[LTP] [PATCH] pidfs: return -EREMOTE when PIDFD_GET_INFO is called on another ns

Fri Feb 6 03:51:24 CET 2026

Hello,

kernel test robot noticed "ltp.ioctl_pidfd06.fail" on:

commit: 16cc0cf19e0b75a336cbf619d208e22b351bd430 ("[PATCH] pidfs: return -EREMOTE when PIDFD_GET_INFO is called on another ns")
url: https://github.com/intel-lab-lkp/linux/commits/luca-boccassi-gmail-com/pidfs-return-EREMOTE-when-PIDFD_GET_INFO-is-called-on-another-ns/20260128-065425
base: https://git.kernel.org/cgit/linux/kernel/git/vfs/vfs.git vfs.all
patch link: https://lore.kernel.org/all/20260127225209.2293342-1-luca.boccassi@gmail.com/
patch subject: [PATCH] pidfs: return -EREMOTE when PIDFD_GET_INFO is called on another ns

in testcase: ltp
version: 
with following parameters:

	disk: 1SSD
	fs: btrfs
	test: syscalls-00/ioctl_pidfd06

config: x86_64-rhel-9.4-ltp
compiler: gcc-14
test machine: 4 threads 1 sockets Intel(R) Core(TM) i3-3220 CPU @ 3.30GHz (Ivy Bridge) with 8G memory

(please refer to attached dmesg/kmsg for entire log/backtrace)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202602061056.b94e9170-lkp@intel.com

2026-02-03 16:33:15 kirk -U ltp -f temp_single_test --env TMPDIR=/fs/sdb1/tmpdir
Host information

	Hostname:   lkp-ivb-d04
	Python:     3.13.5 (main, Jun 25 2025, 18:55:22) [GCC 14.2.0]
	Directory:  /tmp/kirk.root/tmppqdrj0by

Connecting to SUT: default

Starting suite: temp_single_test
---------------------------------
[1;37mioctl_pidfd06: [0m[1;31mfail[0m | [1;33mtainted[0m  (0.034s)

Execution time: 0.100s

	Suite:       temp_single_test
	Total runs:  1
	Runtime:     0.034s
	Passed:      0
	Failed:      1
	Skipped:     0
	Broken:      0
	Warnings:    0
	Kernel:      Linux 6.19.0-rc5-00159-g16cc0cf19e0b #1 SMP PREEMPT_DYNAMIC Tue Feb  3 23:56:34 CST 2026
	Machine:     unknown
	Arch:        x86_64
	RAM:         6899592 kB
	Swap:        0 kB
	Distro:      debian 13

Disconnecting from SUT: default
Session stopped

The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260206/202602061056.b94e9170-lkp@intel.com

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki