[Pkg-shadow-devel] Bug#719890: login should fallback to /bin/sh if shell in /etc/passwd fails

[Justin Pryzby]

severity 719890 wishlist
thanks

That's probably a bad idea, since admins may specify nonextant *or
restricted* shells in order to disable a user.  Specifying a nonextant
shell may not be effective on its own (ssh can still forward ports,
etc); however, if a restricted shell is accidentally removed, or loses
its exec bit, or the partition has an error, or isn't mounted, a user
shouldn't be given additional privileges.