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apparmor: fix capability to not use the current task, during reporting

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Mediation is based off of the cred but auditing includes the current
task which may not be related to the actual request.

Signed-off-by: John Johansen <john.johansen@canonical.com>
This commit is contained in:
John Johansen 2013-10-08 05:37:18 -07:00
parent 50b719f811
commit dd0c6e86f6
6 changed files with 15 additions and 22 deletions
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15
security/apparmor/capability.c
View File

@ -53,8 +53,7 @@ static void audit_cb(struct audit_buffer *ab, void *va)
/**
* audit_caps - audit a capability
* @profile: profile confining task (NOT NULL)
* @task: task capability test was performed against (NOT NULL)
* @profile: profile being tested for confinement (NOT NULL)
* @cap: capability tested
* @error: error code returned by test
*
@ -63,8 +62,7 @@ static void audit_cb(struct audit_buffer *ab, void *va)
*
* Returns: 0 or sa->error on success, error code on failure
*/
static int audit_caps(struct aa_profile *profile, struct task_struct *task,
int cap, int error)
static int audit_caps(struct aa_profile *profile, int cap, int error)
{
struct audit_cache *ent;
int type = AUDIT_APPARMOR_AUTO;
@ -73,7 +71,6 @@ static int audit_caps(struct aa_profile *profile, struct task_struct *task,
sa.type = LSM_AUDIT_DATA_CAP;
sa.aad = &aad;
sa.u.cap = cap;
sa.aad->tsk = task;
sa.aad->op = OP_CAPABLE;
sa.aad->error = error;
@ -124,8 +121,7 @@ static int profile_capable(struct aa_profile *profile, int cap)
/**
* aa_capable - test permission to use capability
* @task: task doing capability test against (NOT NULL)
* @profile: profile confining @task (NOT NULL)
* @profile: profile being tested against (NOT NULL)
* @cap: capability to be tested
* @audit: whether an audit record should be generated
*
@ -133,8 +129,7 @@ static int profile_capable(struct aa_profile *profile, int cap)
*
* Returns: 0 on success, or else an error code.
*/
int aa_capable(struct task_struct *task, struct aa_profile *profile, int cap,
int audit)
int aa_capable(struct aa_profile *profile, int cap, int audit)
{
int error = profile_capable(profile, cap);
@ -144,5 +139,5 @@ int aa_capable(struct task_struct *task, struct aa_profile *profile, int cap,
return error;
}
return audit_caps(profile, task, cap, error);
return audit_caps(profile, cap, error);
}

2
security/apparmor/domain.c
View File

@ -75,7 +75,7 @@ static int may_change_ptraced_domain(struct task_struct *task,
if (!tracer || unconfined(tracerp))
goto out;
error = aa_may_ptrace(tracer, tracerp, to_profile, PTRACE_MODE_ATTACH);
error = aa_may_ptrace(tracerp, to_profile, PTRACE_MODE_ATTACH);
out:
rcu_read_unlock();

5
security/apparmor/include/capability.h
View File

@ -4,7 +4,7 @@
* This file contains AppArmor capability mediation definitions.
*
* Copyright (C) 1998-2008 Novell/SUSE
* Copyright 2009-2010 Canonical Ltd.
* Copyright 2009-2013 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
@ -38,8 +38,7 @@ struct aa_caps {
extern struct aa_fs_entry aa_fs_entry_caps[];
int aa_capable(struct task_struct *task, struct aa_profile *profile, int cap,
int audit);
int aa_capable(struct aa_profile *profile, int cap, int audit);
static inline void aa_free_cap_rules(struct aa_caps *caps)
{

4
security/apparmor/include/ipc.h
View File

@ -19,8 +19,8 @@
struct aa_profile;
int aa_may_ptrace(struct task_struct *tracer_task, struct aa_profile *tracer,
struct aa_profile *tracee, unsigned int mode);
int aa_may_ptrace(struct aa_profile *tracer, struct aa_profile *tracee,
unsigned int mode);
int aa_ptrace(struct task_struct *tracer, struct task_struct *tracee,
unsigned int mode);

9
security/apparmor/ipc.c
View File

@ -54,15 +54,14 @@ static int aa_audit_ptrace(struct aa_profile *profile,
/**
* aa_may_ptrace - test if tracer task can trace the tracee
* @tracer_task: task who will do the tracing (NOT NULL)
* @tracer: profile of the task doing the tracing (NOT NULL)
* @tracee: task to be traced
* @mode: whether PTRACE_MODE_READ || PTRACE_MODE_ATTACH
*
* Returns: %0 else error code if permission denied or error
*/
int aa_may_ptrace(struct task_struct *tracer_task, struct aa_profile *tracer,
struct aa_profile *tracee, unsigned int mode)
int aa_may_ptrace(struct aa_profile *tracer, struct aa_profile *tracee,
unsigned int mode)
{
/* TODO: currently only based on capability, not extended ptrace
* rules,
@ -72,7 +71,7 @@ int aa_may_ptrace(struct task_struct *tracer_task, struct aa_profile *tracer,
if (unconfined(tracer) || tracer == tracee)
return 0;
/* log this capability request */
return aa_capable(tracer_task, tracer, CAP_SYS_PTRACE, 1);
return aa_capable(tracer, CAP_SYS_PTRACE, 1);
}
/**
@ -101,7 +100,7 @@ int aa_ptrace(struct task_struct *tracer, struct task_struct *tracee,
if (!unconfined(tracer_p)) {
struct aa_profile *tracee_p = aa_get_task_profile(tracee);
error = aa_may_ptrace(tracer, tracer_p, tracee_p, mode);
error = aa_may_ptrace(tracer_p, tracee_p, mode);
error = aa_audit_ptrace(tracer_p, tracee_p, error);
aa_put_profile(tracee_p);

2
security/apparmor/lsm.c
View File

@ -145,7 +145,7 @@ static int apparmor_capable(const struct cred *cred, struct user_namespace *ns,
if (!error) {
profile = aa_cred_profile(cred);
if (!unconfined(profile))
error = aa_capable(current, profile, cap, audit);
error = aa_capable(profile, cap, audit);
}
return error;
}