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| author | John Johansen | 2017-06-09 23:22:14 +0200 |
|---|---|---|
| committer | John Johansen | 2017-06-11 02:11:41 +0200 |
| commit | b2d09ae449cedc6f276ac485c013d22a97d36992 (patch) | |
| tree | 3984bf515f092325a3baad20d50a3814daff9f5a /security/apparmor/lsm.c | |
| parent | apparmor: add cross check permission helper macros (diff) | |
| download | kernel-qcow2-linux-b2d09ae449cedc6f276ac485c013d22a97d36992.tar.gz kernel-qcow2-linux-b2d09ae449cedc6f276ac485c013d22a97d36992.tar.xz kernel-qcow2-linux-b2d09ae449cedc6f276ac485c013d22a97d36992.zip | |
apparmor: move ptrace checks to using labels
Signed-off-by: John Johansen <john.johansen@canonical.com>
Diffstat (limited to 'security/apparmor/lsm.c')
| -rw-r--r-- | security/apparmor/lsm.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c index c3e98f74268f..bf28b48bf6dd 100644 --- a/security/apparmor/lsm.c +++ b/security/apparmor/lsm.c @@ -104,12 +104,31 @@ static void apparmor_cred_transfer(struct cred *new, const struct cred *old) static int apparmor_ptrace_access_check(struct task_struct *child, unsigned int mode) { - return aa_ptrace(current, child, mode); + struct aa_label *tracer, *tracee; + int error; + + tracer = begin_current_label_crit_section(); + tracee = aa_get_task_label(child); + error = aa_may_ptrace(tracer, tracee, + mode == PTRACE_MODE_READ ? AA_PTRACE_READ : AA_PTRACE_TRACE); + aa_put_label(tracee); + end_current_label_crit_section(tracer); + + return error; } static int apparmor_ptrace_traceme(struct task_struct *parent) { - return aa_ptrace(parent, current, PTRACE_MODE_ATTACH); + struct aa_label *tracer, *tracee; + int error; + + tracee = begin_current_label_crit_section(); + tracer = aa_get_task_label(parent); + error = aa_may_ptrace(tracer, tracee, AA_PTRACE_TRACE); + aa_put_label(tracer); + end_current_label_crit_section(tracee); + + return error; } /* Derived from security/commoncap.c:cap_capget */ |