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authorDarrick J. Wong <darrick.wong@oracle.com>2017-05-12 10:44:10 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2017-05-16 12:26:16 -0700
commitea9a46e1c49251331dbfda19ced7114337966178 (patch)
tree1b1f419d0d072a89b68c6af51a8e7cba9742eba1 /fs/affs
parent892d2a5f705723b2cb488bfb38bcbdcf83273184 (diff)
downloadblackbird-op-linux-ea9a46e1c49251331dbfda19ced7114337966178.tar.gz
blackbird-op-linux-ea9a46e1c49251331dbfda19ced7114337966178.zip
xfs: only return detailed fsmap info if the caller has CAP_SYS_ADMIN
There were a number of handwaving complaints that one could "possibly" use inode numbers and extent maps to fingerprint a filesystem hosting multiple containers and somehow use the information to guess at the contents of other containers and attack them. Despite the total lack of any demonstration that this is actually possible, it's easier to restrict access now and broaden it later, so use the rmapbt fsmap backends only if the caller has CAP_SYS_ADMIN. Unprivileged users will just have to make do with only getting the free space and static metadata placement information. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
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