Re: Linux 4.18.9 update -> sendfax: 460 Failed to submit job 110: Unable to open scheduler FIFO

On 09/26/2018 06:44 PM, David C. Rankin wrote:
> All,
> 
>     On Archlinux, after recent updates (linux 4.18.9, hylafax 6.0.7),
> hylafax/sendfax fails with the error:
> 
> sendfax: 460 Failed to submit job 110: Unable to open scheduler FIFO: No such
> device or address.
> 
> it had been working find up until the last week or two. Reverting to the LTS
> kernel resolves the issue. There are no obvious errors in the journal.
> 
> (the error is reported by Avantfax)
> 
>   Does anyone know why sendfax would begin failing with "Unable to open
> scheduler FIFO: No such device or address." with the 4.18.9 kernel, but work
> fine on LTS (4.14.71)?
> 
>   The last successful outbound fax before this failure began was 9/19. Since
> that time the only relevant updates have been:
> 
>   linux (4.18.8.arch1-1 -> 4.18.9.arch1-1)
>   hylafax (6.0.6-8 -> 6.0.7-1)
> 
>   Since hylafax 6.0.7-1 works fine with LTS, that points to linux 4.18.9 being
> the problem.
> 
>   What would I check to determine why sendfax is unable to open scheduler FIFO
> (No such device or address) when running on linux 4.18.9? Permissions under
> /var/spool/hylafax are the same under both kernels:
> 
> 
>  # l /var/spool/hylafax/
> total 76
> drwxr-xr-x 17 uucp uucp 4096 Sep 25 22:16 .
> drwxr-xr-x 10 root root 4096 Dec 29  2013 ..
> drwx------  2 uucp uucp 4096 May 21  2013 archive
> drwxr-xr-x  2 uucp uucp 4096 Sep 25 22:16 bin
> drwxr-xr-x  2 uucp uucp 4096 Sep 26 15:49 client
> drwxr-xr-x  2 uucp uucp 4096 Sep 25 22:16 config
> drwxr-xr-x  2 uucp uucp 4096 Oct 23  2017 dev
> drwx------  2 uucp uucp 4096 Sep 26 15:49 docq
> drwx------  2 uucp uucp 4096 Sep 20 00:00 doneq
> drwxr-xr-x  3 uucp uucp 4096 Sep 26 00:00 etc
> drwxr-xr-x  2 uucp uucp 4096 Sep 19 15:12 info
> drwxr-xr-x  2 uucp uucp 4096 Sep 26 10:25 log
> drwx------  2 uucp uucp 4096 May 21  2013 pollq
> drwxr-xr-x  2 uucp uucp 4096 Sep 26 10:25 recvq
> drwx------  2 uucp uucp 4096 Sep 26 15:49 sendq
> drwxr-xr-x  2 uucp uucp 4096 Oct 23  2017 status
> drwx------  2 uucp uucp 4096 Sep 26 15:49 tmp
> -r--r--r--  1 root root 5426 Sep 25 07:29 COPYRIGHT
> prw-------  1 uucp uucp    0 Sep 25 07:29 FIFO
> prw-------  1 uucp uucp    0 Sep 20 19:57 FIFO.ttyS0
> 
>   The FIFO is there owned by uucp:uucp in both cases (as it has been for
> years). Did the latest kernel tighten some type of security that would effect
> mkfifo for hylafax in some way?
> 
> 

An example submission from the command line with kernel 4.18.9 results in the
following failure -- while rebooting the same machine to 4.14.71 sends just fine:

sendfax -vv -n -d 560xxxx /home/samba/scans/david_20180924_154926.pdf
Trying localhost [10] (::1) at port 4559...
Trying localhost [2] (127.0.0.1) at port 4559...
Connected to (null).
220 mydomain.com server (HylaFAX (tm) Version 6.0.7) ready.
-> USER david
230 User david logged in.
match against (..., 512)
rule: offset 0 string = "%!" -- failed (comparison)
rule: offset 0 short = 0x4d4d -- failed (comparison)
rule: offset 0 short = 0x4949 -- failed (comparison)
rule: offset 0 short = 0x1da -- failed (comparison)
rule: offset 0 short = 0x1f1e -- failed (comparison)
rule: offset 0 short = 0x1f9d -- failed (comparison)
rule: offset 0 short = 0x506 -- failed (comparison)
rule: offset 0 short = 0x5343 -- failed (comparison)
rule: offset 0 short = 0xf702 -- failed (comparison)
rule: offset 0 string = "GIF" -- failed (comparison)
rule: offset 0 long = 0x59a66a95 -- failed (comparison)
rule: offset 0 short = 0x1b45 -- failed (comparison)
rule: offset 0 short = 0x1b25 -- failed (comparison)
rule: offset 0 short = 0x1b26 -- failed (comparison)
rule: offset 0 short = 0x1b2a -- failed (comparison)
rule: offset 0 string = "%PDF" -- success (result pdf, rule "")
Apply DisplayNumber rules to "560xxxx"
--> return result "560xxxx"
-> FORM PDF
200 Format set to PDF.
-> TYPE I
200 Type set to Image.
SEND data, 44247 bytes
-> EPRT |1|127.0.0.1|38095|
200 EPRT command successful.
-> STOT
150 FILE: /tmp/doc124.pdf (Opening new data connection).
226 Transfer complete (FILE: /tmp/doc124.pdf).
-> JNEW
200 New job created: jobid: 130 groupid: 130.
-> JPARM FROMUSER "David C. Rankin"
213 FROMUSER set to "David C. Rankin".
-> JPARM LASTTIME 000259
213 LASTTIME set to 000259.
-> JPARM MAXDIALS 12
213 MAXDIALS set to 12.
-> JPARM MAXTRIES 3
213 MAXTRIES set to 3.
-> JPARM SCHEDPRI 127
213 SCHEDPRI set to 127.
-> JPARM DIALSTRING "560xxxx"
213 DIALSTRING set to "560xxxx".
-> JPARM NOTIFYADDR "[email protected]"
213 NOTIFYADDR set to "[email protected]".
-> JPARM VRES 98
213 VRES set to 98.
-> JPARM PAGEWIDTH 215
213 PAGEWIDTH set to 215.
-> JPARM PAGELENGTH 279
213 PAGELENGTH set to 279.
-> JPARM NOTIFY "none"
213 NOTIFY set to "none".
-> JPARM PAGECHOP "default"
213 PAGECHOP set to "default".
-> JPARM CHOPTHRESHOLD 3
213 CHOPTHRESHOLD set to 3.
-> JPARM DOCUMENT /tmp/doc124.pdf
200 Added document /tmp/doc124.pdf as docq/doc124.pdf.130.
-> JSUBM
460 Failed to submit job 130: Unable to open scheduler FIFO: No such device or
address.
460 Failed to submit job 130: Unable to open scheduler FIFO: No such device or
address.

Same command, same machine, just rebooted on 4.14.71 succeeds just fine.

Help? Mimms? Anybody?

I'm left scratching my head. What else to look at?

-- 
David C. Rankin, J.D.,P.E.


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