[LTP] read_all: Fix buffer too small for long paths

[linuxtestproject.agent@gmail.com]

Hi Michael,

On Sep 7, 2026, Michael Menasherov wrote:
> read_all: Fix buffer too small for long paths

> +#define BUFFER_SIZE PATH_MAX

With the existing `if (++j >= BUFFER_SIZE - 1)` check, this still rejects a
valid PATH_MAX - 1-character pathname and reports TBROK before writing its
terminating NUL. A 4095-byte pathname reproduces this on PATH_MAX=4096; change
the queue_pop() bound so PATH_MAX - 1 characters fit.

Verdict - Needs revision

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