tree 45bfd454d59ce611a103d6b63fff08a5cb5d2194
parent 84f09f46b4ee9e4e9b6381f8af31817516d2091b
author J. Bruce Fields <bfields@citi.umich.edu> 1237242860 -0400
committer J. Bruce Fields <bfields@citi.umich.edu> 1237316155 -0400

nfsd: nfsd should drop CAP_MKNOD for non-root

Since creating a device node is normally an operation requiring special
privilege, Igor Zhbanov points out that it is surprising (to say the
least) that a client can, for example, create a device node on a
filesystem exported with root_squash.

So, make sure CAP_MKNOD is among the capabilities dropped when an nfsd
thread handles a request from a non-root user.

Reported-by: Igor Zhbanov <izh1979@gmail.com>
Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>