[LTP] [PATCH v1] ioctl_pidfd06: Accept both ESRCH and EREMOTE for PIDFD_GET_INFO

[LTP] [PATCH v1] ioctl_pidfd06: Accept both ESRCH and EREMOTE for PIDFD_GET_INFO

[Wei Gao via ltp]

LTP commit f630471a6520 attempted to handle this using a kernel version
check (7.0.0). However, this is proving unreliable as the change is
appearing in earlier kernel versions (e.g., 6.19.x) due to different
release cycles or backports.

Fixes: f630471a6520 ("ioctl_pidfd06: Select expected errno for PIDFD_GET_INFO across pidns")
Signed-off-by: Wei Gao <wegao@suse.com>
---
 testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c b/testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c
index 0f24d4741..fec85d680 100644
--- a/testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c
+++ b/testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c
@@ -14,7 +14,10 @@
 
 static struct tst_clone_args *args;
 static struct pidfd_info *info;
-static int err_nr = ESRCH;
+static int exp_errnos[] = {
+	ESRCH,
+	EREMOTE,
+};
 
 static void run(void)
 {
@@ -42,7 +45,10 @@ static void run(void)
 	args->exit_signal = SIGCHLD;
 
 	if (!SAFE_CLONE(args)) {
-		TST_EXP_FAIL(ioctl(pidfd, PIDFD_GET_INFO, info), err_nr);
+		TST_EXP_FAIL_ARR(
+				ioctl(pidfd, PIDFD_GET_INFO, info),
+				exp_errnos, ARRAY_SIZE(exp_errnos)
+				);
 		exit(0);
 	}
 
@@ -53,9 +59,6 @@ static void setup(void)
 {
 	if (!ioctl_pidfd_info_exit_supported())
 		tst_brk(TCONF, "PIDFD_INFO_EXIT is not supported by ioctl()");
-
-	if (tst_kvercmp(7, 0, 0) >= 0)
-		err_nr = EREMOTE;
 }
 
 static struct tst_test test = {
-- 
2.52.0


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Re: [LTP] [PATCH v1] ioctl_pidfd06: Accept both ESRCH and EREMOTE for PIDFD_GET_INFO

[Petr Vorel]

Hi,

I have no idea what superseded this patch. But as Wai prefers it [1] I set state
new.  Alternative patch [2] [3], with discussion under v1 [4] [5].

Kind regards,
Petr

[1] https://lore.kernel.org/ltp/20260424095900.GA500158@pevik/T/#m58cbc2ecf73d7448bcb466a4a84b6845f147c1b9
[2] https://patchwork.ozlabs.org/project/ltp/patch/20260424101508.505501-1-pvorel@suse.cz/
[3] https://lore.kernel.org/ltp/20260424101508.505501-1-pvorel@suse.cz/T/#u
[4] https://patchwork.ozlabs.org/project/ltp/patch/20260424060543.462475-1-pvorel@suse.cz/
[5] https://lore.kernel.org/ltp/20260424095900.GA500158@pevik/T/#m58cbc2ecf73d7448bcb466a4a84b6845f147c1b9

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Re: [LTP] [PATCH v1] ioctl_pidfd06: Accept both ESRCH and EREMOTE for PIDFD_GET_INFO

[Wei Gao via ltp]

On Fri, Apr 24, 2026 at 12:22:38PM +0200, Petr Vorel wrote:
> Hi,
> 
> I have no idea what superseded this patch. But as Wai prefers it [1] I set state
> new.  Alternative patch [2] [3], with discussion under v1 [4] [5].
Thanks for change to new state.
> 
> Kind regards,
> Petr
> 
> [1] https://lore.kernel.org/ltp/20260424095900.GA500158@pevik/T/#m58cbc2ecf73d7448bcb466a4a84b6845f147c1b9
> [2] https://patchwork.ozlabs.org/project/ltp/patch/20260424101508.505501-1-pvorel@suse.cz/
> [3] https://lore.kernel.org/ltp/20260424101508.505501-1-pvorel@suse.cz/T/#u
> [4] https://patchwork.ozlabs.org/project/ltp/patch/20260424060543.462475-1-pvorel@suse.cz/
> [5] https://lore.kernel.org/ltp/20260424095900.GA500158@pevik/T/#m58cbc2ecf73d7448bcb466a4a84b6845f147c1b9

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Re: [LTP] [PATCH v1] ioctl_pidfd06: Accept both ESRCH and EREMOTE for PIDFD_GET_INFO

[Petr Vorel]

Hi Wei,

...
> > I have no idea what superseded this patch. But as Wai prefers it [1] I set state
> > new.  Alternative patch [2] [3], with discussion under v1 [4] [5].
> Thanks for change to new state.

I got ack for my approach from Li and Jan and was pinged by Andrea to merge it,
therefore it got fixed in 068617a55d ("ioctl_pidfd06: Update kernel version")
and therefore closing this as rejected.

Kind regards,
Petr

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