https://bz.apache.org/bugzilla/show_bug.cgi?id=61237
Bug ID: 61237
Summary: apache2 2.4.26 segfaults when http2 module is enabled
Product: Apache httpd-2
Version: 2.4.26
Hardware: PC
OS: Linux
Status: NEW
Severity: regression
Priority: P2
Component: mod_http2
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Hi,
several users have reported that apache2 segfaults usually in PHP when http2
module is enabled in apache2 2.4.26.
The original bugreports are here, I am copying just some traces:
~~~~
Jun 28 16:30:14 mail kernel: [707770.889003] apache2[102233]: segfault at
7f89e25c6010 ip 00007f89e1e8cde0 sp 00007fff56430e00 error 4 in
libapr-1.so.0.5.2 (deleted)[7f89e1e72000+31000]
Jun 28 16:30:44 mail kernel: [707800.310376] apache2[106852]: segfault at
600000001 ip 00007fd3da2df4e2 sp 00007fd3c1d326e8 error 4 in
libphp7.0.so[7fd3da0b1000+392000]
Jun 28 16:30:55 mail kernel: [707812.141281] apache2[107200]: segfault at
600000001 ip 00007fd3da2e0b04 sp 00007fd3c25359b0 error 4 in
libphp7.0.so[7fd3da0b1000+392000]
Jun 28 16:32:06 mail kernel: [707882.272427] apache2[107928]: segfault at
7f6c00000048 ip 00007f6cc1ba3042 sp 00007f6ca9d5a9b0 error 4 in
libphp7.0.so[7f6cc195d000+392000]
Jun 28 16:32:43 mail kernel: [707919.758973] apache2[108367]: segfault at
55c900000036 ip 00007f6cc1c0057a sp 00007f6caa55b9e0 error 4 in
libphp7.0.so[7f6cc195d000+392000]
Jun 28 16:33:32 mail kernel: [707968.278623] apache2[108605]: segfault at
7f6c0000001a ip 00007f6cc1c00548 sp 00007f6ca95576f0 error 4 in
libphp7.0.so[7f6cc195d000+392000]
Jun 28 16:33:37 mail kernel: [707973.490387] apache2[108814]: segfault at
7f6e474ea5a4 ip 00007f6cc1bbdb5f sp 00007f6ca9d5a8d0 error 4 in
libphp7.0.so[7f6cc195d000+392000]
Jun 28 16:33:47 mail kernel: [707984.145976] apache2[107830]: segfault at
3330322e30 ip 00007f6cc1b8cb04 sp 00007f6caad5c710 error 4 in
libphp7.0.so[7f6cc195d000+392000]
Jun 28 16:36:04 mail kernel: [708120.747497] apache2[109092]: segfault at
600000001 ip 00007f6cc1b8cb04 sp 00007f6ca9557570 error 4 in
libphp7.0.so[7f6cc195d000+392000]
Jun 28 16:36:14 mail kernel: [708130.828956] apache2[109624]: segfault at 0 ip
(null) sp 00007f6ca95576e8 error 14 in apache2[55c92a09e000+9e000]
Jun 28 16:37:15 mail kernel: [708191.943459] apache2[109674]: segfault at 1406
ip 00007f6cc1ba2ea1 sp 00007f6ca9557080 error 4 in
libphp7.0.so[7f6cc195d000+392000]
Jun 28 16:38:18 mail kernel: [708254.981575] apache2[110142]: segfault at
600000001 ip 00007f6cc1b8cb04 sp 00007f6ca9559860 error 4 in
libphp7.0.so[7f6cc195d000+392000]
Jun 28 16:38:21 mail kernel: [708257.266126] apache2[110454]: segfault at
60600000000 ip 00007f6cc1b8cb04 sp 00007f6ca9557290 error 4 in
libphp7.0.so[7f6cc195d000+392000]
Jun 28 16:40:55 mail kernel: [708411.291971] apache2[112048]: segfault at
7fe23b4ea5ac ip 00007fe0b5b55bfa sp 00007fe09dd5a8d0 error 4 in
libphp7.0.so[7fe0b58f5000+392000]
Jun 28 16:41:45 mail kernel: [708461.406343] apache2[111959]: segfault at 0 ip
00007fe0b5b3817b sp 00007fe09e55af58 error 4 in
libphp7.0.so[7fe0b58f5000+392000]
Jun 28 16:44:28 mail kernel: [708624.787914] apache2[114082]: segfault at
600000001 ip 00007fe0b5b24b04 sp 00007fe09dd5a860 error 4 in
libphp7.0.so[7fe0b58f5000+392000]
Jun 28 16:44:54 mail kernel: [708650.426822] apache2[114418]: segfault at
7fe23b4ea5a4 ip 00007fe0b5b55bfa sp 00007fe09e55b8d0 error 4 in
libphp7.0.so[7fe0b58f5000+392000]
Jun 28 16:46:07 mail kernel: [708723.584629] apache2[114737]: segfault at
600000001 ip 00007fe0b5b24b04 sp 00007fe09d557570 error 4 in
libphp7.0.so[7fe0b58f5000+392000]
Jun 28 16:47:09 mail kernel: [708785.630073] apache2[115322]: segfault at c ip
00007fe0b5b5cd67 sp 00007fe09d557110 error 4 in
libphp7.0.so[7fe0b58f5000+392000]
Jun 28 16:51:56 mail kernel: [709073.089354] apache2[117357]: segfault at
7fe000000000 ip 00007fe0b5b24b04 sp 00007fe09d5597d0 error 4 in
libphp7.0.so[7fe0b58f5000+392000]
~~~~
~~~~
[Thu Jun 29 06:55:23.235009 2017] [core:notice] [pid 6435] AH00051: child pid
16045 exit signal Segmentation fault (11), possible coredump in /etc/apache2
*** Error in `/usr/sbin/apache2': double free or corruption (fasttop):
0x00007faca40608d0 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x7908b)[0x7facd0d7508b]
/lib/x86_64-linux-gnu/libc.so.6(+0x82c3a)[0x7facd0d7ec3a]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x4c)[0x7facd0d82d2c]
/usr/lib/php/20160303/xdebug.so(xdebug_llist_remove+0x4f)[0x7facc75766af]
/usr/lib/php/20160303/xdebug.so(xdebug_execute_ex+0x474)[0x7facc7566d84]
/usr/lib/apache2/modules/libphp7.1.so(zend_execute+0x188)[0x7faccd1eb458]
/usr/lib/apache2/modules/libphp7.1.so(zend_execute_scripts+0xd3)[0x7faccd1464a3]
/usr/lib/apache2/modules/libphp7.1.so(+0x30805d)[0x7faccd1ed05d]
/usr/sbin/apache2(ap_run_handler+0x40)[0x55e894d0d7c0]
/usr/sbin/apache2(ap_invoke_handler+0xc6)[0x55e894d0dd56]
/usr/sbin/apache2(ap_process_async_request+0x363)[0x55e894d25a33]
/usr/sbin/apache2(ap_process_request+0x10)[0x55e894d25b40]
/usr/lib/apache2/modules/mod_http2.so(+0x26d09)[0x7facce218d09]
/usr/sbin/apache2(ap_run_process_connection+0x40)[0x55e894d17630]
/usr/lib/apache2/modules/mod_http2.so(+0x281d7)[0x7facce21a1d7]
/usr/lib/apache2/modules/mod_http2.so(+0x2b6a3)[0x7facce21d6a3]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76da)[0x7facd10ca6da]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x5f)[0x7facd0e04d7f]
~~~~
~~~~
[Thu Jun 29 09:53:11.623671 2017] [core:notice] [pid 25242] AH00051: child pid
27364 exit signal Segmentation fault (11), possible coredump in
/data01/apacheSegFault
[Thu Jun 29 09:53:14.973912 2017] [core:warn] [pid 25242] AH00045: child
process 27665 still did not exit, sending a SIGTERM
[Thu Jun 29 09:53:16.975994 2017] [core:warn] [pid 25242] AH00045: child
process 27665 still did not exit, sending a SIGTERM
[Thu Jun 29 09:53:18.978067 2017] [core:warn] [pid 25242] AH00045: child
process 27665 still did not exit, sending a SIGTERM
[Thu Jun 29 09:53:20.980150 2017] [core:error] [pid 25242] AH00046: child
process 27665 still did not exit, sending a SIGKILL
[Thu Jun 29 09:53:21.981314 2017] [mpm_prefork:notice] [pid 25242] AH00169:
caught SIGTERM, shutting down
[Thu Jun 29 09:54:13.146363 2017] [wsgi:warn] [pid 28557] mod_wsgi: Compiled
for Python/2.7.11+.
[Thu Jun 29 09:54:13.146393 2017] [wsgi:warn] [pid 28557] mod_wsgi: Runtime
using Python/2.7.12.
[Thu Jun 29 09:54:13.149165 2017] [mpm_prefork:notice] [pid 28557] AH00163:
Apache/2.4.18 (Ubuntu) OpenSSL/1.0.2k mod_wsgi/4.5.2 Python/2.7.12
mod_perl/2.0.9 Perl/v5.22.1 configured -- resuming normal operations
~~~~
+
~~~~
[Thu Jun 29 09:47:20.978227 2017] [http2:warn] [pid 22221] [client
***.***.***.***:65284] AH10020: h2_session(29,IDLE,0): session cleanup
triggered by p
ool cleanup. this should have happened earlier already.
[Thu Jun 29 09:47:20.978244 2017] [http2:warn] [pid 22221] [client
***.***.***.***:65284] AH03199: h2_session(29,IDLE,0): connection disappeared
without
proper goodbye, clients will be confused, should not happen
[Thu Jun 29 09:50:41.725088 2017] [php7:error] [pid 24245] [client
***.***.***.***:55746] PHP Fatal error: Invalid opcode 137/16/8. in
/data01/var/www/prod/vendor/zendframework/zendframework1/library/Zend/Config.php
on line 112, referer: https://lernziele.charite.de/llpMobil/
[Thu Jun 29 09:51:20.074313 2017] [http2:warn] [pid 23933] [client
***.***.***.***:55748] AH10020: h2_session(31,IDLE,0): session cleanup
triggered by pool cleanup. this should have happened earlier already.
~~~~
And here is screenshot from gdb:
https://user-images.githubusercontent.com/195299/27682022-5868e1a6-5cc1-11e7-9c33-cfef81e23ad5.png
It looks like http2 module corrupts memory in other modules (or something like
that).
Ondrej
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