Re: mod_ftp segaults on rheloids
On Fri, 2016-11-11 at 12:10 -0600, William A Rowe Jr wrote: > On Fri, Nov 11, 2016 at 2:24 AM, Benjamin Lefoul <benjamin.lefoul@nwi > se.se> wrote: > > Is this list still active? > > Maybe it was not the right place to ask about mod_ftp? > > It is the place to ask, and was on my list to respond to your > question... > sorry I'm overwhelmed with other code this week. > > The last 'release' is quite dated, and several things changed within > httpd 2.4 that prove incompatible with the last official mod_ftp > 0.9.6 > release. I did try to push out another release, but it never got > enough > votes to be 'released' by the community, and since has undergone > a number of bug fixes to work with the current httpd 2.4.23 (although > it should still be compatible with an older httpd release like > 2.4.6.) > > http://svn.apache.org/repos/asf/httpd/mod_ftp/trunk/ > is the repository of the current source code. The primary defect I'm > aware of in an incompatibility with mod_ftp and the httpd core that > prevents us from successfully serving FTP Explicit SSL connections. > An implicit SSL connection, e.g. ftps on port 990 (using TLS from > the > time of connecting) is functional. > > Once other httpd projects are wrapped up, I'm coming back to httpd > 2.4 and mod_ftp to figure out how to get Explicit SSL functioning > again. > If you would grab the latest development code I'd love to read about > your success or any defects you encounter. > > Cheers, > > Bill Thanks very much for your response and for your work. A functional FTP module is still of interest for many. I'll try to do my best to help and give you feedback when I have time. Benjamin Lefoul > > >
Re: mod_ftp segaults on rheloids
On Fri, 2016-11-11 at 13:22 +0100, Rainer Canavan wrote:
> On Fri, Nov
11, 2016 at 10:27 AM, Benjamin Lefoul
> <benjamin.lef...@nwise.se>
wrote:
> >
> > On Fri, 2016-11-11 at 08:53 +, Nick Kew wrote:
> > >
>
> > Did you build mod_ftp yourself on a distro-provided httpd?
> > Yes.
I did build myself from the latest svn.
> > I installed:
> > httpd-devel-
2.4.6-40.sl7.4.x86_64 from Scientific Linux 7
> > httpd-devel-2.4.6-
40.el7.centos.4.x86_64 on centOS7
> > (so, the same, essentially), as
well as the "Development Tools"
> > group.
>
> If you have a core dump,
try analyzing it with gdb, otherwise, since
> you can apparently
trivially reproduce the segfault, just attach gdb
> to
> any httpd
process (except maybe the one that has pid 1 as its parent)
> with
>
>
gdb $(which httpd)
>
> it will tell you that lots of debug symbols
are absent, and how to
> run
> debuginfo-install
> to install them. Do
that as instructed, re-run gdb, verify that no
> "symbols missing"
messages
> are printed on startup. Execute "cont" at the gdb prompt and
start
> causing segfaults again
> until gdb returns to the prompt. Do a
"bt full". Not sure if httpd-
> dev
> is the right place, it
> might be a
bug in CentOS and/or the ancient httpd they're using.
>
Thanks for your help and patience. I wasn't able to get the prompt back
so after a while I just C-c'd. Any comment?
This is what I get:
(gdb) cont
Continuing.
Detaching after fork from child process 13499.
Detaching after fork from child process 13500.
Detaching after fork from child process 13501.
Detaching after fork from child process 13502.
Detaching after fork from child process 13503.
^C
Program received signal SIGINT, Interrupt.
0x7f598fc773f3 in __select_nocancel () at ../sysdeps/unix/syscall-
template.S:81
81 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
(gdb) bt full
#0 0x7f598fc773f3 in __select_nocancel () at
../sysdeps/unix/syscall-template.S:81
No locals.
#1 0x7f599038f585 in apr_sleep (t=t@entry=100) at
time/unix/time.c:246
tv = {tv_sec = 0, tv_usec = 713807}
#2 0x7f59916b1dd1 in ap_wait_or_timeout (status=status@entry=0x7ff
dd22c85f8, exitcode=exitcode@entry=0x7ffdd22c85fc, ret=ret@entry=0x7ffd
d22c8600, p=, s=) at mpm_common.c:195
rv =
#3 0x7f5986e8a13e in prefork_run (_pconf=,
plog=, s=) at prefork.c:1016
status = 11
pid = {pid = -1, in = 0x7f599308ef58, out = 0x34a934a9, err
= 0x7f599300c340}
child_slot =
exitwhy = APR_PROC_SIGNAL
processed_status =
index =
remaining_children_to_start = 0
rv =
#4 0x7f59916b15be in ap_run_mpm (pconf=pconf@entry=0x7f5992fe3158,
plog=0x7f5993010378, s=0x7f599300c340) at mpm_common.c:96
pHook =
n = 0
rv = -1
#5 0x7f59916aab46 in main (argc=2, argv=0x7ffdd22c88f8) at
main.c:777
c = 68 'D'
showcompile = 0
showdirectives = 0
confname = 0x7f59916e68af "conf/httpd.conf"
def_server_root = 0x7f59916e68a4 "/etc/httpd"
temp_error_log = 0x0
error =
process = 0x7f5992fe1238
pconf = 0x7f5992fe3158
plog = 0x7f5993010378
ptemp = 0x7f599300e368
pcommands = 0x7f5993005268
opt = 0x7f5993005358
rv =
mod = 0x7f5991904098 <ap_prelinked_modules+24>
opt_arg = 0x7ffdd22c9f7d "FOREGROUND"
signal_server =
And the error log:
[Fri Nov 11 12:50:45.402984 2016] [mpm_prefork:notice] [pid 13481]
AH00163: Apache/2.4.6 (CentOS) mod_ftp/1.0.1-dev OpenSSL/1.0.1e-fips
mod_fcgid/2.3.9 configured -- resuming normal operations
[Fri Nov 11 12:50:45.403003 2016] [core:notice] [pid 13481] AH00094:
Command line: '/usr/sbin/httpd -D FOREGROUND'
[Fri Nov 11 12:50:45.427847 2016] [ftp:notice] [pid 13482] FTP low
numbered port daemon waiting for port requests
[Fri Nov 11 12:51:26.868223 2016] [core:notice] [pid 13481] AH00052:
child pid 13484 exit signal Segmentation fault (11)
[Fri Nov 11 12:51:56.902013 2016] [core:notice] [pid 13481] AH00052:
child pid 13485 exit signal Segmentation fault (11)
[Fri Nov 11 12:52:15.923595 2016] [core:notice] [pid 13481] AH00052:
child pid 13486 exit signal Segmentation fault (11)
[Fri Nov 11 12:52:22.932293 2016] [core:notice] [pid 13481] AH00052:
child pid 13487 exit signal Segmentation fault (11)
[Fri Nov 11 12:52:25.935810 2016] [core:notice] [pid 13481] AH00052:
child pid 13488 exit signal Segmentation fault (11)
Re: mod_ftp segaults on rheloids
On Fri, 2016-11-11 at 08:53 +, Nick Kew wrote: > On Fri, 2016-11-11 at 08:24 +0000, Benjamin Lefoul wrote: > > > > Is this list still active? > > Maybe it was not the right place to ask about mod_ftp? > > I guess noone picked up the baton. Too many blanks to fill. > > Did you build mod_ftp yourself on a distro-provided httpd? Yes. I did build myself from the latest svn. I installed: httpd-devel-2.4.6-40.sl7.4.x86_64 from Scientific Linux 7 httpd-devel-2.4.6-40.el7.centos.4.x86_64 on centOS7 (so, the same, essentially), as well as the "Development Tools" group. > What toolchain did you use for that? > What happens if you build everything yourself, I'd rather focus on trying to get it to work on the distro provided apache for this week (I already have some services neatly set there). (I'll append here if I can clear some time to try later this month.) > or alternatively use everything from the distro? > Where's the traceback from your segfault? > Can you help me with this? I guess I should run gdb and attach the correct process, but how do I set the debug flags? Thank you very much, Benjamin
Re: mod_ftp segaults on rheloids
Is this list still active? Maybe it was not the right place to ask about mod_ftp? Benjamin On Tue, 2016-11-08 at 09:36 +0100, Benjamin Lefoul wrote: > Hi, > > I have built mod_ftp on fresh RHELoids (tried on both CentOS7 and > Scientific Linux 7). > Whether I try the default conf or my own, the module always > immediately segfaults: > > [Tue Nov 08 08:15:52.798201 2016] [suexec:notice] [pid 1225] AH01232: > suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) > [Tue Nov 08 08:15:52.890162 2016] [auth_digest:notice] [pid 1225] > AH01757: generating secret for digest authentication ... > [Tue Nov 08 08:15:52.891402 2016] [lbmethod_heartbeat:notice] [pid > 1225] AH02282: No slotmem from mod_heartmonitor > [Tue Nov 08 08:15:52.898709 2016] [ftp:notice] [pid 1333] FTP low > numbered port daemon waiting for port requests > [Tue Nov 08 08:15:52.914261 2016] [mpm_prefork:notice] [pid 1225] > AH00163: Apache/2.4.6 (CentOS) mod_ftp/1.0.1-dev OpenSSL/1.0.1e-fips > mod_fcgid/2.3.9 configured -- resuming normal operations > [Tue Nov 08 08:15:52.914279 2016] [core:notice] [pid 1225] AH00094: > Command line: '/usr/sbin/httpd -D FOREGROUND' > [Tue Nov 08 08:25:02.543360 2016] [core:notice] [pid 1225] AH00052: > child pid 1337 exit signal Segmentation fault (11) > [Tue Nov 08 08:25:32.577127 2016] [core:notice] [pid 1225] AH00052: > child pid 1338 exit signal Segmentation fault (11) > [Tue Nov 08 08:25:40.586853 2016] [core:notice] [pid 1225] AH00052: > child pid 1339 exit signal Segmentation fault (11) > > Each of these segfaults is me typing "ls" in lftp. > I juste want to get the ftp feature running. I can provide more info > if you tell me how :) > > Thanks! > > Benjamin Lefoul > nWISE AB
mod_ftp segaults on rheloids
Hi, I have built mod_ftp on fresh RHELoids (tried on both CentOS7 and Scientific Linux 7). Whether I try the default conf or my own, the module always immediately segfaults: [Tue Nov 08 08:15:52.798201 2016] [suexec:notice] [pid 1225] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Tue Nov 08 08:15:52.890162 2016] [auth_digest:notice] [pid 1225] AH01757: generating secret for digest authentication ... [Tue Nov 08 08:15:52.891402 2016] [lbmethod_heartbeat:notice] [pid 1225] AH02282: No slotmem from mod_heartmonitor [Tue Nov 08 08:15:52.898709 2016] [ftp:notice] [pid 1333] FTP low numbered port daemon waiting for port requests [Tue Nov 08 08:15:52.914261 2016] [mpm_prefork:notice] [pid 1225] AH00163: Apache/2.4.6 (CentOS) mod_ftp/1.0.1-dev OpenSSL/1.0.1e-fips mod_fcgid/2.3.9 configured -- resuming normal operations [Tue Nov 08 08:15:52.914279 2016] [core:notice] [pid 1225] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND' [Tue Nov 08 08:25:02.543360 2016] [core:notice] [pid 1225] AH00052: child pid 1337 exit signal Segmentation fault (11) [Tue Nov 08 08:25:32.577127 2016] [core:notice] [pid 1225] AH00052: child pid 1338 exit signal Segmentation fault (11) [Tue Nov 08 08:25:40.586853 2016] [core:notice] [pid 1225] AH00052: child pid 1339 exit signal Segmentation fault (11) Each of these segfaults is me typing "ls" in lftp. I juste want to get the ftp feature running. I can provide more info if you tell me how :) Thanks! Benjamin Lefoul nWISE AB
