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BUG: KCSAN: data-race in fuse_abort_conn / fuse_get_req

write to 0xffff88810dbb0504 of 4 bytes by task 31058 on cpu 0:
 fuse_set_initialized fs/fuse/dev.c:82 [inline]
 fuse_abort_conn+0xa9/0xb10 fs/fuse/dev.c:2116
 fuse_dev_release+0x2b6/0x300 fs/fuse/dev.c:2193
 __fput+0x263/0x4f0 fs/file_table.c:280
 ____fput+0x11/0x20 fs/file_table.c:313
 task_work_run+0x8e/0x110 kernel/task_work.c:140
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:174 [inline]
 exit_to_user_mode_prepare+0x17c/0x1b0 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301
 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88810dbb0504 of 4 bytes by task 31111 on cpu 1:
 fuse_block_alloc fs/fuse/dev.c:87 [inline]
 fuse_get_req+0x15d/0x580 fs/fuse/dev.c:115
 fuse_simple_request+0x83/0xde0 fs/fuse/dev.c:504
 fuse_lookup_name+0x153/0x3b0 fs/fuse/dir.c:428
 fuse_lookup+0x9b/0x2b0 fs/fuse/dir.c:469
 __lookup_slow+0x181/0x250 fs/namei.c:1630
 lookup_slow fs/namei.c:1647 [inline]
 walk_component+0x2a5/0x350 fs/namei.c:1943
 lookup_last fs/namei.c:2398 [inline]
 path_lookupat+0x12d/0x570 fs/namei.c:2422
 filename_lookup+0xff/0x390 fs/namei.c:2455
 user_path_at_empty+0x3b/0x50 fs/namei.c:2735
 user_path_at include/linux/namei.h:60 [inline]
 vfs_statx+0x98/0x290 fs/stat.c:195
 vfs_fstatat fs/stat.c:217 [inline]
 __do_sys_newfstatat fs/stat.c:386 [inline]
 __se_sys_newfstatat+0x4c/0x250 fs/stat.c:380
 __x64_sys_newfstatat+0x51/0x60 fs/stat.c:380
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 31111 Comm: syz-executor.5 Not tainted 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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