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cd1dbf76b2
Add signal mediation where the signal can be mediated based on the
signal, direction, or the label or the peer/target. The signal perms
are verified on a cross check to ensure policy consistency in the case
of incremental policy load/replacement.
The optimization of skipping the cross check when policy is guaranteed
to be consistent (single compile unit) remains to be done.
policy rules have the form of
SIGNAL_RULE = [ QUALIFIERS ] 'signal' [ SIGNAL ACCESS PERMISSIONS ]
[ SIGNAL SET ] [ SIGNAL PEER ]
SIGNAL ACCESS PERMISSIONS = SIGNAL ACCESS | SIGNAL ACCESS LIST
SIGNAL ACCESS LIST = '(' Comma or space separated list of SIGNAL
ACCESS ')'
SIGNAL ACCESS = ( 'r' | 'w' | 'rw' | 'read' | 'write' | 'send' |
'receive' )
SIGNAL SET = 'set' '=' '(' SIGNAL LIST ')'
SIGNAL LIST = Comma or space separated list of SIGNALS
SIGNALS = ( 'hup' | 'int' | 'quit' | 'ill' | 'trap' | 'abrt' |
'bus' | 'fpe' | 'kill' | 'usr1' | 'segv' | 'usr2' |
'pipe' | 'alrm' | 'term' | 'stkflt' | 'chld' | 'cont' |
'stop' | 'stp' | 'ttin' | 'ttou' | 'urg' | 'xcpu' |
'xfsz' | 'vtalrm' | 'prof' | 'winch' | 'io' | 'pwr' |
'sys' | 'emt' | 'exists' | 'rtmin+0' ... 'rtmin+32'
)
SIGNAL PEER = 'peer' '=' AARE
eg.
signal, # allow all signals
signal send set=(hup, kill) peer=foo,
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/*
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* AppArmor security module
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*
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* This file contains AppArmor ipc mediation function definitions.
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*
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* Copyright (C) 1998-2008 Novell/SUSE
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* Copyright 2009-2017 Canonical Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2 of the
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* License.
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*/
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#ifndef __AA_IPC_H
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#define __AA_IPC_H
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#include <linux/sched.h>
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struct aa_profile;
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#define AA_PTRACE_TRACE MAY_WRITE
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#define AA_PTRACE_READ MAY_READ
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#define AA_MAY_BE_TRACED AA_MAY_APPEND
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#define AA_MAY_BE_READ AA_MAY_CREATE
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#define PTRACE_PERM_SHIFT 2
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#define AA_PTRACE_PERM_MASK (AA_PTRACE_READ | AA_PTRACE_TRACE | \
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AA_MAY_BE_READ | AA_MAY_BE_TRACED)
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#define AA_SIGNAL_PERM_MASK (MAY_READ | MAY_WRITE)
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#define AA_SFS_SIG_MASK "hup int quit ill trap abrt bus fpe kill usr1 " \
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"segv usr2 pipe alrm term stkflt chld cont stop stp ttin ttou urg " \
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"xcpu xfsz vtalrm prof winch io pwr sys emt lost"
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int aa_may_ptrace(struct aa_label *tracer, struct aa_label *tracee,
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u32 request);
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int aa_may_signal(struct aa_label *sender, struct aa_label *target, int sig);
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#endif /* __AA_IPC_H */
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