[Pkg-shadow-devel] fix in find_new_uid/gid()

[Peter Vrabec]

Hi all,

this is copy&paste from http://bugzilla.redhat.com/show_bug.cgi?id=693377
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Steps to Reproduce:
1. Edit login.defs to have UID_MAX >= 2147483647
   # sed -i 's/^UID_MAX.*$/UID_MAX                 2147483647/' login.defs
2. Add user
   # useradd test
   segfault

Actual results:
segfault

Expected results:
Error message or accept values of UID_MAX >= int
-------

I have changed alloca() to malloc() + return value check.

Regards,
Peter.
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