Bug#1019952: gnome-disk-utility: segfault in libudisks2.so.0.0.0

[Bernhard Übelacker]

Hello piorunz,
I tried to get some more information from your dmesg line and think
the crash takes place in function udisks_drive_ata_get_smart_enabled.

I could not find any crashes related to this function in udisks2
upstream bug tracker, but gnome-disks upstream tracker
contains [56], that might be related.

To be sure it would be good if you could generate a backtrace
of the crash.
For this is might be already sufficient to install systemd-coredump [1].
Then the segfault line should be followed more information
about the crash in the journal.

Kind regards,
Bernhard






> [74281.147838] gnome-disks[2098897]: segfault at a0 ip 00007f7b10aeefc8 sp
> 00007ffd5bd91c48 error 4 in libudisks2.so.0.0.0[7f7b10adb000+53000]
> [74281.147852] Code: e9 0d ce fe ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 53
> 48 89 fb e8 77 c3 fe ff 48 8b 3b 48 89 c6 e8 bc c0 fe ff 48 89 df 5b <48> 8b 80
> a0 00 00 00 ff e0 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44


(gdb) find /b 0x00007ffff7022960, 0x00007ffff707392f, 0xe9, 0x0d, 0xce, 0xfe, 0xff, 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x1f, 0x00, 0x53, 0x48, 0x89, 0xfb, 0xe8, 0x77, 0xc3, 0xfe, 0xff, 0x48, 0x8b, 0x3b, 0x48, 0x89, 0xc6, 0xe8, 0xbc, 0xc0, 0xfe, 0xff, 0x48, 0x89, 0xdf, 0x5b, 0x48, 0x8b, 0x80, 0xa0, 0x00, 0x00, 0x00, 0xff, 0xe0, 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x1f, 0x44
0x7ffff7034f9e <udisks_drive_ata_set_smart_supported+30>
1 pattern found.
(gdb) b * (0x7ffff7034f9e + 42)
Breakpoint 2 at 0x7ffff7034fc8: file ./udisks/udisks-generated.c, line 9308.
(gdb) info b
Num     Type           Disp Enb Address            What
2       breakpoint     keep y   0x00007ffff7034fc8 in udisks_drive_ata_get_smart_enabled at ./udisks/udisks-generated.c:9308
(gdb) disassemble /r 0x7ffff7034f9e, 0x7ffff7034f9e + 62
Dump of assembler code from 0x7ffff7034f9e to 0x7ffff7034fdc:
    0x00007ffff7034f9e <udisks_drive_ata_set_smart_supported+30>:        e9 0d ce fe ff  jmp    0x7ffff7021db0 <g_object_set at plt>
    0x00007ffff7034fa3:  66 2e 0f 1f 84 00 00 00 00 00   cs nopw 0x0(%rax,%rax,1)
    0x00007ffff7034fad:  0f 1f 00        nopl   (%rax)
    0x00007ffff7034fb0 <udisks_drive_ata_get_smart_enabled+0>:   53                      push   %rbx
    0x00007ffff7034fb1 <udisks_drive_ata_get_smart_enabled+1>:   48 89 fb                mov    %rdi,%rbx
    0x00007ffff7034fb4 <udisks_drive_ata_get_smart_enabled+4>:   e8 77 c3 fe ff          call   0x7ffff7021330 <udisks_drive_ata_get_type at plt>
    0x00007ffff7034fb9 <udisks_drive_ata_get_smart_enabled+9>:   48 8b 3b                mov    (%rbx),%rdi
    0x00007ffff7034fbc <udisks_drive_ata_get_smart_enabled+12>:  48 89 c6                mov    %rax,%rsi
    0x00007ffff7034fbf <udisks_drive_ata_get_smart_enabled+15>:  e8 bc c0 fe ff          call   0x7ffff7021080 <g_type_interface_peek at plt>
    0x00007ffff7034fc4 <udisks_drive_ata_get_smart_enabled+20>:  48 89 df                mov    %rbx,%rdi
    0x00007ffff7034fc7 <udisks_drive_ata_get_smart_enabled+23>:  5b                      pop    %rbx
    0x00007ffff7034fc8 <udisks_drive_ata_get_smart_enabled+24>:  48 8b 80 a0 00 00 00    mov    0xa0(%rax),%rax                       <<<<<<<<
    0x00007ffff7034fcf <udisks_drive_ata_get_smart_enabled+31>:  ff e0                   jmp    *%rax
    0x00007ffff7034fd1:  66 2e 0f 1f 84 00 00 00 00 00   cs nopw 0x0(%rax,%rax,1)
    0x00007ffff7034fdb:  0f 1f 44 00 00  nopl   0x0(%rax,%rax,1)
End of assembler dump.

   9305  gboolean
   9306  udisks_drive_ata_get_smart_enabled (UDisksDriveAta *object)
   9307  {
   9308    return UDISKS_DRIVE_ATA_GET_IFACE (object)->get_smart_enabled (object);
   9309  }


[56] https://gitlab.gnome.org/GNOME/gnome-disk-utility/-/issues/56

[1] https://wiki.debian.org/HowToGetABacktrace