Oleg Nesterov 5c5f9cd2b5 userns: limit the maximum depth of user_namespace->parent chain ...

commit 8742f229b6 upstream.

Ensure that user_namespace->parent chain can't grow too much.
Currently we use the hardroded 32 as limit.

Reported-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2013-08-11 18:35:25 -07:00

23 KiB

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