imapfilter Segmentation fault

[j^]

imapfilter with config.lua trying to connect to tls imap server crashes:

Starting program: /usr/bin/imapfilter
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
__strcasecmp_l_avx () at ../sysdeps/x86_64/multiarch/strcmp-sse42.S:164
164 ../sysdeps/x86_64/multiarch/strcmp-sse42.S: No such file or directory.
(gdb) bt
#0 __strcasecmp_l_avx () at ../sysdeps/x86_64/multiarch/strcmp-sse42.S:164
#1 0x0000000000410431 in ?? ()
#2 0x0000000000408fe9 in ?? ()
#3 0x0000000000405972 in ?? ()
#4 0x00007ffff7bb08ed in luaD_precall (L=L@entry=0x65bd10, func=<optimized out>, func@entry=0x6c39e0,
    nresults=nresults@entry=2) at ldo.c:319
#5 0x00007ffff7bbc4ed in luaV_execute (L=L@entry=0x65bd10) at lvm.c:709
#6 0x00007ffff7bb0c2e in luaD_call (L=0x65bd10, func=<optimized out>, nResults=<optimized out>, allowyield=<optimized out>)
    at ldo.c:402
#7 0x00007ffff7bb026f in luaD_rawrunprotected (L=L@entry=0x65bd10, f=f@entry=0x7ffff7bab810 <f_call>,
    ud=ud@entry=0x7fffffffe430) at ldo.c:131
#8 0x00007ffff7bb0e71 in luaD_pcall (L=L@entry=0x65bd10, func=func@entry=0x7ffff7bab810 <f_call>, u=u@entry=0x7fffffffe430,
    old_top=32, ef=<optimized out>) at ldo.c:603
#9 0x00007ffff7bacd91 in lua_pcallk (L=0x65bd10, nargs=<optimized out>, nresults=-1, errfunc=<optimized out>,
    ctx=<optimized out>, k=<optimized out>) at lapi.c:949
#10 0x0000000000407318 in ?? ()
#11 0x000000000040623d in ?? ()
#12 0x00007ffff6ec8830 in __libc_start_main (main=0x405fff, argc=1, argv=0x7fffffffe578, init=<optimized out>,
    fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe568) at ../csu/libc-start.c:291
#13 0x0000000000403449 in ?? ()

[j^ (j)]

Upstream bug: https://github.com/lefcha/imapfilter/issues/131

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Nish Aravamudan (nacc)]

Fixed in 2.6.10, which is in Zesty and Artful.

[David Britton (dpb)]

I've tried to repro with a skeleton config.lua and cannot on an up to date xenial.

If someone has a config.lua that repros this, please attach to the bug with your password stripped and anything else personal that you would rather not show redacted. Thanks!

[David Britton (dpb)]

Also a dpkg -l attached to the bug would be helpful if you can repro on Xenial.

[Charly Bazaugour (cbazaugour)]

I am currently recreating this bug on Ubuntu Xenial with a minimal config file :

options.timeout = 120
options.namespace = false
options.subscribe = true
options.charset = 'UTF-8'

cbaz_laposte = IMAP
{
 server = 'imap.laposte.net',
 username = 'cbazaugour'
}

Placing print('a') before and after the IMAP call shows the segfault happens in the IMAP call :

~$ imapfilter -v
a
Enter password for <email address hidden>:
S (3): * OK IMAP4 ready
C (3): 1000 CAPABILITY
S (3): 1000 OK completed
C (3): 1001 STARTTLS
S (3): 1001 OK completed
Erreur de segmentation (core dumped)

After adding the ssl information in my IMAP parameter :

cbaz_laposte = IMAP
{
 server = 'imap.laposte.net',
 username = 'cbazaugour',
 ssl = 'ssl2'
}

the segfault does no longer happen :

~$ imapfilter -v
Enter password for <email address hidden>:
S (3): * OK IMAP4 ready
C (3): 1000 CAPABILITY
S (3): 1000 OK completed
C (3): 1001 LOGIN "cbazaugour" *
S (3): 1001 OK [CAPABILITY IMAP4rev1 ACL BINARY CATENATE CHILDREN CONDSTORE ENABLE ESEARCH ESORT I18NLEVEL=1 ID IDLE LIST-EXTENDED LIST-STATUS LITERAL+ LOGIN-REFERRALS MULTIAPPEND NAMESPACE QRESYNC QUOTA RIGHTS=ektx SASL-IR SEARCHRES SORT THREAD=ORDEREDSUBJECT UIDPLUS UNSELECT WITHIN XLIST] LOGIN completed
C (3): 1002 CAPABILITY
S (3): 1002 OK CAPABILITY completed
C (3): 1003 LOGOUT

I would like to give you more informations to allow you to test this, but this account is my main personnal account. I''' try creating a new account reproducing the segfault.