jackdbus crash on jack_unload

[tavasti]

jackdbus crash on jack_unload

I load another audioadapter with command: jack_load -i "-d hw:Ultra -i6 -o6" ultra audioadapter

unloading it with: jack_unload ultra

After this, jackdbus will crash (will attach log file)

Environment

• JACK Version: 1.9.17~dfsg-1
• Operating System: linux devuan 4.0 (same as debian 11)
• Installation: package manager

Steps To Reproduce

Assuming you have extra audio interface which has name Ultra in arecord -l

jack_load -i "-d hw:Ultra -i6 -o6" ultra audioadapter
jack_unload ultra

Expected vs. actual behavior

Expecting extra audio adapter to unload, and jack continue to work

[tavasti]

jackdbus.log

[nedko]

8:37 2023: ERROR: Abort!
8:37 2023: ERROR: info.si_signo = 6
8:37 2023: ERROR: info.si_errno = 0
8:37 2023: ERROR: info.si_code = -6 (unknown)
8:37 2023: ERROR: info.si_addr = 0x3e80000774a
8:37 2023: ERROR: reg[00] = 0x0000000000000000
8:37 2023: ERROR: reg[01] = 0x00007fde458503b0
8:37 2023: ERROR: reg[02] = 0x0000000000000008
8:37 2023: ERROR: reg[03] = 0x0000000000000246
8:37 2023: ERROR: reg[04] = 0x00007fde45850620
8:37 2023: ERROR: reg[05] = 0x0000000000001000
8:37 2023: ERROR: reg[06] = 0x0000000000000010
8:37 2023: ERROR: reg[07] = 0x00007fde46308000
8:37 2023: ERROR: reg[08] = 0x0000000000000002
8:37 2023: ERROR: reg[09] = 0x00007fde458503b0
8:37 2023: ERROR: reg[10] = 0x00007fde45850700
8:37 2023: ERROR: reg[11] = 0x00007fde45851700
8:37 2023: ERROR: reg[12] = 0x0000000000000000
8:37 2023: ERROR: reg[13] = 0x0000000000000000
8:37 2023: ERROR: reg[14] = 0x00007fde464c8ce1
8:37 2023: ERROR: reg[15] = 0x00007fde458503b0
8:37 2023: ERROR: reg[16] = 0x00007fde464c8ce1
8:37 2023: ERROR: reg[17] = 0x0000000000000246
8:37 2023: ERROR: reg[18] = 0x002b000000000033
8:37 2023: ERROR: reg[19] = 0x0000000000000000
8:37 2023: ERROR: reg[20] = 0x0000000000000000
8:37 2023: ERROR: reg[21] = 0x0000000000005a07
8:37 2023: ERROR: reg[22] = 0x0000000000000000
8:37 2023: ERROR: Stack trace:
8:37 2023: ERROR: 1: 0x7fde464c8ce1 <gsignal+321> (/lib/x86_64-linux-gnu/libc.so.6)
8:37 2023: ERROR: End of stack trace

[nedko]

A stack trace with debug info will be much more useful than the currently reported one.
After building jack2 with debug info and without optimization, run jackdbus through gdb,
then crash it and obtain the better stack trace.

[nedko]

The crash may be related to initialization failure described in #934

[tavasti]

Because zalsa_in and zalsa_out exist, this bug might be regarded as obsolete, and closed.