Created attachment 1936989 [details]
vmware-luks-encrypted.png

Description of problem:
nbdkit command was killed by signal 11 when use luks filter to read LUKS-encrypted disk image 

Version-Release number of selected component (if applicable):
nbdkit-1.32.5-2.el9.x86_64

How reproducible:
100%

Steps to Reproduce:
Scenario1：
1.1 Prepare a LUKSv1-encrypted image which is converted from VMware by v2v, pls refer to screenshot and can copy the disk from http://fileshare.englab.nay.redhat.com/pub/section3/libvirtmanual/mxie/esx6.7-rhel7.8-swap_lvm_luks-redhat123-sda, then use nbdkit luks filer to read the disk image

# nbdkit file esx6.7-rhel7.8-swap_lvm_luks-redhat123-sda --filter=luks passphrase=+/home/diskpw --filter=partition partition=1 --run 'nbdcopy $nbd vmware-luks-disk.img' 
nbdkit: file[1]: error: this disk does not contain a LUKS header
nbdcopy: nbd://localhost:10809: nbd_connect_uri: recv: server disconnected unexpectedly
nbdkit: nbdkit command was killed by signal 11

1.2 Collect the stack trace from the crash
# coredumpctl gdb ;
           PID: 298703 (nbdkit)
           UID: 0 (root)
           GID: 0 (root)
        Signal: 11 (SEGV)
     Timestamp: Tue 2023-01-10 10:24:40 CST (43s ago)
  Command Line: nbdkit file esx6.7-rhel7.8-swap_lvm_luks-redhat123-sda --filter=luks passphrase=+/home/diskpw --filter=partition partition=1 --run $'nbdcopy $nbd vmware-luks-disk.img'
    Executable: /usr/sbin/nbdkit
 Control Group: /user.slice/user-0.slice/session-23.scope
          Unit: session-23.scope
         Slice: user-0.slice
       Session: 23
     Owner UID: 0 (root)
       Boot ID: b0d9437a66f5443fa217a5fb0c833165
    Machine ID: b56ec58ceb2645e2b57214380e119e04
      Hostname: dell-per740-53.lab.eng.pek2.redhat.com
       Storage: none
       Message: Process 298703 (nbdkit) of user 0 dumped core.

Coredump entry has no core attached (neither internally in the journal nor externally on disk).


Scenario2:

2.1 Prepare a luks encrypted image which is created by qemu-img, then use nbdkit luks filer to read the disk image

# qemu-img create -f luks --object secret,data=LETMEPASS,id=sec0 -o key-secret=sec0 encrypted.img 100M
Formatting 'encrypted.img', fmt=luks size=104857600 key-secret=sec0

# nbdkit file encrypted.img --filter=luks passphrase=LETMEPASS --run 'nbdcopy $nbd data.img'

2.2 Use nbdkit luks filer to read the disk image which is copied by nbdcopy
# nbdkit file data.img --filter=luks passphrase=LETMEPASS --run 'nbdcopy $nbd data-b.img'
nbdkit: file[1]: error: this disk does not contain a LUKS header
nbdcopy: nbd://localhost:10809: nbd_connect_uri: recv: server disconnected unexpectedly
nbdkit: nbdkit command was killed by signal 11

2.3 Collect the stack trace from the crash
# coredumpctl gdb ;
           PID: 298807 (nbdkit)
           UID: 0 (root)
           GID: 0 (root)
        Signal: 11 (SEGV)
     Timestamp: Tue 2023-01-10 10:27:29 CST (2min 12s ago)
  Command Line: nbdkit file data.img --filter=luks passphrase=LETMEPASS --run $'nbdcopy $nbd data-b.img'
    Executable: /usr/sbin/nbdkit
 Control Group: /user.slice/user-0.slice/session-23.scope
          Unit: session-23.scope
         Slice: user-0.slice
       Session: 23
     Owner UID: 0 (root)
       Boot ID: b0d9437a66f5443fa217a5fb0c833165
    Machine ID: b56ec58ceb2645e2b57214380e119e04
      Hostname: dell-per740-53.lab.eng.pek2.redhat.com
       Storage: none
       Message: Process 298807 (nbdkit) of user 0 dumped core.

Coredump entry has no core attached (neither internally in the journal nor externally on disk).

Actual results:
As above description

Expected results:
luks filter reads LUKS-encrypted disk image successfully

Additional info: