On Wed, 31 Mar 2021, Christos Zoulas wrote:
What is the NFS server? Because on NetBSD it returns 255...
$ uname -a NetBSD x202e.localdomain 9.99.81 NetBSD 9.99.81 (GENERIC) #0: Sat Mar 27 02:58:39 UTC 2021 mkre...@mkrepro.netbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC amd64 It doesn't happen usually. I was only able to reproduce Hauke's SEGV by mounting an ext2 FS on /mnt; exporting /mnt via NFS as /altroot; then unmounting and remounting /mnt: $ sudo mount -r -t ext2fs /dev/dk11 /mnt $ sudo mount -r -t nfs localhost:/mnt /altroot $ mount /dev/dk9 on / type ffs (log, noatime, local) kernfs on /kern type kernfs (local) ptyfs on /dev/pts type ptyfs (local) procfs on /proc type procfs (local) tmpfs on /var/shm type tmpfs (local) tmpfs on /tmp type tmpfs (local) /dev/dk11 on /mnt type ext2fs (read-only, local) localhost:/mnt on /altroot type nfs (read-only) $ /tmp/a.out /altroot/work/dmesg.txt a.out: /altroot/work/dmesg.txt: statvfs failed: Permission denied $ sudo pkill -HUP mountd $ /tmp/a.out /altroot/work/dmesg.txt svfs.f_frsize: 512 svfs.f_iosize: 32768 svfs.f_bsize: 512 svfs.f_namemax: 0 $ -RVP