Bug #1898
segfault on startup (initial scan)
100%
Description
Hi, I am having problem resulting in crashing of the tvheadend process. When I start the backend, it is doing the initial scan (I can see it over the browser) but once a client is connecting to it (xbmc pvr openelec@rspb) it is causing following crash:
Dec 29 19:03:58 tvhe tvheadend[26169]: subscription: 'initscan' subscribing to mux, weight: 2, adapter: '/dev/dvb/adapter3/frontend0', network: 'Astra_23_5E', mux: '11973V' Dec 29 19:03:58 tvhe tvheadend[26169]: htsp: Got connection from 192.168.180.49 Dec 29 19:03:58 tvhe tvheadend[26169]: htsp: 192.168.180.49: Welcomed client software: XBMC Media Center (HTSPv8) Dec 29 19:03:58 tvhe tvheadend[26169]: htsp: 192.168.180.49 [ XBMC Media Center ]: Disconnected Dec 29 19:03:58 tvhe tvheadend[26169]: htsp: 192.168.180.49: Welcomed client software: XBMC Media Center (HTSPv8) Dec 29 19:03:58 tvhe tvheadend[26169]: htsp: 192.168.180.49 [ XBMC Media Center ]: Disconnected Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: Signal: 11 in PRG: /usr/bin/tvheadend (3.9.304~gc50b049) [63d237a1720988789d505aacb4ad8f5638475a9f] CWD: / Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: Fault address 0x38 (Address not mapped) Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: Loaded libraries: /usr/lib/x86_64-linux-gnu/libssl.so.1.0.0 /usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0 /lib/x86_64-linux-gnu/libz.so.1 /usr/lib/x86_64-linux-gnu/libcurl-gnutls.so.4 /usr/lib/liburiparser.so.1 /usr/lib/x86_64-linux-gnu/libavahi-common.so.3 /usr/lib/x86_64-linux-gnu/libavahi-client.so.3 /usr/lib/x86_64-linux-gnu/libavcodec.so.53 /usr/lib/x86_64-linux-gnu/libavutil.so.51 /usr/lib/x86_64-linux-gnu/libavformat.so.53 /usr/lib/x86_64-linux-gnu/libswscale.so.2 /lib/x86_64-linux-gnu/librt.so.1 /lib/x86_64-linux-gnu/libdl.so.2 /lib/x86_64-linux-gnu/libpthread.so.0 /lib/x86_64-linux-gnu/libm.so.6 /lib/x86_64-linux-gnu/libc.so.6 /usr/lib/x86_64-linux-gnu/libidn.so.11 /usr/lib/x86_64-linux-gnu/libssh2.so.1 /usr/lib/x86_64-linux-gnu/liblber-2.4.so.2 /usr/lib/x86_64-linux-gnu/libldap_r-2.4.so.2 /usr/lib/x86_64-linux-gnu/libgssapi_krb5.so.2 /usr/lib/x86_64-linux-gnu/libgnutls.so.26 /lib/x86_64-linux-gnu/libgcrypt.so.11 /usr/lib/x86_64-linux-gnu/librtmp.so.0 /lib/x86_64-linux-gnu/libdbus-1.so.3 /usr/ Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: Register dump [23]: 00007f9a38000088feff38332d2f373000000000006c2be00000000000000202000000000000000200007f9a380072c000000000ffffffff00000000006add1000007f9a380192c50000000000484003000000000000000000007f9a38007180000000000000000000007f9a380192c0000000000050535400007f9a3fdd2660000000000041f756000000000001020200000000000000330000000000000004000000000000000efffffffe7ffbfa170000000000000038 Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: STACKTRACE Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: /tvhe/tvheadend/src/trap.c:143 0x42a546 Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: ??:0 0x7f9a5f19f030 Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: /tvhe/tvheadend/src/htsp_server.c:2160 0x41f756 Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: /tvhe/tvheadend/src/tcp.c:624 0x40eca2 Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: /tvhe/tvheadend/src/api/api_status.c:88 0x431063 Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: /tvhe/tvheadend/src/webui/webui_api.c:43 0x448f59 Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: /tvhe/tvheadend/src/http.c:348 0x40f8cd Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: /tvhe/tvheadend/src/http.c:379 0x40fcf3 Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: /tvhe/tvheadend/src/http.c:457 0x40fe82 Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: /tvhe/tvheadend/src/http.c:758 0x41036d Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: /tvhe/tvheadend/src/tcp.c:442 0x40e18e Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: /tvhe/tvheadend/src/wrappers.c:103 0x40c4f8 Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: ??:0 0x7f9a5f196b50 Dec 29 19:03:58 tvhe kernel: [104205.098998] tcp_server_star[26376]: segfault at 38 ip 000000000041f756 sp 00007f9a3fdd2660 error 4 in tvheadend[400000+ae000] Dec 29 19:03:58 tvhe tvheadend[26169]: CRASH: clone+0x6d (/lib/x86_64-linux-gnu/libc.so.6)
Unfortunatelly it doesn't creates core dump. The initial scan takes on 3 sattelites really long and to reproduce the error sometimes I have to reboot the xbmc client, sometimes it comes along (running openelec 3.2.4 with TVHeadend HTSP Client 1.6.19)
Disabling the initial scan on all networks solves that issue for me.
Files
History
Updated by Miro K. almost 11 years ago
Updated by - File tvheadend tvheadend added
- File core-tcp_server_star-11-105-44-7856-1388357669 core-tcp_server_star-11-105-44-7856-1388357669 added
I updated to the latest version 3.9.305~g9a3ad1c as I noticed there is support for coredumps. So here is the coredump.
Updated by Adam Sutton almost 11 years ago
Updated by - Status changed from New to Accepted
Good to know that option actually works...
I'll see if I can look at that binary, not sure if my system will be compatible, might need to create a VM.
But I have some avenues to investigate.
Thanks.
Updated by Adam Sutton almost 11 years ago
I can see the basic problem. I need to consider the best route to a fix.
Adam
Updated by Miro K. almost 11 years ago
Great, that was quick, I do appreciate 
I was trying to understend linux gdb so am I correct if this is only related to the opened browser (admin) connection to the backend, so if none browser will be connected this issue will not happen?
Updated by Adam Sutton almost 11 years ago
Yes, the problem relates to what happens if a connection HTSP or HTTP is lost at the same instant that a web UI connection queries the status. I think due to the way the code is, it currently only affects if an HTSP connection is lost.
There is a very quick fix, which is to check for the NULL at the appropriate point and stop it from bombing out, but I think that will create a weird looking result in the UI status page (albeit for an instant). So I just want to think it through.
I might just push the quick fix and leave this open.
Adam
Updated by Adam Sutton almost 11 years ago
- Status changed from Accepted to Fixed
- % Done changed from 0 to 100
Applied in changeset tvheadend|commit:dfde2ec4a2e66205b61831248700dcccdd8ca81e.