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authorLinus Torvalds <torvalds@linux-foundation.org>2019-11-26 15:04:47 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-11-26 15:04:47 -0800
commit3f59dbcace56fae7e4ed303bab90f1bedadcfdf4 (patch)
treec425529202b9dbe3e3b3dde072c1edf51b1b9e93 /security
parentdf28204bb0f29cc475c0a8893c99b46a11a4903f (diff)
parentceb9e77324fa661b1001a0ae66f061b5fcb4e4e6 (diff)
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar: "The main kernel side changes in this cycle were: - Various Intel-PT updates and optimizations (Alexander Shishkin) - Prohibit kprobes on Xen/KVM emulate prefixes (Masami Hiramatsu) - Add support for LSM and SELinux checks to control access to the perf syscall (Joel Fernandes) - Misc other changes, optimizations, fixes and cleanups - see the shortlog for details. There were numerous tooling changes as well - 254 non-merge commits. Here are the main changes - too many to list in detail: - Enhancements to core tooling infrastructure, perf.data, libperf, libtraceevent, event parsing, vendor events, Intel PT, callchains, BPF support and instruction decoding. - There were updates to the following tools: perf annotate perf diff perf inject perf kvm perf list perf maps perf parse perf probe perf record perf report perf script perf stat perf test perf trace - And a lot of other changes: please see the shortlog and Git log for more details" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (279 commits) perf parse: Fix potential memory leak when handling tracepoint errors perf probe: Fix spelling mistake "addrees" -> "address" libtraceevent: Fix memory leakage in copy_filter_type libtraceevent: Fix header installation perf intel-bts: Does not support AUX area sampling perf intel-pt: Add support for decoding AUX area samples perf intel-pt: Add support for recording AUX area samples perf pmu: When using default config, record which bits of config were changed by the user perf auxtrace: Add support for queuing AUX area samples perf session: Add facility to peek at all events perf auxtrace: Add support for dumping AUX area samples perf inject: Cut AUX area samples perf record: Add aux-sample-size config term perf record: Add support for AUX area sampling perf auxtrace: Add support for AUX area sample recording perf auxtrace: Move perf_evsel__find_pmu() perf record: Add a function to test for kernel support for AUX area sampling perf tools: Add kernel AUX area sampling definitions perf/core: Make the mlock accounting simple again perf report: Jump to symbol source view from total cycles view ...
Diffstat (limited to 'security')
-rw-r--r--security/security.c27
-rw-r--r--security/selinux/hooks.c69
-rw-r--r--security/selinux/include/classmap.h2
-rw-r--r--security/selinux/include/objsec.h6
4 files changed, 103 insertions, 1 deletions
diff --git a/security/security.c b/security/security.c
index 1bc000f834e2..cd2d18d2d279 100644
--- a/security/security.c
+++ b/security/security.c
@@ -2404,3 +2404,30 @@ int security_locked_down(enum lockdown_reason what)
return call_int_hook(locked_down, 0, what);
}
EXPORT_SYMBOL(security_locked_down);
+
+#ifdef CONFIG_PERF_EVENTS
+int security_perf_event_open(struct perf_event_attr *attr, int type)
+{
+ return call_int_hook(perf_event_open, 0, attr, type);
+}
+
+int security_perf_event_alloc(struct perf_event *event)
+{
+ return call_int_hook(perf_event_alloc, 0, event);
+}
+
+void security_perf_event_free(struct perf_event *event)
+{
+ call_void_hook(perf_event_free, event);
+}
+
+int security_perf_event_read(struct perf_event *event)
+{
+ return call_int_hook(perf_event_read, 0, event);
+}
+
+int security_perf_event_write(struct perf_event *event)
+{
+ return call_int_hook(perf_event_write, 0, event);
+}
+#endif /* CONFIG_PERF_EVENTS */
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 9625b99e677f..28eb05490d59 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -6795,6 +6795,67 @@ struct lsm_blob_sizes selinux_blob_sizes __lsm_ro_after_init = {
.lbs_msg_msg = sizeof(struct msg_security_struct),
};
+#ifdef CONFIG_PERF_EVENTS
+static int selinux_perf_event_open(struct perf_event_attr *attr, int type)
+{
+ u32 requested, sid = current_sid();
+
+ if (type == PERF_SECURITY_OPEN)
+ requested = PERF_EVENT__OPEN;
+ else if (type == PERF_SECURITY_CPU)
+ requested = PERF_EVENT__CPU;
+ else if (type == PERF_SECURITY_KERNEL)
+ requested = PERF_EVENT__KERNEL;
+ else if (type == PERF_SECURITY_TRACEPOINT)
+ requested = PERF_EVENT__TRACEPOINT;
+ else
+ return -EINVAL;
+
+ return avc_has_perm(&selinux_state, sid, sid, SECCLASS_PERF_EVENT,
+ requested, NULL);
+}
+
+static int selinux_perf_event_alloc(struct perf_event *event)
+{
+ struct perf_event_security_struct *perfsec;
+
+ perfsec = kzalloc(sizeof(*perfsec), GFP_KERNEL);
+ if (!perfsec)
+ return -ENOMEM;
+
+ perfsec->sid = current_sid();
+ event->security = perfsec;
+
+ return 0;
+}
+
+static void selinux_perf_event_free(struct perf_event *event)
+{
+ struct perf_event_security_struct *perfsec = event->security;
+
+ event->security = NULL;
+ kfree(perfsec);
+}
+
+static int selinux_perf_event_read(struct perf_event *event)
+{
+ struct perf_event_security_struct *perfsec = event->security;
+ u32 sid = current_sid();
+
+ return avc_has_perm(&selinux_state, sid, perfsec->sid,
+ SECCLASS_PERF_EVENT, PERF_EVENT__READ, NULL);
+}
+
+static int selinux_perf_event_write(struct perf_event *event)
+{
+ struct perf_event_security_struct *perfsec = event->security;
+ u32 sid = current_sid();
+
+ return avc_has_perm(&selinux_state, sid, perfsec->sid,
+ SECCLASS_PERF_EVENT, PERF_EVENT__WRITE, NULL);
+}
+#endif
+
static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(binder_set_context_mgr, selinux_binder_set_context_mgr),
LSM_HOOK_INIT(binder_transaction, selinux_binder_transaction),
@@ -7030,6 +7091,14 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(bpf_map_free_security, selinux_bpf_map_free),
LSM_HOOK_INIT(bpf_prog_free_security, selinux_bpf_prog_free),
#endif
+
+#ifdef CONFIG_PERF_EVENTS
+ LSM_HOOK_INIT(perf_event_open, selinux_perf_event_open),
+ LSM_HOOK_INIT(perf_event_alloc, selinux_perf_event_alloc),
+ LSM_HOOK_INIT(perf_event_free, selinux_perf_event_free),
+ LSM_HOOK_INIT(perf_event_read, selinux_perf_event_read),
+ LSM_HOOK_INIT(perf_event_write, selinux_perf_event_write),
+#endif
};
static __init int selinux_init(void)
diff --git a/security/selinux/include/classmap.h b/security/selinux/include/classmap.h
index 32e9b03be3dd..7db24855e12d 100644
--- a/security/selinux/include/classmap.h
+++ b/security/selinux/include/classmap.h
@@ -244,6 +244,8 @@ struct security_class_mapping secclass_map[] = {
{"map_create", "map_read", "map_write", "prog_load", "prog_run"} },
{ "xdp_socket",
{ COMMON_SOCK_PERMS, NULL } },
+ { "perf_event",
+ {"open", "cpu", "kernel", "tracepoint", "read", "write"} },
{ NULL }
};
diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h
index 586b7abd0aa7..a4a86cbcfb0a 100644
--- a/security/selinux/include/objsec.h
+++ b/security/selinux/include/objsec.h
@@ -141,7 +141,11 @@ struct pkey_security_struct {
};
struct bpf_security_struct {
- u32 sid; /*SID of bpf obj creater*/
+ u32 sid; /* SID of bpf obj creator */
+};
+
+struct perf_event_security_struct {
+ u32 sid; /* SID of perf_event obj creator */
};
extern struct lsm_blob_sizes selinux_blob_sizes;