[Samba] Segfault when trying to generate keytab with samba 4.2.10

[Lars Maes]

Of course i can!

Hereby the backtrace with symbols:

Program received signal SIGSEGV, Segmentation fault.
free_PrincipalName (data=data at entry=0x45) at default/source4/heimdal/lib/asn1/asn1_krb5_asn1.c:961
961     default/source4/heimdal/lib/asn1/asn1_krb5_asn1.c: No such file or directory.
(gdb) bt
#0  free_PrincipalName (data=data at entry=0x45) at default/source4/heimdal/lib/asn1/asn1_krb5_asn1.c:961
#1  0x00007fffef9d4639 in free_Principal (data=data at entry=0x45) at default/source4/heimdal/lib/asn1/asn1_krb5_asn1.c:1123
#2  0x00007ffff7991fb1 in krb5_free_principal (context=context at entry=0x0, p=0x45) at ../source4/heimdal/lib/krb5/principal.c:84
#3  0x00007ffff79856c4 in krb5_kt_free_entry (context=0x0, entry=entry at entry=0x7fffffffdb70) at ../source4/heimdal/lib/krb5/keytab.c:709
#4  0x00007ffff3cc08e5 in smb_krb5_kt_free_entry (context=<optimized out>, kt_entry=kt_entry at entry=0x7fffffffdb70) at ../lib/krb5_wrap/krb5_samba.c:1247
#5  0x00007ffff6384c6d in ads_keytab_create_default (ads=<optimized out>) at ../source3/libads/kerberos_keytab.c:750
#6  0x0000555555596190 in net_ads_keytab_create (c=0x55555584e5b0, argc=<optimized out>, argv=<optimized out>) at ../source3/utils/net_ads.c:2507
#7  0x00005555555921d9 in net_ads_keytab (c=0x55555584e5b0, argc=1, argv=0x55555584ecd8) at ../source3/utils/net_ads.c:2576
#8  0x0000555555598ea4 in net_ads (c=<optimized out>, argc=<optimized out>, argv=<optimized out>) at ../source3/utils/net_ads.c:3329
#9  0x000055555557885a in main (argc=5, argv=0x7fffffffebb8) at ../source3/utils/net.c:961


> Hi All,
> 
> Whe tryin to use: net ads keytab create, I get the following segfault:
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007fffef9d3f69 in free_PrincipalName () from /usr/lib/x86_64-linux-gnu/samba/libasn1-samba4.so.8
> 
> I am using samba 4.2.10 from Debian.
> 
> Deb8u3 package
> 
> Anyone knows how to fix this?

Can you run this under gdb and get
a full backtrace please (with
symbols).