lsdvd crashed with SIGSEGV in __libc_start_main()

[wilbur.harvey]

Binary package hint: lsdvd

System is AMD64
Karmic with latest updates as of this morning
lsdvd /dev/sr0, then crash

ProblemType: Crash
Architecture: amd64
Date: Thu Sep 3 07:48:16 2009
Dependencies:
 findutils 4.4.2-1
 gcc-4.4-base 4.4.1-3ubuntu3
 libc6 2.10.1-0ubuntu8
 libdvdread4 4.1.3-5ubuntu1
 libgcc1 1:4.4.1-3ubuntu3
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/lsdvd
NonfreeKernelModules: nvidia
Package: lsdvd 0.16-3ubuntu1
ProcCmdline: lsdvd /dev/dvd5
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.31-9.29-generic
SegvAnalysis:
 Segfault happened at: 0x400eb0 <fwrite@plt+264>: movzbl 0x3(%rdi),%r8d
 PC (0x00400eb0) ok
 source "0x3(%rdi)" (0x00000028) not located in a known VMA region (needed readable region)!
 destination "%r8d" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: lsdvd
StacktraceTop:
 ?? ()
 ?? ()
 __libc_start_main () from /lib/libc.so.6
 ?? ()
 ?? ()
Title: lsdvd crashed with SIGSEGV in __libc_start_main()
Uname: Linux 2.6.31-9-generic x86_64
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin netdev plugdev pulse pulse-access sambashare src tape vboxusers video voice

[Alex Bennée (ajbennee)]

Is this a disk that has worked before? I'm completely guessing as I don't have lsdvd on any Ubuntu systems, but on other systems I've seen crashes with interesting discs. I'd done a hacky patch to it to make it slightly more robust:

commit aadfb3181c94b6e1ee1708fd256df5654e5533a4
Author: Alex Bennee <email address hidden>
Date: Thu Aug 21 11:59:02 2008 +0100

    Make the main loop more robust to NULL ifos (which may be a libdvd bug or a side effect of ARccOS disks)

diff --git a/lsdvd.c b/lsdvd.c
index 1c4771f..d7f60c8 100644
--- a/lsdvd.c
+++ b/lsdvd.c
@@ -225,7 +225,7 @@ int main(int argc, char *argv[])
 {
        char title[33];
        dvd_reader_t *dvd;
- ifo_handle_t *ifo_zero, **ifo;
+ ifo_handle_t *ifo_zero, **ifo, *current_ifo;
        pgcit_t *vts_pgcit;
        vtsi_mat_t *vtsi_mat;
        vmgi_mat_t *vmgi_mat;
@@ -322,10 +322,19 @@ int main(int argc, char *argv[])
        for (j=0; j < titles; j++)
        {

- if ( opt_t == j+1 || opt_t == 0 ) {
-
- // GENERAL
- if (ifo[ifo_zero->tt_srpt->title[j].title_set_nr]->vtsi_mat) {
+ if ( opt_t == j+1 || opt_t == 0 )
+ {
+
+ // GENERAL
+ current_ifo = ifo[ifo_zero->tt_srpt->title[j].title_set_nr];
+ fprintf(stderr,"title %d, title_set_nr=%d => ifo %p\n",
+ j,
+ ifo_zero->tt_srpt->title[j].title_set_nr,
+ current_ifo);
+
+ if (current_ifo && current_ifo->vtsi_mat)
+ {
+// if (ifo[ifo_zero->tt_srpt->title[j].title_set_nr]->vtsi_mat) {

                dvd_info.titles[j].enabled = 1;

[Apport retracing service (apport)]

StacktraceTop:?? ()
?? ()
__libc_start_main (main=<value optimized out>,
?? ()
?? ()

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Jamin W. Collins (jcollins)]

I too am seeing this behavior with the new Thor DVD. I've tried the referenced patch in comment #2, but it has no affect on the application behavior.

$ lsdvd
libdvdread: Using libdvdcss version 1.2.10 for DVD access
No VTS_TMAPT available - skipping.
Segmentation fault (core dumped)