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

read to 0xffff8881261ad050 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 0xffff8881261ad050 of 8 bytes by task 7607 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: 7607 Comm: syz-fuzzer 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: 7607 Comm: syz-fuzzer 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: 0033:0x41d194
Code: 48 83 c6 08 49 83 f8 08 0f 8d e7 00 00 00 48 39 de 0f 83 de 00 00 00 0f ba e2 00 0f 83 ca 00 00 00 4c 8b 4c 24 78 4e 8d 14 0e <4d> 8b 12 4d 85 d2 74 c9 4c 39 d0 77 c4 49 39 ca 73 bf 4c 89 44 24
RSP: 002b:00007ffc33fa93b0 EFLAGS: 00010283
RAX: 000000c420000000 RBX: 0000000000040000 RCX: 000000c4316e0000
RDX: 0000000000000005 RSI: 0000000000037420 RDI: 00007f54ed612000
RBP: 00007ffc33fa9418 R08: 0000000000000004 R09: 0000000001473c00
R10: 00000000014ab020 R11: 00007ffc33fa9560 R12: 000000c42d63f898
R13: 0000000000000007 R14: 0000000000c21f20 R15: 000000000000325c
Kernel Offset: disabled
Rebooting in 86400 seconds..