Udisks2 Segfaults when Turning Off Devices

[dslm4515]

Command segfaults:

$ udisksctl power-off -b /dev/sdb

(udisksctl power-off:19392): GLib-GIO-CRITICAL **: 15:05:24.205: g_dbus_interface_dup_object: assertion 'G_IS_DBUS_INTERFACE (interface_)' failed
Segmentation fault
[22835.388282] udisksctl[20742]: segfault at 0 ip 00007fe7c110ee6f sp 00007ffc2282c540 error 4 in libgio-2.0.so.0.7000.2[7fe7c101e000+113000]
[22835.388460] Code: 27 ff ff ff 48 8b 7d 00 48 89 c6 e8 9b 12 f1 ff 48 89 ef 5d 48 8b 40 18 ff e0 90 41 54 49 89 f4 55 48 89 fd 53 e8 01 ff ff ff <48> 8b 7d 00 48 89 c6 e8 75 12 f1 ff 4c 89 e7 48 89 c3 e8 5a 4a fd

System has polkit installed, but not running. Same issue even if polktd is running.

System uses seatd instead of elogind.

[dslm4515]

Checked an older MLFS build.... udisksctl did not segfaut. old MLFS build had udisks-2.9.1, elogind, and glib-2.66.4. Build was running on a 32-bit x86 laptop.

Downgraded udisks2 from 2.9.4 to 2.9.1 .... still segfaults Installed elogind .... still segfaults.

Issue with newer glib? ~~or does polkitd need to be running?~~ Tested polkit working, but udisksctl still segfaults

[dslm4515]

Preloading udisksctl with glib-2.66.4's libgio did not work: still segfaults.

[dslm4515]

Rebuilt udisk2 without stripping the debug symbols. Installed the GNU debugger (gdb) to interpret core dumps. Inserted a USB flash drive into machine. Enable core dumps: $ ulimit -c unlimited Then executed: udisksctl power-off -b /dev/sda Same issue: udiskctl segfaults. Used gdb to inspect core dump: $ gdb udisksctl core Output:

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Reading symbols from udisksctl...
[New LWP 619]
[New LWP 620]
[New LWP 621]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `udisksctl power-off -b /dev/sda'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f5128b85b8f in g_dbus_object_get_interface () from /usr/lib/libgio-2.0.so.0
[Current thread is 1 (Thread 0x7f51286f4ec0 (LWP 619))]
(gdb) bt
#0  0x00007f5128b85b8f in g_dbus_object_get_interface () at /usr/lib/libgio-2.0.so.0
#1  0x00007f5128e70b72 in udisks_object_peek_drive () at /usr/lib/libudisks2.so.0
#2  0x000055803c0ba309 in handle_command_power_off ()
#3  0x000055803c0bcb23 in main ()

[dslm4515]

~~When comparing udisksctl and libgio on two different systems (one system has a non-seg-faulting udisks) the system with out udisks segfaults did not have udisksctl and libgio linked to /usr/lib/libterminfo.so or any curses library.~~ When using readelf -d on both built libgio libraries, both are linked to the same libraries, no libterminfo linked.

[dslm4515]

If i check what libraries are linked for a segfaulting udisksctl:

$ readelf -d  /usr/bin/udisksctl                                                                                                                       
                                                                                                                                                       
Dynamic section at offset 0xed68 contains 33 entries:
  Tag        Type                         Name/Value
 0x0000000000000001 (NEEDED)             Shared library: [libpolkit-agent-1.so.0]
 0x0000000000000001 (NEEDED)             Shared library: [libpolkit-gobject-1.so.0]
 0x0000000000000001 (NEEDED)             Shared library: [libudisks2.so.0]
 0x0000000000000001 (NEEDED)             Shared library: [libgobject-2.0.so.0]
 0x0000000000000001 (NEEDED)             Shared library: [libglib-2.0.so.0] 
 0x0000000000000001 (NEEDED)             Shared library: [libgio-2.0.so.0]
 0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]
 0x000000000000000c (INIT)               0x4000
 0x000000000000000d (FINI)               0xbf04

It lacks a library, compared to a udisksctl that does not segfault:

$ readelf -d  /usr/bin/udisksctl                                                                                                                       
                                                                                                                                                      
Dynamic section at offset 0xed68 contains 31 entries:
 Tag        Type                         Name/Value
0x0000000000000001 (NEEDED)             Shared library: [libpolkit-agent-1.so.0]
0x0000000000000001 (NEEDED)             Shared library: [libexpat.so.1]
0x0000000000000001 (NEEDED)             Shared library: [libpolkit-gobject-1.so.0]
0x0000000000000001 (NEEDED)             Shared library: [libudisks2.so.0]
0x0000000000000001 (NEEDED)             Shared library: [libgobject-2.0.so.0]
0x0000000000000001 (NEEDED)             Shared library: [libglib-2.0.so.0] 
0x0000000000000001 (NEEDED)             Shared library: [libgio-2.0.so.0]
0x0000000000000001 (NEEDED)             Shared library: [libc.musl-x86_64.so.1]
0x000000000000000c (INIT)               0x4000
0x000000000000000d (FINI)               0xc771

The non-segfaulting binary has libexpat linked.

[dslm4515]

Looks like building LVM2 without symvers fixes issue ... per commit 3682c6062a84834edd5e264a787ecd4ad70e4aae