[SSSD] [PATCH] NSS: fix a use-after-free issue

[Sumit Bose]

Hi,

I found this accidentally because I was still running SSSD with
MALLOC_PERTURB_ set which I used some time ago to hunt a glibc issue.

This issue wasn't caught before by the unit-tests because
sss_cmd_done() which frees the context is overwritten in the tests and
so far didn't free the context. Additionally, since the use after free
was in a debug message, the unit tests must be run with debugging enable
to run over it. I think this is also the reason why Coverity or Clang
didn't found this issue before. Does anyone know if it is possible to
tell Converity to assume debug_level is set to 10?

bye,
Sumit