David Howells 0c7774abb4 KEYS: Allow special keys (eg. DNS results) to be invalidated by CAP_SYS_ADMIN ... Special kernel keys, such as those used to hold DNS results for AFS, CIFS and NFS and those used to hold idmapper results for NFS, used to be 'invalidateable' with key_revoke(). However, since the default permissions for keys were reduced: Commit: 96b5c8fea6 KEYS: Reduce initial permissions on keys it has become impossible to do this. Add a key flag (KEY_FLAG_ROOT_CAN_INVAL) that will permit a key to be invalidated by root. This should not be used for system keyrings as the garbage collector will try and remove any invalidate key. For system keyrings, KEY_FLAG_ROOT_CAN_CLEAR can be used instead. After this, from userspace, keyctl_invalidate() and "keyctl invalidate" can be used by any possessor of CAP_SYS_ADMIN (typically root) to invalidate DNS and idmapper keys. Invalidated keys are immediately garbage collected and will be immediately rerequested if needed again. Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Steve Dickson <steved@redhat.com>		2014-07-17 20:45:08 +01:00
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dns_key.c	net/*: Fix FSF address in file headers	2013-12-06 12:37:57 -05:00
dns_query.c	KEYS: Allow special keys (eg. DNS results) to be invalidated by CAP_SYS_ADMIN	2014-07-17 20:45:08 +01:00
internal.h	net/*: Fix FSF address in file headers	2013-12-06 12:37:57 -05:00
Kconfig	[DNS RESOLVER] Minor typo correction	2010-08-06 03:18:09 +00:00
Makefile	Net: dns_resolver: Makefile: Remove deprecated kbuild goal definitions	2010-11-22 08:16:10 -08:00