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[dwmw2 <dwmw2@xxxxxxxxxxxxx>]

Public bug reported:

Chrome (and other things) crash when Kerberos fails to authenticate:
https://bugs.chromium.org/p/chromium/issues/detail?id=554905

This was fixed in MIT krb5 in January:
https://github.com/krb5/krb5/pull/385

Thread 22 "Chrome_IOThread" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffdd687700 (LWP 14851)]
spnego_gss_inquire_context (minor_status=0x7fffdd68573c, context_handle=0x0, src_name=0x7fffdd685670, targ_name=0x7fffdd685668, 
    lifetime_rec=0x7fffdd685738, mech_type=0x7fffdd685660, ctx_flags=0x7fffdd685734, locally_initiated=0x7fffdd685730, opened=0x7fffdd68572c)
    at ../../../../src/lib/gssapi/spnego/spnego_mech.c:2315
2315	../../../../src/lib/gssapi/spnego/spnego_mech.c: No such file or directory.
(gdb) bt
#0  spnego_gss_inquire_context (minor_status=0x7fffdd68573c, context_handle=0x0, src_name=0x7fffdd685670, targ_name=0x7fffdd685668, 
    lifetime_rec=0x7fffdd685738, mech_type=0x7fffdd685660, ctx_flags=0x7fffdd685734, locally_initiated=0x7fffdd685730, opened=0x7fffdd68572c)
    at ../../../../src/lib/gssapi/spnego/spnego_mech.c:2315
#1  0x00007fffef72be54 in gss_inquire_context (minor_status=0x7fffdd68573c, context_handle=<optimized out>, src_name=0x7fffdd685788, 
    targ_name=0x7fffdd685750, lifetime_rec=0x7fffdd685738, mech_type=0x7fffdd685780, ctx_flags=0x7fffdd685734, locally_initiated=0x7fffdd685730, 
    opened=0x7fffdd68572c) at ../../../../src/lib/gssapi/mechglue/g_inq_context.c:114

** Affects: krb5 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1648901

Title:
  SPNEGO crash on mechanism failure

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