Re: [LTP] sched_setattr01: Convert to new API

[linuxtestproject.agent@gmail.com]

Hi Andrea,

On Thu, Sep 3, 2026, Andrea Cervesato wrote:
> sched_setattr01: Convert to new API

--- [PATCH 4/5] ---

> +#ifndef PR_SET_MM_MAP
> +# define PR_SET_MM_MAP	14
> +#endif

PR_SET_MM_MAP_SIZE is listed in the commit message but is not defined here.
Add its UAPI value, 15, alongside PR_SET_MM_MAP.

--- [PATCH 5/5] ---

> +	map.start_code = map.start_data = map.end_data =
> +	map.start_brk = map.brk = map.start_stack = map.arg_start =
> +	map.arg_end = map.env_start = map.env_end = (uint64_t)(uintptr_t)↦

PR_SET_MM_MAP copies these values into current->mm, so this sets the process
break to a stack address before the test starts. Preserve the real break with
sbrk(0), as waiter_fn() does, and supply valid current values for the other
memory-map fields.

> +	if (i == ARRAY_SIZE(try_sizes))
> +		tst_brk(TBROK | TERRNO, "PR_SET_MM_MAP failed for all auxv sizes");

PR_SET_MM_MAP was added in Linux 3.18, while the CVE predates it. Add
`.min_kver = "3.18"` or report TCONF when this required operation is
unavailable instead of reporting TBROK.

Verdict - Needs revision

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