[LTP] futex_wait06: Add EFAULT error coverage test

[linuxtestproject.agent@gmail.com]

Hi Michael,

--- [PATCH 4/4] ---

On Tue, 19 May 2026 21:30:31 +0300, Michael Menasherov wrote:
> futex_cmp_requeue03: Add EFAULT error coverage test

> +/*\
> + * Check that futex(FUTEX_CMP_REQUEUE) returns EFAULT when uaddr or
> + * uaddr2 points to unmapped memory, or when uaddr points to memory
> + * without read permission (PROT_NONE).
> + *
> + * The EACCES behavior for PROT_NONE was introduced in kernel 5.9.
> + */

The doc comment says "returns EFAULT ... when uaddr points to memory
without read permission (PROT_NONE)", but the test correctly expects
EACCES for that case on kernels >= 5.9. Please update the comment to
reflect both outcomes, e.g.:

  "returns EFAULT when uaddr or uaddr2 points to unmapped memory, or
   EACCES (EFAULT on kernels < 5.9) when uaddr points to PROT_NONE
   memory."

Patches 1–3 look good.

---
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