Re: [PATCH v2 18/27] selftests/landlock: Fix regex_escape() error handling in matches_log_fs_extra()

Use a more conventional error handling interface in regex_escape():
Return a ssize_t, which is either the number of bytes in the output,
or return -1 and set errno.

Before this change, the (log_match_cursor < 0) check in the call site
was never true because log_match_cursor is a pointer.

Signed-off-by: Günther Noack <redacted>

Sashiko has reviewed this patch and found no issues.

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