==================================================================
BUG: KCSAN: data-race in handle_mm_fault / watchdog

read to 0xffff888120f26010 of 8 bytes by task 1069 on cpu 1:
 check_hung_uninterruptible_tasks kernel/hung_task.c:197 [inline]
 watchdog+0x2c3/0x7c0 kernel/hung_task.c:289
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

write to 0xffff888120f26010 of 8 bytes by task 5235 on cpu 0:
 handle_mm_fault+0x4a/0x530 mm/memory.c:3987
 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline]
 __do_page_fault+0x456/0x8d0 arch/x86/mm/fault.c:1506
 do_page_fault+0x38/0x194 arch/x86/mm/fault.c:1530
 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1202

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 5235 Comm: syz-executor.5 Not tainted 5.4.0-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: 0 PID: 5235 Comm: syz-executor.5 Not tainted 5.4.0-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+0x11d/0x181 lib/dump_stack.c:118
 panic+0x210/0x640 kernel/panic.c:221
 kcsan_report.cold+0xc/0xd kernel/kcsan/report.c:315
 kcsan_setup_watchpoint+0x3fe/0x460 kernel/kcsan/core.c:423
 check_access kernel/kcsan/core.c:466 [inline]
 __tsan_write8 kernel/kcsan/core.c:596 [inline]
 __tsan_unaligned_write8+0xc4/0x100 kernel/kcsan/core.c:596
 handle_mm_fault+0x4a/0x530 mm/memory.c:3987
 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline]
 __do_page_fault+0x456/0x8d0 arch/x86/mm/fault.c:1506
 do_page_fault+0x38/0x194 arch/x86/mm/fault.c:1530
 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1202
RIP: 0033:0x40d666
Code: 74 28 41 8b 07 85 c0 0f 85 f0 00 00 00 41 83 c6 01 48 81 c5 a8 00 00 00 41 83 fe 10 75 d7 bf a0 ff 4b 00 31 c0 e8 8a 46 ff ff <c6> 45 f8 01 44 89 75 f4 48 89 ef c6 45 15 00 c7 45 fc 00 00 00 00
RSP: 002b:00007fff76e0afa0 EFLAGS: 00010246
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00007fff76e0b058
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
RBP: 000000000075bf2c R08: 00007fff76e0b060 R09: 00000000007600a8
R10: 000000000043a3d0 R11: 0000000000000013 R12: 000000000075bf20
R13: 0000000000000004 R14: 0000000000000000 R15: 000000000075bf2c
Kernel Offset: disabled
Rebooting in 86400 seconds..