kernel: twonkymediaserv[14856]: segfault at b7fa7fe0 ip 0806

[Delta-FM]

Hi,

I am trying to get TwonkyMediaServer working on a Fedora 11 PC. Up to now I have tried two version 4.4.11 and 5.0.68 but both versions give a segmentation fault (from /var/log/messages: Sep 28 20:58:09 <machinename> kernel: twonkymediaserv[14856]: segfault at b7fa7fe0 ip 0806a39b sp b7fa7fe4 error 6 in twonkymediaserver[8048000+6b000]).

Is there a solution?

[mgillespie]

I used to see similar problems on my ARM system, and managed to narrow it down to the convert plugin, and some missing runtime dependencies, however the problem went away, as I suspect some other application update brought in the missing libraries or dependencies.

have you tried renaming convert and see if the server starts? Does it segfault instantly on startup?

[Delta-FM]

Thanks for your answer and sorry for my late response, I did not have the notification switched on .

I do not see a 'convert' plugin, the only plugins I see are (in the plugin dir):

• itunes-import
  itunes-import.plugin
  shoutcast-import
  shoutcast-import.plugin

But... meanwhile I narrowed the problem down to being not 'root'. So Twonky will run properly when started as root (but certainly I will not do that normally). I would like to run Twonky as user 'twonky', so the ownership of the files is transferred but this is not enough obviously. What am I missing?

[mgillespie]

I just tried running mine as a user, and did not have any issues. By default the server tries to access /var/twonkymedia Does the Twonky user have full access to this directory?

You might also want to relocate everything from /var/twonkymedia by using the -appdata commandline switch.
perhaps give it the same directory as where the twonkymedia executable is located.

If you do come across more details of the problem, i'm sure the Twonky engineers would be interested in knowing, so please post any results here.

[Delta-FM]

The dir /var/twonkymedia did not exist indeed, I created it and gave the access rights to user 'twonky' but nothing changed.

I've started Twonky using 'strace' but it does give me any clue, may be you or someone else?

Code: Select all

bash-4.0$ /usr/bin/strace /usr/bin/twonky/twonkymedia -inifile /usr/bin/twonky/twonkymedia.ini
execve("/usr/bin/twonky/twonkymedia", ["/usr/bin/twonky/twonkymedia", "-inifile", "/usr/bin/twonky/twonkymedia.ini"], [/* 21 vars */]) = 0
brk(0)                                  = 0x900b000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=67442, ...}) = 0
mmap2(NULL, 67442, PROT_READ, MAP_PRIVATE, 3, 0) = 0xfe3000
close(3)                                = 0
open("/lib/libpthread.so.0", O_RDONLY)  = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0P\251\227\0004\0\0\0\350"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=140408, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x8b5000
mmap2(0x976000, 106976, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x976000
mprotect(0x98c000, 4096, PROT_NONE)     = 0
mmap2(0x98d000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x16) = 0x98d000
mmap2(0x98f000, 4576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x98f000
close(3)                                = 0
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300\213~\0004\0\0\0\354"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1803428, ...}) = 0
mmap2(0x7d2000, 1509672, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x110000
mmap2(0x27b000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x16b) = 0x27b000
mmap2(0x27e000, 10536, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x27e000
close(3)                                = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xe2f000
set_thread_area({entry_number:-1 -> 6, base_addr:0xe2f6c0, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0x27b000, 8192, PROT_READ)     = 0
mprotect(0x98d000, 4096, PROT_READ)     = 0
mprotect(0x7ce000, 4096, PROT_READ)     = 0
munmap(0xfe3000, 67442)                 = 0
set_tid_address(0xe2f728)               = 10401
set_robust_list(0xe2f730, 0xc)          = 0
futex(0xbfd60f10, FUTEX_WAKE_PRIVATE, 1) = 0
futex(0xbfd60f10, 0x189 /* FUTEX_??? */, 1, NULL, bfd60f20) = -1 EAGAIN (Resource temporarily unavailable)
rt_sigaction(SIGRTMIN, {0x97a340, [], SA_SIGINFO}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0x97a840, [], SA_RESTART|SA_SIGINFO}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=10240*1024, rlim_max=RLIM_INFINITY}) = 0
uname({sys="Linux", node="computername", ...}) = 0
clone(TwonkyMedia Version 4.4.11
LOG_SYSTEM: reading ini file: "/usr/bin/twonky/twonkymedia.ini".
child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0xe2f728) = 10402
exit_group(0) 

Also with the -appdata option ( /usr/bin/twonky/twonkymedia -inifile /usr/bin/twonky/twonkymedia.ini -appdata /usr/bin/twonky/), Twonky will not work.

Is there a debug option in Twonky?

[mgillespie]

only the -v 4095 option. (or adding v=4095 to the INI file).

[Delta-FM]

Meanwhile I found it... On one of the sub-dirs I accidentally removed the 'x' permission...

[mgillespie]

Meanwhile I found it... On one of the sub-dirs I accidentally removed the 'x' permission...

On one of the folders in the Twonkymedia application directory?

Just tried reproducing this problem here, and I can't get it to do it by removing the execute permission here..

Code: Select all

root@sheeva:/usr/local/twonkymedia# chmod -Rc -x cgi-bin/
root@sheeva:/usr/local/twonkymedia# chmod -Rc -x resources/
root@sheeva:/usr/local/twonkymedia# chmod -Rc -x plugins/
root@sheeva:/usr/local/twonkymedia# ./twonkymediaserver
TwonkyMedia Version 5.1.1-RC2
using logfile /tmp/TwonkyMediaServer-log.txt

For image conversion and scaling the TMS utilizes ImageMagick. For details on the license please see ./cgi-bin/convert-readme.txt