fs.promises.copyFile and fs.copyFileSync fails on Node 22.12 and 23.4 with EPERM: operation not permitted when copying from local disk to a mounted cifs share on alpine

[acuntex]

Version

22.12 and 23.4

Platform

Linux container 6.8.0-49-generic #49-Ubuntu SMP PREEMPT_DYNAMIC Mon Nov  4 02:06:24 UTC 2024 x86_64 Linux

Subsystem

No response

What steps will reproduce the bug?

• Use node:22.12.0-alpine3.20 or node:23.4.0-alpine3.20 as container image.
• Mount a cifs share.
• Use fs.copyFileSync or fs.promises.copyFile to copy a file from the container file system to the mounted share

How often does it reproduce? Is there a required condition?

Every time

What is the expected behavior? Why is that the expected behavior?

The file get's copied.

What do you see instead?

Error: EPERM: operation not permitted, copyfile '/tmp/file.txt' -> '/share/file.txt'
    at Object.copyFile (node:internal/fs/promises:621:10)
    at test {
  errno: -1,
  code: 'EPERM',
  syscall: 'copyfile',
  path: '/tmp/file.txt',
  dest: '/share/test.txt'
}

Additional information

Rolling back to 22.11 fixes the issue.

[cjihrig]

This is likely related to the libuv update in 22.12.0, which included changes for uv_fs_copyfile(). My guess would be libuv/libuv#4396 (cc @juanarbol)

[juanarbol]

Whoops. Let me work on this one.