[Bug 61861] Segmentation fault under load when password is incorrect
https://bz.apache.org/bugzilla/show_bug.cgi?id=61861 --- Comment #7 from Eric Hontz --- Created attachment 36024 --> https://bz.apache.org/bugzilla/attachment.cgi?id=36024&action=edit Valgrind output As I explained, this output seems indecipherable to me, so I probably need to use different Valgrind options. -- You are receiving this mail because: You are the assignee for the bug. - To unsubscribe, e-mail: bugs-unsubscr...@httpd.apache.org For additional commands, e-mail: bugs-h...@httpd.apache.org
[Bug 61861] Segmentation fault under load when password is incorrect
https://bz.apache.org/bugzilla/show_bug.cgi?id=61861 --- Comment #6 from Eric Hontz --- Created attachment 36023 --> https://bz.apache.org/bugzilla/attachment.cgi?id=36023&action=edit core dump -- You are receiving this mail because: You are the assignee for the bug. - To unsubscribe, e-mail: bugs-unsubscr...@httpd.apache.org For additional commands, e-mail: bugs-h...@httpd.apache.org
[Bug 61861] Segmentation fault under load when password is incorrect
https://bz.apache.org/bugzilla/show_bug.cgi?id=61861 Eric Hontz changed: What|Removed |Added Attachment #35588|memory errors under high|backtrace description|load| -- You are receiving this mail because: You are the assignee for the bug. - To unsubscribe, e-mail: bugs-unsubscr...@httpd.apache.org For additional commands, e-mail: bugs-h...@httpd.apache.org
[Bug 61861] Segmentation fault under load when password is incorrect
https://bz.apache.org/bugzilla/show_bug.cgi?id=61861 Eric Hontz changed: What|Removed |Added Status|NEEDINFO|NEW --- Comment #5 from Eric Hontz --- I was able to replicate the issue with Apache 2.4.32. I haven't tried 2.4.33 yet, but the changelog doesn't indicate an LDAP-related fix. I was able to obtain a core dump from a crash, which I'm attaching to this report. Also, I ran httpd with Valgrind, but I got such a ridiculous about of output. I'm pretty sure the command I ran was valgrind --tool=memcheck --undef-value-errors=no --memcheck:leak-check=yes --memcheck:show-reachable=yes /local/ark/pkg/apache/2.4.32/bin/httpd -k start -f /local/ark/pkg/apache/current/conf/httpd.conf I'm not familiar with Valgrind, so I'm probably running with the wrong options. If the Valgrind output is small enough in size to add as an attachment, I'll attach that as well. I plan to do further investigation, like running with the correct Valgrind options to get a more decipherable output and setting the log level to trace8. Unfortunately, I will need to stand up my own LDAP server and point Apache to it, because I can't continue hammering the company's LDAP server with invalid password attempts. Hopefully I will have time for this soon. -- You are receiving this mail because: You are the assignee for the bug. - To unsubscribe, e-mail: bugs-unsubscr...@httpd.apache.org For additional commands, e-mail: bugs-h...@httpd.apache.org
[Bug 61861] Segmentation fault under load when password is incorrect
https://bz.apache.org/bugzilla/show_bug.cgi?id=61861 --- Comment #4 from Luca Toscano --- Hi Eric, any news? -- You are receiving this mail because: You are the assignee for the bug. - To unsubscribe, e-mail: bugs-unsubscr...@httpd.apache.org For additional commands, e-mail: bugs-h...@httpd.apache.org
[Bug 61861] Segmentation fault under load when password is incorrect
https://bz.apache.org/bugzilla/show_bug.cgi?id=61861 --- Comment #3 from Eric Hontz --- Thank you for the reply, Eric! I will await 2.4.32 to see if the concurrency fix solves the problem and report back. If I still experience the issue, I'll provide Valgrind and trace8 info when I report back. Thanks again! -- You are receiving this mail because: You are the assignee for the bug. - To unsubscribe, e-mail: bugs-unsubscr...@httpd.apache.org For additional commands, e-mail: bugs-h...@httpd.apache.org
[Bug 61861] Segmentation fault under load when password is incorrect
https://bz.apache.org/bugzilla/show_bug.cgi?id=61861 Eric Covener changed: What|Removed |Added Status|NEW |NEEDINFO --- Comment #2 from Eric Covener --- 2.4.32 is around the corner and does have an LDAP concurrency fix, but usually it leads to high CPU and not a crash. But, it is probably worth revisiting this if you can. If it doesn't pan out -- could you try to run your scenario under valgrind to potentially make it fail earlier? and/or grab "trace8" output leading to the crash? -- You are receiving this mail because: You are the assignee for the bug. - To unsubscribe, e-mail: bugs-unsubscr...@httpd.apache.org For additional commands, e-mail: bugs-h...@httpd.apache.org
[Bug 61861] Segmentation fault under load when password is incorrect
https://bz.apache.org/bugzilla/show_bug.cgi?id=61861 Eric Hontz changed: What|Removed |Added Summary|"double free or corruption" |Segmentation fault under |under high load when also |load when password is |used with mod_authn_dbd |incorrect --- Comment #1 from Eric Hontz --- I recently confirmed that the crashes are present when only the ldap provider is configured (AuthBasicProvider ldap) but an incorrect password is provided. I've even seen the seg faults when only using a concurency level of 50 with the Apache Benchmark tool (ab -n2000 -c50 ...). Occasionally, after the seg fault happens, all of the threads of a worker will be in the waiting state, and CPU usage will be maxed on the server. Please let me know if there is further information I can provide to help determine the root cause. Thank you. -- You are receiving this mail because: You are the assignee for the bug. - To unsubscribe, e-mail: bugs-unsubscr...@httpd.apache.org For additional commands, e-mail: bugs-h...@httpd.apache.org
