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authorEric W. Biederman <ebiederm@xmission.com>2010-07-12 18:50:25 -0700
committerEric W. Biederman <ebiederm@xmission.com>2012-11-19 05:59:11 -0800
commit5e1182deb81ae8c68494017c4a8a71811659c870 (patch)
tree81b9fa941a3293f6d5fa4e32aa311988bb3bf985 /kernel/exit.c
parent0a01f2cc390e10633a54f72c608cc3fe19a50c3d (diff)
pidns: Don't allow new processes in a dead pid namespace.
Set nr_hashed to -1 just before we schedule the work to cleanup proc. Test nr_hashed just before we hash a new pid and if nr_hashed is < 0 fail. This guaranteees that processes never enter a pid namespaces after we have cleaned up the state to support processes in a pid namespace. Currently sending SIGKILL to all of the process in a pid namespace as init exists gives us this guarantee but we need something a little stronger to support unsharing and joining a pid namespace. Acked-by: "Serge E. Hallyn" <serge@hallyn.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'kernel/exit.c')
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