View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0003557 | unreal | ircd | public | 2007-12-20 07:37 | 2009-05-13 06:35 |
| Reporter | Stealth | Assigned To | syzop | ||
| Priority | normal | Severity | crash | Reproducibility | always |
| Status | resolved | Resolution | fixed | ||
| Platform | Linux | OS | Fedora | OS Version | 7 |
| Product Version | 3.2.7 | ||||
| Fixed in Version | 3.2.9-RC1 | ||||
| Summary | 0003557: Crash when reloading modules | ||||
| Description | So far I have only seen this reproducible on my box. Crash happens when a module is overwritten with a new compile (example, when upgrading modules), Unreal crashes when rehashing. This was done on a fresh install | ||||
| Steps To Reproduce | Compile Unreal Make install Copy a module from the source to the install (I used cloak.so) Rehash, either by commandline or as oper | ||||
| Additional Information | =================== START HERE ====================== BACKTRACE: Using host libthread_db library "/lib/libthread_db.so.1". warning: Can't read pathname for load map: Input/output error. Core was generated by `/home/john/Unreal/bin/ircd'. Program terminated with signal 11, Segmentation fault. #0 0x00a3d441 in check_match.8200 () from /lib/ld-linux.so.2 #0 0x00a3d441 in check_match.8200 () from /lib/ld-linux.so.2 #1 0x00a3d8bd in do_lookup_x () from /lib/ld-linux.so.2 #2 0x00a3d9e0 in _dl_lookup_symbol_x () from /lib/ld-linux.so.2 #3 0x00b59b30 in do_sym () from /lib/libc.so.6 #4 0x00b59eca in _dl_sym () from /lib/libc.so.6 #5 0x00ba9e28 in dlsym_doit () from /lib/libdl.so.2 #6 0x00a41c36 in _dl_catch_error () from /lib/ld-linux.so.2 #7 0x00baa2ec in _dlerror_run () from /lib/libdl.so.2 0000008 0x00ba9db3 in dlsym () from /lib/libdl.so.2 #9 0x08063ecb in Module_Create (path_=0x8a759b8 "modules/cloak.so") at modules.c:357 #10 0x0806cbc9 in load_conf (filename=0x809ef66 "unrealircd.conf") at s_conf.c:8016 #11 0x0806ce95 in init_conf (rootconf=0x809ef66 "unrealircd.conf", rehash=1) at s_conf.c:1653 #12 0x0806d2d0 in rehash_internal (cptr=0x8a720c0, sptr=0x8a720c0, sig=0) at s_conf.c:9065 #13 0x0806562f in parse (cptr=0x8a720c0, buffer=0x8a721a4 "REHASH", bufend=0x8a721aa "") at parse.c:440 #14 0x08064a21 in dopacket (cptr=0x8a720c0, buffer=0x80af6a0 "REHASH\n", length=0) at packet.c:138 #15 0x08056d84 in read_message (delay=1, listp=0x812e8a0) at s_bsd.c:1504 #16 0x080602dc in main (argc=1198135858, argv=<value optimized out>) at ircd.c:1597 #0 0x00a3d441 in check_match.8200 () from /lib/ld-linux.so.2 0x8132b40 <backupbuf>: "REHASH" #0 0x00a3d441 in check_match.8200 () from /lib/ld-linux.so.2 No symbol table info available. #1 0x00a3d8bd in do_lookup_x () from /lib/ld-linux.so.2 No symbol table info available. #2 0x00a3d9e0 in _dl_lookup_symbol_x () from /lib/ld-linux.so.2 No symbol table info available. GCC: gcc version 4.1.2 20070925 (Red Hat 4.1.2-27) UNAME: Linux nobeef.x-tab.org 2.6.21-1.3194.fc7 #1 SMP Wed May 23 22:35:01 EDT 2007 i686 athlon i386 GNU/Linux UNREAL: Unreal3.2.7 build 1.1.1.1.2.1.2.1.2.2234.2.676 2007/07/13 10:43:04 CORE: -rw------- 1 john john 1028096 2007-12-19 23:30 core.12491 =================== STOP HERE ====================== | ||||
| Tags | No tags attached. | ||||
| 3rd party modules | |||||
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yep, I have it too |
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354: if ((Mod = irc_dlopen(tmppath, RTLD_NOW))) 355: { 356: /* We have engaged the borg cube. Scan for lifesigns. */ 357: irc_dlsym(Mod, "Mod_Version", Mod_Version); all good... so, no idea. EDIT: line numbers |
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If you think you can get more info by playing with my box, I can get you access |
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Actually rehashing isn't necessary to reproduce it. You can just recompile a single module and overwrite it. Then the crash occurs as soon as the module is called. Example, m_getinfo without rehashing : Program received signal SIGSEGV, Segmentation fault. 0xb7f0298f in m_getinfo (cptr=0x8179af0, sptr=0x8179af0, parc=2, parv=0x811d860) at m_getinfo.c:472 472 if (!IsPerson(sptr) || !IsAnOper(sptr)) |
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I think that this bug is the same with http://svn.ratbox.org/svnroot/ircd-ratbox/trunk/BUGS (detailed description) |
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Ok now I understand why Anope handle their modules that way (a temporary copy of each module) |
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darkwire / capitaine: that isn't the bug, as we already copy the modules (to the tmp/ directory) since 2003... Personally, I reload modules from time to time so I don't have to restart, and this works fine... I just tested it on 3.2.8-rc1: 1) didn't crash, and 2) it used the updated version. |
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Fixed a week+ ago, but couldn't access the bugtracker: - Fixed crash on Linux (with a 'new' dynamic linker) when a module has been updated and then reloaded. From now on we just copy to a tempfile, and never hardlink. (bug 0003557). I experienced this on someones else box, and fortunately this enabled me to trace this nasty issue :) We hardlinked for 'disk space' reasons, but that no longer works... ah well... :) |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2007-12-20 07:37 | Stealth | New Issue | |
| 2007-12-24 12:08 | Bock | Note Added: 0014927 | |
| 2007-12-26 13:15 | syzop | Note Added: 0014933 | |
| 2007-12-26 13:16 | syzop | Note Edited: 0014933 | |
| 2007-12-27 05:05 | Stealth | Note Added: 0014936 | |
| 2008-11-10 17:44 | capitaine | Note Added: 0015422 | |
| 2008-11-20 19:37 | darkwire | Note Added: 0015423 | |
| 2008-11-25 10:16 | capitaine | Note Added: 0015429 | |
| 2009-01-18 17:31 | syzop | Note Added: 0015683 | |
| 2009-05-13 06:35 | syzop | QA | => Not touched yet by developer |
| 2009-05-13 06:35 | syzop | U4: Need for upstream patch | => No need for upstream InspIRCd patch |
| 2009-05-13 06:35 | syzop | Note Added: 0015847 | |
| 2009-05-13 06:35 | syzop | Status | new => resolved |
| 2009-05-13 06:35 | syzop | Fixed in Version | => 3.2.9-RC1 |
| 2009-05-13 06:35 | syzop | Resolution | open => fixed |
| 2009-05-13 06:35 | syzop | Assigned To | => syzop |
