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Posted to bugs@httpd.apache.org by bu...@apache.org on 2016/07/13 22:26:38 UTC
[Bug 59854] New: Apache is giving Segfault Error
https://bz.apache.org/bugzilla/show_bug.cgi?id=59854
Bug ID: 59854
Summary: Apache is giving Segfault Error
Product: Apache httpd-2
Version: 2.4.10
Hardware: PC
OS: Mac OS X 10.1
Status: NEW
Severity: normal
Priority: P2
Component: All
Assignee: bugs@httpd.apache.org
Reporter: sarathjohn@google.com
Hi,
We are on Apache 2.4.10 on Ubuntu Machine and with ModSecurity Enabled.
We are using apache to proxy pass our request to backend server. But
We are getting Segmentation Error. Could you please check what is the issue
here ?
AH00052: child pid 26861 exit signal Segmentation fault (11)
[Wed Jul 13 18:02:57.120992 2016] [core:notice] [pid 26794:tid 139648044341120]
AH00052: child pid 26890 exit signal Segmentation fault (11)
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[Bug 59854] Apache is giving Segfault Error
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=59854
Jacob Champion <ch...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEEDINFO |RESOLVED
Resolution|--- |INVALID
--- Comment #7 from Jacob Champion <ch...@gmail.com> ---
Thanks for the stack trace.
It looks like the crash is within a third-party module called mod_google_sso,
which we don't maintain. That doesn't necessarily mean that the crash is that
module's fault, but you'll need to consult with its authors for further
investigation and analysis. We can't really help much with third-party code.
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[Bug 59854] Apache is giving Segfault Error
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=59854
--- Comment #6 from sarathjohn@google.com ---
apache2-dbg is already there
sudo apt-get install apache2-dbg
Reading package lists... Done
Building dependency tree
Reading state information... Done
apache2-dbg is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
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[Bug 59854] Apache is giving Segfault Error
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=59854
--- Comment #5 from sarathjohn@google.com ---
apache2-dbg is already there
sudo apt-get install apache2-dbg
Reading package lists... Done
Building dependency tree
Reading state information... Done
apache2-dbg is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
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[Bug 59854] Apache is giving Segfault Error
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=59854
Eric Covener <co...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |NEEDINFO
--- Comment #1 from Eric Covener <co...@gmail.com> ---
https://httpd.apache.org/dev/debugging.html
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[Bug 59854] Apache is giving Segfault Error
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=59854
--- Comment #4 from sarathjohn@google.com ---
(gdb) backtrace
#0 0x00007fdc58fac080 in ?? () from /usr/lib/apache2/modules/mod_ssl.so
#1 0x00007fdc5b87a826 in ?? () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0
#2 0x00007fdc5b91bf51 in ?? () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0
#3 0x00007fdc5b91ff1a in ?? () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0
#4 0x00007fdc5b9200f5 in ASN1_item_free () from
/lib/x86_64-linux-gnu/libcrypto.so.1.0.0
#5 0x00007fdc5bc0a19d in ExtractKey(request_rec const*,
com::google::security::corplogin::rp::CertChain const&, apr_pool_t*,
evp_pkey_st**) ()
from /usr/lib/apache2/modules/mod_google_sso.so
#6 0x00007fdc5bc09f0b in LoadKeys(request_rec const*, mode_v2_keys*) () from
/usr/lib/apache2/modules/mod_google_sso.so
#7 0x00007fdc5bc09b49 in CheckKeys(request_rec const*) () from
/usr/lib/apache2/modules/mod_google_sso.so
#8 0x00007fdc5bc0b08b in VerifySigKeys(request_rec*, char const*, int, char
const*, char const*) () from /usr/lib/apache2/modules/mod_google_sso.so
#9 0x00007fdc5bc0bdca in ParseAndVerifyProtoTicket(request_rec*, char const*,
login_ticket*) () from /usr/lib/apache2/modules/mod_google_sso.so
#10 0x00007fdc5bc0bf57 in ParseTicket(request_rec*, char const*, login_ticket*)
() from /usr/lib/apache2/modules/mod_google_sso.so
#11 0x00007fdc5bc0e5d1 in GssoUser(request_rec*) () from
/usr/lib/apache2/modules/mod_google_sso.so
#12 0x00007fdc5f1d28e0 in ap_run_check_user_id (r=0x7fdc58c470a0) at
request.c:80
#13 0x00007fdc5f1d5cc7 in ap_process_request_internal
(r=r@entry=0x7fdc58c470a0) at request.c:244
#14 0x00007fdc5f1f20b8 in ap_process_async_request (r=0x7fdc58c470a0) at
http_request.c:315
#15 0x00007fdc5f1eef10 in ap_process_http_async_connection (c=0x7fdc58c4e330)
at http_core.c:143
#16 ap_process_http_connection (c=0x7fdc58c4e330) at http_core.c:228
#17 0x00007fdc5f1e5bf0 in ap_run_process_connection (c=0x7fdc58c4e330) at
connection.c:41
#18 0x00007fdc5a68ab07 in process_socket (my_thread_num=0,
my_child_num=<optimized out>, cs=0x7fdc58c4e2a8, sock=<optimized out>,
p=<optimized out>, thd=<optimized out>) at event.c:1035
#19 worker_thread (thd=<optimized out>, dummy=<optimized out>) at event.c:1875
#20 0x00007fdc5e6b4184 in start_thread () from
/lib/x86_64-linux-gnu/libpthread.so.0
#21 0x00007fdc5e3e137d in clone () from /lib/x86_64-linux-gnu/libc.so.6
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[Bug 59854] Apache is giving Segfault Error
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=59854
--- Comment #2 from sarathjohn@google.com ---
gdb /usr/sbin/apache2 /var/cache/apache2/core
GNU gdb (GDB) 7.9-gg19
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-grtev4-linux-gnu".
Type "show configuration" for configuration details.
<http://go/gdb-home FAQ: http://go/gdb-faq Email: c-toolchain-team IRC: gdb>
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word".
Reading symbols from /usr/sbin/apache2...Reading symbols from
/usr/lib/debug//usr/sbin/apache2...done.
Unable to determine compiler version.
Skipping loading of libstdc++ pretty-printers for now.
done.
Non-google3 binary detected.
[New LWP 2323]
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[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/grte/v4/lib64/libthread_db.so.1".
Core was generated by `/usr/sbin/apache2 -k start'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00007fdc58fac080 in ?? () from /usr/lib/apache2/modules/mod_ssl.so
(gdb)
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[Bug 59854] Apache is giving Segfault Error
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=59854
--- Comment #3 from Jacob Champion <ch...@gmail.com> ---
Is that all that gdb gives you? If you issue a `backtrace` command at the gdb
prompt, does it give you more than one line?
Also, installing the apache2-dbg package may help resolve the "??" lines in the
backtrace output.
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