http://bugzilla.novell.com/show_bug.cgi?id=617026 http://bugzilla.novell.com/show_bug.cgi?id=617026#c1 Johannes Meixner changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO InfoProvider| |hbs@ks.informatik.uni-kiel. | |de --- Comment #1 from Johannes Meixner 2010-06-24 10:10:57 UTC --- I do not exactly understand what you mean with: "This crash ... did not happen with later 1.4 versions installed." Do you mean that the crash happens only for the one exact cups-1.4.4-48.1.i586 version from the Printing repository but does no longer happen if you install another cups-1.4.4-xxx.yyy.i586 version from whatever other repository? Which exact CUPS 1.4.4 version from which exact repository do you currently have installed on which openSUSE version and when exactly happens the crash for you? -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

http://bugzilla.novell.com/show_bug.cgi?id=617026 http://bugzilla.novell.com/show_bug.cgi?id=617026#c3 Johannes Meixner changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P5 - None |P2 - High CC| |bnc-team-mozilla@forge.prov | |o.novell.com, | |wolfgang@rosenauer.org Component|Printing |Printing Platform|i586 |All Version|Final |Factory Product|openSUSE 11.2 |openSUSE 11.3 OS/Version|openSUSE 11.2 |openSUSE 11.3 --- Comment #3 from Johannes Meixner 2010-06-24 10:39:32 UTC --- Firefox crashes for me too as describend in comment #0 both on i386 and on x86_64 also on openSUSE Factory. Hello Mozilla team, could you help me here and have a look at the mozilla crash report, see comment #0 The most suspicious change in CUPS 1.4.4 seems to be (from the CUPS 1.4.4 CHANGES.txt file): ----------------------------------------------------------------- The OpenSSL interfaces have been made thread-safe and the GNU TLS interface is explicitly forbidden when threading is enabled (STR #3461) ----------------------------------------------------------------- where STR #3461 is http://www.cups.org/str.php?L3461 which explicitely mentions Firefox and links to some bug reports at redhat.com in particular https://bugzilla.redhat.com/show_bug.cgi?id=553834#c43 Could you provide some background info which could help me to better understand what goes on here? -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

http://bugzilla.novell.com/show_bug.cgi?id=617026 http://bugzilla.novell.com/show_bug.cgi?id=617026#c4 Johannes Meixner changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jsmeix@novell.com AssignedTo|jsmeix@novell.com |gjhe@novell.com Summary|Firefox and thunderbird |Firefox print dialog leads |crash in page setup and |to SEGFAULT in SSL |print dialog with CUPS |SSL_load_error_strings() |1.4.4 |with CUPS 1.4.4 --- Comment #4 from Johannes Meixner 2010-06-24 15:10:07 UTC --- When I run Firefox in gdb with debuginfo packages for libopenssl1_0_0 and CUPS installed I get (long lines wrapped here): ------------------------------------------------------------------------- gdb /usr/lib64/firefox/firefox .. (gdb) r .. Program received signal SIGSEGV, Segmentation fault. __pthread_mutex_lock (mutex=0x28) at pthread_mutex_lock.c:50 50 unsigned int type = PTHREAD_MUTEX_TYPE (mutex); (gdb) bt #0 __pthread_mutex_lock (mutex=0x28) at pthread_mutex_lock.c:50 #1 0x00007fffe56ce9db in int_err_get (create=1) at err.c:354 #2 0x00007fffe56ce72b in int_err_set_item (d=0x7fffe59a2640) at err.c:402 #3 0x00007fffe56ce35c in err_load_strings (lib=0, str=0x7fffe59a2640) at err.c:676 #4 0x00007fffe56ceb51 in ERR_load_ERR_strings () at err.c:662 #5 0x00007fffe56cfaa9 in ERR_load_crypto_strings () at err_all.c:110 #6 0x00007fffe620e519 in SSL_load_error_strings () at ssl_err2.c:66 #7 0x00007fffdc9d0c9b in httpInitialize () at http.c:1248 #8 0x00007fffdc9d0df5 in _httpCreate (host=0x7fffdcc3a189 "localhost", port=631, encryption=HTTP_ENCRYPT_IF_REQUESTED) at http.c:463 .. (gdb) #8 0x00007fffdc9d0df5 in _httpCreate (host=0x7fffdcc3a189 "localhost", port=631, encryption=HTTP_ENCRYPT_IF_REQUESTED) at http.c:463 463 httpInitialize(); (gdb) list 458 host, port, encryption)); 459 460 if (!host) 461 return (NULL); 462 463 httpInitialize(); 464 465 /* 466 * Lookup the host... 467 */ (gdb) down #7 0x00007fffdc9d0c9b in httpInitialize () at http.c:1248 1248 SSL_load_error_strings(); (gdb) list 1243 #elif defined(HAVE_LIBSSL) 1244 /* 1245 * Initialize OpenSSL... 1246 */ 1247 1248 SSL_load_error_strings(); 1249 SSL_library_init(); 1250 1251 /* 1252 * Set the threading callbacks... (gdb) ------------------------------------------------------------------------- I.e. the call of SSL_load_error_strings() leads to the segfault. According to the OpenSSL documentaion at https://www.openssl.org/docs/ssl/SSL_library_init.html ------------------------------------------------------------------------- EXAMPLES A typical TLS/SSL application will start with the library initialization, and provide readable error messages. SSL_load_error_strings(); /* readable error messages */ SSL_library_init(); /* initialize library */ ------------------------------------------------------------------------- from my non-expert point of view CUPS initializes OpenSSL correctly so that it seems the root cause is not in CUPS. At least for now I like to re-assign the issue to the OpenSSL maintainer so that he could have a look... -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

http://bugzilla.novell.com/show_bug.cgi?id=617026 http://bugzilla.novell.com/show_bug.cgi?id=617026#c6 Johannes Meixner changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |ASSIGNED CC| |gjhe@novell.com InfoProvider|bnc-team-mozilla@forge.prov | |o.novell.com | AssignedTo|gjhe@novell.com |jsmeix@novell.com Summary|Firefox print dialog leads |Printing from Mozilla.org |to SEGFAULT in SSL |applications (e.g. Firefox) |SSL_load_error_strings() |lead to SEGFAULT via |with CUPS 1.4.4 |OpenSSL with CUPS 1.4.4 --- Comment #6 from Johannes Meixner 2010-06-24 16:38:45 UTC --- The "Printing from Firefox crashes since CUPS 1.4.4" mails at cups@easysw.com explain it, see http://www.cups.org/newsgroups.php?gcups.general+T+Q"Printing+from+Firefox+crashes+since+CUPS+1.4.4" in particular Michael Sweet's reply: ------------------------------------------------------------------------ Firefox dlopen's and dlclose's libcups - after dlclose'ing libcups the function pointers used by libcups for SSL support point to invalid addresses and you get a crash. This also affects Thunderbird and presumably any other Mozilla.org application that prints. STR #3605 is a placeholder bug for changes we'll need to make once GNU TLS and OpenSSL add native threading support to their respective libraries: http://www.cups.org/str.php?L3605 In the meantime you can back out the changes added in STR #3461 to revert to the previous (and apparently unsafe) usage of OpenSSL from multiple threads. ------------------------------------------------------------------------ I will revert the changes added in STR #3461 in CUPS 1.4.4 as a band-aid workaround to avoid the root causes both in Mozilla.org applications (dlopen...dlclose...dlopen of libcups) and in OpenSSL (no native threading support). -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

http://bugzilla.novell.com/show_bug.cgi?id=617026 http://bugzilla.novell.com/show_bug.cgi?id=617026#c8 --- Comment #8 from Henrik Schmidt 2010-06-24 18:37:24 UTC --- I'm on vacation for 2 weeks so can not help testing the fix. -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

http://bugzilla.novell.com/show_bug.cgi?id=617026 http://bugzilla.novell.com/show_bug.cgi?id=617026#c10 Johannes Meixner changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED Target Milestone|--- |RC 2 --- Comment #10 from Johannes Meixner 2010-06-25 10:30:43 UTC ---

From my current point of view the bug is fixed now.

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