- When did it start?
When I got my websites back up and running on 24.04. I had the new
version for about 3 weeks, but I have no clue whether it would happen
before that since the websites were not running yet and no crashes
occurred.
So I did not see an upgrade between the time I got the sites running and
started to see these crashes. However, I installed a few additional
modules (see complete list below).
- Can you test on 24.10?
Well... not directly. I only have 24.04 and for my main server, I don't
use intermediate versions (too much work). I could install a VM, but
then it would probably not be the same and it would make the setup more
complicated (i.e. have to forward the Apache requests to the VM and
back...)
- Compile without FORITFY_SOURCE?
I would imagine that this way we could at least see whether that fixes
the issue. But it would indeed not prove much. It would be cool to know
why that very function gets called or rather which URL generates the
error. I don't see how I could determine that at the moment. Also the
crash did not happen for a couple of days... but I'm not holding my
breath.
When recompiling locally, can we generate a package? If so, that would
be fine. I could change the version slightly (like add a letter at the
end) and install that package.
Would it be possible to recompile with the version in 24.10? Then we
could see whether that crashes (but still run 24.04 as the main OS,)
would that make any sense? Or just compile the latest Apache2 source on
24.04 but still apply the Ubuntu available patches?
- New occurrence
It happened again this morning (Sat Apr 19) and this time it's a
different location (crc32_z in libz.) However, same signal (SIGBUS). So
definitely some memory allocation issues / buffer overflow of some sort.
I'll be rebooting so maybe it will be better after that event, although,
I doubt that.
The instruction was a simple:
mov 0x20(%rcx), %rbx
And %rcx is 0x7f45126cb000, which looks like the start of a 4K page...
The error.log has this line:
[Sat Apr 19 07:20:34.565773 2025] [core:notice] [pid 1046102] AH00051:
child pid 1635807 exit signal Bus error (7), possible coredump in
/etc/apache2
Around the same time, I found this line (anonymized URL):
[Sat Apr 19 07:20:30.521369 2025] [ssl:info] [pid 1635807] [client
127.0.0.1:50542] AH01964: Connection to child 14 established (server
example.com:443)
In that same file, I see these errors once in a while:
[Sat Apr 19 06:00:59.321317 2025] [ssl:info] [pid 1635807] (70014)End of
file found: [client 127.0.0.1:53594] AH01992: SSL library error 6
reading data
I'm afraid my other logs do not include the PID so I could not find
anything with actual full URLs (not just a domain).
I'm also sending the crash reports with the normal Ubuntu system. Would
you need something from me to make it easier to find those reports?
---
List of INSTALLED modules:
$ ls /etc/apache2/mods-available/
access_compat.load authz_user.load dir.load
log_debug.load proxy_connect.load session_crypto.load
actions.conf autoindex.conf dump_io.load
log_forensic.load proxy_express.load session_dbd.load
actions.load autoindex.load echo.load lua.load
proxy_fcgi.load session.load
alias.conf brotli.load env.load macro.load
proxy_fdpass.load setenvif.conf
alias.load buffer.load expires.load md.load
proxy_ftp.conf setenvif.load
allowmethods.load cache_disk.conf ext_filter.load mime.conf
proxy_ftp.load slotmem_plain.load
asis.load cache_disk.load file_cache.load mime.load
proxy_hcheck.load slotmem_shm.load
auth_basic.load cache.load filter.load
mime_magic.conf proxy_html.conf socache_dbm.load
auth_digest.load cache_socache.load headers.load
mime_magic.load proxy_html.load socache_memcache.load
auth_form.load cern_meta.load heartbeat.load
mpm_event.conf proxy_http2.load socache_redis.load
authn_anon.load cgid.conf heartmonitor.load
mpm_event.load proxy_http.load socache_shmcb.load
authn_core.load cgid.load http2.conf
mpm_prefork.conf proxy.load speling.load
authn_dbd.load cgi.load http2.load
mpm_prefork.load proxy_scgi.load ssl.conf
authn_dbm.load charset_lite.load ident.load
mpm_worker.conf proxy_uwsgi.load ssl.load
authn_file.load data.load imagemap.load
mpm_worker.load proxy_wstunnel.load status.conf
authn_socache.load dav_fs.conf include.load
negotiation.conf ratelimit.load status.load
authnz_fcgi.load dav_fs.load info.conf
negotiation.load reflector.load substitute.load
authnz_ldap.load dav.load info.load perl.load
remoteip.load suexec.load
authz_core.load dav_lock.load lbmethod_bybusyness.load php8.3.conf
reqtimeout.conf unique_id.load
authz_dbd.load dbd.load lbmethod_byrequests.load php8.3.load
reqtimeout.load userdir.conf
authz_dbm.load deflate.conf lbmethod_bytraffic.load
proxy_ajp.load request.load userdir.load
authz_groupfile.load deflate.load lbmethod_heartbeat.load
proxy_balancer.conf rewrite.load usertrack.load
authz_host.load dialup.load ldap.conf
proxy_balancer.load sed.load vhost_alias.load
authz_owner.load dir.conf ldap.load proxy.conf
session_cookie.load xml2enc.load
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https://bugs.launchpad.net/bugs/2107254
Title:
Apache2 crashes with SIGBUS in mod_ssl
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