[LTP] syscalls/connect02: Handle IPV6_ADDRFORM removal and listen() EINVAL

[linuxtestproject.agent@gmail.com]

Hi Ramesh,

On Wed, 14 Oct 2026 09:56:16 +0200, Ramesh Chhetri wrote:
> syscalls/connect02: Handle IPV6_ADDRFORM removal and listen() EINVAL

> @@ -91,6 +91,14 @@ static void run(void)
> +			if (TST_ERR == ENOPROTOOPT || TST_ERR == EOPNOTSUPP) {
> +				tst_brk(TCONF | TTERRNO,
> +					"IPV6_ADDRFORM is removed/unsupported by this kernel");

High: A kernel containing b6f6118901d1 without 82c9ae440857 returns
ENOPROTOOPT here because its TCP branch leaves retv at -ENOPROTOOPT.
This turns the existing regression check's TFAIL into TCONF.
Distinguish removal, for example with getsockopt(IPV6_ADDRFORM) on fd
before closing it, and retain TFAIL when the option still exists.

> @@ -104,7 +112,15 @@ static void run(void)
> +			if (TST_ERR == EINVAL) {
> +				SAFE_CLOSE(fd);
> +				SAFE_CLOSE(confd1);
> +				continue;
> +			}

Medium: When 8cc3aef0cb19 rejects this transition, all 1000 iterations take
this branch and the function reports TPASS without reaching the second
connect()/accept() that exercises CVE-2018-9568.
Report TCONF when the transition is unavailable instead of silently
continuing to a pass.

Verdict - Needs revision

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