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2018-01-12apparmor: fix ptrace label match when matching stacked labelsJohn Johansen
Given a label with a profile stack of A//&B or A//&C ... A ptrace rule should be able to specify a generic trace pattern with a rule like ptrace trace A//&**, however this is failing because while the correct label match routine is called, it is being done post label decomposition so it is always being done against a profile instead of the stacked label. To fix this refactor the cross check to pass the full peer label in to the label_match. Fixes: 290f458a4f16 ("apparmor: allow ptrace checks to be finer grained than just capability") Cc: Stable <stable@vger.kernel.org> Reported-by: Matthew Garrett <mjg59@google.com> Tested-by: Matthew Garrett <mjg59@google.com> Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-10-26Revert "apparmor: add base infastructure for socket mediation"Linus Torvalds
This reverts commit 651e28c5537abb39076d3949fb7618536f1d242e. This caused a regression: "The specific problem is that dnsmasq refuses to start on openSUSE Leap 42.2. The specific cause is that and attempt to open a PF_LOCAL socket gets EACCES. This means that networking doesn't function on a system with a 4.14-rc2 system." Sadly, the developers involved seemed to be in denial for several weeks about this, delaying the revert. This has not been a good release for the security subsystem, and this area needs to change development practices. Reported-and-bisected-by: James Bottomley <James.Bottomley@hansenpartnership.com> Tracked-by: Thorsten Leemhuis <regressions@leemhuis.info> Cc: John Johansen <john.johansen@canonical.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Seth Arnold <seth.arnold@canonical.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-09-22apparmor: add base infastructure for socket mediationJohn Johansen
Provide a basic mediation of sockets. This is not a full net mediation but just whether a spcific family of socket can be used by an application, along with setting up some basic infrastructure for network mediation to follow. the user space rule hav the basic form of NETWORK RULE = [ QUALIFIERS ] 'network' [ DOMAIN ] [ TYPE | PROTOCOL ] DOMAIN = ( 'inet' | 'ax25' | 'ipx' | 'appletalk' | 'netrom' | 'bridge' | 'atmpvc' | 'x25' | 'inet6' | 'rose' | 'netbeui' | 'security' | 'key' | 'packet' | 'ash' | 'econet' | 'atmsvc' | 'sna' | 'irda' | 'pppox' | 'wanpipe' | 'bluetooth' | 'netlink' | 'unix' | 'rds' | 'llc' | 'can' | 'tipc' | 'iucv' | 'rxrpc' | 'isdn' | 'phonet' | 'ieee802154' | 'caif' | 'alg' | 'nfc' | 'vsock' | 'mpls' | 'ib' | 'kcm' ) ',' TYPE = ( 'stream' | 'dgram' | 'seqpacket' | 'rdm' | 'raw' | 'packet' ) PROTOCOL = ( 'tcp' | 'udp' | 'icmp' ) eg. network, network inet, Signed-off-by: John Johansen <john.johansen@canonical.com> Acked-by: Seth Arnold <seth.arnold@canonical.com>
2017-06-10apparmor: add cross check permission helper macrosJohn Johansen
The cross check permission helper macros will help simplify code that does cross task permission checks like ptrace. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10apparmor: switch from profiles to using labels on contextsJohn Johansen
Begin the actual switch to using domain labels by storing them on the context and converting the label to a singular profile where possible. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10apparmor: switch from file_perms to aa_permsJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10apparmor: add gerneric permissions struct and support fnsJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-09apparmor: rework perm mapping to a slightly broader setJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-08apparmor: move permissions into their own file to be more easily sharedJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>