================================================================== BUG: KCSAN: data-race in fuse_set_nowrite / fuse_writepage_end write to 0xffff888095567df8 of 4 bytes by task 28585 on cpu 1: fuse_writepage_end+0x448/0x6e0 fs/fuse/file.c:1761 fuse_request_end+0x757/0x7a0 fs/fuse/dev.c:326 end_requests fs/fuse/dev.c:2056 [inline] fuse_abort_conn+0xab9/0xb10 fs/fuse/dev.c:2151 fuse_dev_release+0x2c6/0x310 fs/fuse/dev.c:2186 __fput+0x246/0x4d0 fs/file_table.c:281 ____fput+0x11/0x20 fs/file_table.c:314 task_work_run+0x8e/0x110 kernel/task_work.c:141 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:163 [inline] exit_to_user_mode_prepare+0x1b2/0x210 kernel/entry/common.c:190 syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:265 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888095567df8 of 4 bytes by task 28586 on cpu 0: fuse_set_nowrite+0x12d/0x180 fs/fuse/dir.c:1410 fuse_sync_writes fs/fuse/file.c:439 [inline] fuse_fsync+0xd6/0x290 fs/fuse/file.c:538 vfs_fsync_range+0x107/0x120 fs/sync.c:200 generic_write_sync include/linux/fs.h:2747 [inline] generic_file_write_iter+0x3af/0x3e0 mm/filemap.c:3666 fuse_cache_write_iter fs/fuse/file.c:1257 [inline] fuse_file_write_iter+0x334/0x6c0 fs/fuse/file.c:1561 call_write_iter include/linux/fs.h:1882 [inline] new_sync_write fs/read_write.c:503 [inline] vfs_write+0x665/0x6f0 fs/read_write.c:578 ksys_write+0xce/0x180 fs/read_write.c:631 __do_sys_write fs/read_write.c:643 [inline] __se_sys_write fs/read_write.c:640 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:640 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 28586 Comm: syz-executor.0 Not tainted 5.9.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================