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authorEric W. Biederman <ebiederm@xmission.com>2013-03-25 20:07:01 -0700
committerEric W. Biederman <ebiederm@xmission.com>2013-08-28 21:35:14 -0700
commit7dc5dbc879bd0779924b5132a48b731a0bc04a1e (patch)
treebcae7323006aa19fc91c27fdb156667c9a061809 /kernel/pid.c
parente51db73532955dc5eaba4235e62b74b460709d5b (diff)
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sysfs: Restrict mounting sysfs
Don't allow mounting sysfs unless the caller has CAP_SYS_ADMIN rights over the net namespace. The principle here is if you create or have capabilities over it you can mount it, otherwise you get to live with what other people have mounted. Instead of testing this with a straight forward ns_capable call, perform this check the long and torturous way with kobject helpers, this keeps direct knowledge of namespaces out of sysfs, and preserves the existing sysfs abstractions. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
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