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BUG: KCSAN: data-race in fuse_get_req / fuse_set_initialized

read to 0xffff8880aaa06f04 of 4 bytes by task 18071 on cpu 1:
 fuse_block_alloc fs/fuse/dev.c:86 [inline]
 fuse_get_req+0xb6/0x450 fs/fuse/dev.c:113
 fuse_simple_request+0x7f/0x640 fs/fuse/dev.c:492
 fuse_getxattr+0x28c/0x300 fs/fuse/xattr.c:80
 fuse_xattr_get+0x38/0x50 fs/fuse/xattr.c:181
 __vfs_getxattr+0x9a/0xd0 fs/xattr.c:311
 vfs_getxattr+0x1fe/0x230 fs/xattr.c:342
 getxattr+0xc1/0x270 fs/xattr.c:538
 path_getxattr+0x87/0x100 fs/xattr.c:566
 __do_sys_lgetxattr fs/xattr.c:584 [inline]
 __se_sys_lgetxattr fs/xattr.c:581 [inline]
 __x64_sys_lgetxattr+0x61/0x80 fs/xattr.c:581
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff8880aaa06f04 of 4 bytes by task 18069 on cpu 0:
 fuse_set_initialized+0x22/0x40 fs/fuse/dev.c:81
 process_init_reply+0x96/0xb90 fs/fuse/inode.c:969
 fuse_request_end+0x324/0x530 fs/fuse/dev.c:328
 end_requests+0x100/0x160 fs/fuse/dev.c:2051
 fuse_abort_conn+0x6de/0x740 fs/fuse/dev.c:2146
 fuse_dev_release+0x26b/0x290 fs/fuse/dev.c:2181
 __fput+0x1e1/0x520 fs/file_table.c:280
 ____fput+0x1f/0x30 fs/file_table.c:313
 task_work_run+0xf6/0x130 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x2b4/0x2c0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x353/0x370 arch/x86/entry/common.c:300
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 18069 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
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