nbd-client dies when running `passwd` in chroot

[Derkades]

Hi, I encountered a bit of a strange problem. I am using nbd-client version 3.25.

My steps:

• nbd-client -name test 10.0.1.1 /dev/nbd0
• mount /dev/nbd0 /mnt/fedora: /dev/nbd0 contains an ext4 filesystem with a Fedora system
• chroot /mnt/fedora
• passwd: returns segmentation fault
• It is no longer possible to use the mounted file system

In dmesg:

[Wed Oct 23 23:08:51 2024] block nbd0: Send control failed (result -13)
[Wed Oct 23 23:08:51 2024] block nbd0: Request send failed, requeueing
[Wed Oct 23 23:08:51 2024] block nbd0: Dead connection, failed to find a fallback
[Wed Oct 23 23:08:51 2024] block nbd0: Receive control failed (result -32)
[Wed Oct 23 23:08:51 2024] block nbd0: shutting down sockets
[Wed Oct 23 23:08:51 2024] I/O error, dev nbd0, sector 33146720 op 0x0:(READ) flags 0x80700 phys_seg 19 prio class 0
[Wed Oct 23 23:08:51 2024] I/O error, dev nbd0, sector 33146856 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[Wed Oct 23 23:08:51 2024] I/O error, dev nbd0, sector 33146856 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[Wed Oct 23 23:08:54 2024] I/O error, dev nbd0, sector 33816576 op 0x1:(WRITE) flags 0x9800 phys_seg 1 prio class 2
[Wed Oct 23 23:08:54 2024] Buffer I/O error on dev nbd0, logical block 4227072, lost sync page write
[Wed Oct 23 23:08:54 2024] JBD2: I/O error when updating journal superblock for nbd0-8.
[Wed Oct 23 23:08:54 2024] Aborting journal on device nbd0-8.
[Wed Oct 23 23:08:54 2024] I/O error, dev nbd0, sector 33816576 op 0x1:(WRITE) flags 0x9800 phys_seg 1 prio class 2
[Wed Oct 23 23:08:54 2024] Buffer I/O error on dev nbd0, logical block 4227072, lost sync page write
[Wed Oct 23 23:08:54 2024] JBD2: I/O error when updating journal superblock for nbd0-8.

I can share the block device contents if needed.

[yoe]

[Wed Oct 23 23:08:51 2024] block nbd0: Send control failed (result -13)

This indicates that the connection was dropped.

What do the server logs say at that point?