==================================================================
BUG: KCSAN: data-race in __secure_computing / ptrace_attach

write to 0xffff88804b0ae068 of 4 bytes by task 8891 on cpu 0:
 ptrace_attach+0x217/0x4b0 kernel/ptrace.c:413
 __do_sys_ptrace kernel/ptrace.c:1262 [inline]
 __se_sys_ptrace+0xc1/0x2d0 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 0xffff88804b0ae068 of 4 bytes by task 8885 on cpu 1:
 __secure_computing+0x37/0x1c0 kernel/seccomp.c:1059
 syscall_trace_enter+0x114/0x2c0 kernel/entry/common.c:58
 syscall_enter_from_user_mode+0x2d/0x40 kernel/entry/common.c:82
 do_syscall_64+0x11/0x80 arch/x86/entry/common.c:41
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 8885 Comm: syz-executor.0 Not tainted 5.9.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8885 Comm: syz-executor.0 Not tainted 5.9.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x10f/0x19d lib/dump_stack.c:118
 panic+0x207/0x64a kernel/panic.c:231
 kcsan_report+0x684/0x690 kernel/kcsan/report.c:630
 kcsan_setup_watchpoint+0x41e/0x4a0 kernel/kcsan/core.c:540
 __secure_computing+0x37/0x1c0 kernel/seccomp.c:1059
 syscall_trace_enter+0x114/0x2c0 kernel/entry/common.c:58
 syscall_enter_from_user_mode+0x2d/0x40 kernel/entry/common.c:82
 do_syscall_64+0x11/0x80 arch/x86/entry/common.c:41
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d579
Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff1cb4c9cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 000000000118cf48 RCX: 000000000045d579
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 000000000118cf4c
RBP: 000000000118cf40 R08: 0000000000000009 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffde2eeb07f R14: 00007ff1cb4ca9c0 R15: 000000000118cf4c
Kernel Offset: disabled
Rebooting in 86400 seconds..