==================================================================
BUG: KCSAN: data-race in fuse_get_req / fuse_set_initialized

read to 0xffff8880a489a704 of 4 bytes by task 29951 on cpu 0:
 fuse_block_alloc fs/fuse/dev.c:86 [inline]
 fuse_get_req+0xb6/0x450 fs/fuse/dev.c:113
 fuse_simple_request+0x7f/0x6d0 fs/fuse/dev.c:492
 fuse_access+0x1ab/0x200 fs/fuse/dir.c:1122
 fuse_permission+0x2f5/0x390 fs/fuse/dir.c:1196
 do_inode_permission fs/namei.c:384 [inline]
 inode_permission+0x241/0x370 fs/namei.c:449
 ksys_chroot+0x9b/0x1e0 fs/open.c:516
 __do_sys_chroot fs/open.c:541 [inline]
 __se_sys_chroot fs/open.c:539 [inline]
 __x64_sys_chroot+0x28/0x40 fs/open.c:539
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff8880a489a704 of 4 bytes by task 29950 on cpu 1:
 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:2056
 fuse_abort_conn+0x737/0x7d0 fs/fuse/dev.c:2151
 fuse_dev_release+0x26b/0x290 fs/fuse/dev.c:2186
 __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:164
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:278 [inline]
 do_syscall_64+0x384/0x3a0 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 29950 Comm: syz-executor.5 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================