linux-kernel - Re: 6.18.0-rc1: LTP syscalls ioctl_pidfd05: TFAIL: ioctl(pidfd, PIDFD_GET_INFO_SHORT, info

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Message-ID: <aPILdh2XzsYgEg66@yuki.lan>
Date: Fri, 17 Oct 2025 11:25:10 +0200
From: Cyril Hrubis <chrubis@...e.cz>
To: Naresh Kamboju <naresh.kamboju@...aro.org>
Cc: open list <linux-kernel@...r.kernel.org>, linux-fsdevel@...r.kernel.org,
	lkft-triage@...ts.linaro.org,
	Linux Regressions <regressions@...ts.linux.dev>,
	LTP List <ltp@...ts.linux.it>,
	Andrey Albershteyn <aalbersh@...nel.org>, Jan Kara <jack@...e.cz>,
	Arnd Bergmann <arnd@...db.de>,
	Christian Brauner <brauner@...nel.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Dan Carpenter <dan.carpenter@...aro.org>,
	Anders Roxell <anders.roxell@...aro.org>,
	Ben Copeland <benjamin.copeland@...aro.org>,
	Petr Vorel <pvorel@...e.cz>,
	Andrea Cervesato <andrea.cervesato@...e.com>
Subject: Re: 6.18.0-rc1: LTP syscalls ioctl_pidfd05: TFAIL: ioctl(pidfd,
 PIDFD_GET_INFO_SHORT, info_invalid) expected EINVAL: ENOTTY (25)

Hi!
> > The LTP syscalls ioctl_pidfd05 test failed due to following error on
> > the Linux mainline
> > kernel v6.18-rc1-104-g7ea30958b305 on the arm64, arm and x86_64.
> >
> > The Test case is expecting to fail with EINVAL but found ENOTTY.
> 
> [Not a kernel regression]
> 
> From the recent LTP upgrade we have newly added test cases,
> ioctl_pidfd()
> 
> The test case is meant to test,
> 
> Add ioctl_pidfd05 test
> Verify that ioctl() raises an EINVAL error when PIDFD_GET_INFO
>  is used.
>  This happens when:
>    - info parameter is NULL
>    - info parameter is providing the wrong size
> 
> However, we need to investigate the reason for failure.
> 
> Test case: https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/syscalls/ioctl/ioctl_pidfd05.c

Already fixed in:

commit 00c3e947cece63ce81cdaf12b5a2071984aa7815
Author: Avinesh Kumar <akumar@...e.de>
Date:   Thu Sep 25 10:19:11 2025 +0200

    Introduce ioctl_pidfd_get_info_supported() function

    Check if ioctl(PIDFD_GET_INFO) is implemented or not
    before proceeding in ioctl_pidfd05 test.


-- 
Cyril Hrubis
chrubis@...e.cz