2021/09/05 09:58
upstream	KCSAN: data-race in complete_signal / ptrace_attach (3) kernel	6	1	2064d	2064d	0/29	auto-closed as invalid on 2021/01/30 06:54

================================================================== BUG: KCSAN: data-race in complete_signal / ptrace_attach write to 0xffff888137010068 of 4 bytes by task 18535 on cpu 1: ptrace_attach+0x217/0x4b0 kernel/ptrace.c:413 __do_sys_ptrace kernel/ptrace.c:1262 [inline] __se_sys_ptrace+0xc1/0x2e0 kernel/ptrace.c:1242 __x64_sys_ptrace+0x51/0x60 kernel/ptrace.c:1242 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888137010068 of 4 bytes by task 18538 on cpu 0: complete_signal+0x455/0x5f0 kernel/signal.c:1034 __send_signal+0x666/0x780 kernel/signal.c:1181 send_signal+0x39f/0x3d0 kernel/signal.c:1242 do_send_sig_info+0x9b/0xe0 kernel/signal.c:1291 do_send_specific kernel/signal.c:3799 [inline] do_tkill kernel/signal.c:3825 [inline] __do_sys_tkill kernel/signal.c:3860 [inline] __se_sys_tkill+0x12b/0x180 kernel/signal.c:3854 __x64_sys_tkill+0x2d/0x40 kernel/signal.c:3854 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 18538 Comm: syz-executor.3 Not tainted 5.10.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================