From 748e4f3d702def1a4bff191e0cf93b6a05340f01 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:41:34 +0000
Subject: [PATCH] add gpio led uart
---
kernel/security/apparmor/policy_unpack.c | 276 ++++++++++++++++++++++++++++++++++++++++++++++---------
1 files changed, 231 insertions(+), 45 deletions(-)
diff --git a/kernel/security/apparmor/policy_unpack.c b/kernel/security/apparmor/policy_unpack.c
index 612f737..10896d6 100644
--- a/kernel/security/apparmor/policy_unpack.c
+++ b/kernel/security/apparmor/policy_unpack.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* AppArmor security module
*
@@ -7,11 +8,6 @@
* Copyright (C) 1998-2008 Novell/SUSE
* Copyright 2009-2010 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
- * published by the Free Software Foundation, version 2 of the
- * License.
- *
* AppArmor uses a serialized binary format for loading policy. To find
* policy format documentation see Documentation/admin-guide/LSM/apparmor.rst
* All policy is validated before it is used.
@@ -20,6 +16,7 @@
#include <asm/unaligned.h>
#include <linux/ctype.h>
#include <linux/errno.h>
+#include <linux/zlib.h>
#include "include/apparmor.h"
#include "include/audit.h"
@@ -143,9 +140,11 @@
{
if (l->size != r->size)
return false;
+ if (l->compressed_size != r->compressed_size)
+ return false;
if (aa_g_hash_policy && memcmp(l->hash, r->hash, aa_hash_size()) != 0)
return false;
- return memcmp(l->data, r->data, r->size) == 0;
+ return memcmp(l->data, r->data, r->compressed_size ?: r->size) == 0;
}
/*
@@ -164,10 +163,10 @@
aa_put_ns(ns);
}
- kzfree(d->hash);
- kzfree(d->name);
+ kfree_sensitive(d->hash);
+ kfree_sensitive(d->name);
kvfree(d->data);
- kzfree(d);
+ kfree_sensitive(d);
}
void aa_loaddata_kref(struct kref *kref)
@@ -244,11 +243,11 @@
static bool unpack_X(struct aa_ext *e, enum aa_code code)
{
if (!inbounds(e, 1))
- return 0;
+ return false;
if (*(u8 *) e->pos != code)
- return 0;
+ return false;
e->pos++;
- return 1;
+ return true;
}
/**
@@ -262,10 +261,10 @@
* name element in the stream. If @name is NULL any name element will be
* skipped and only the typecode will be tested.
*
- * Returns 1 on success (both type code and name tests match) and the read
+ * Returns true on success (both type code and name tests match) and the read
* head is advanced past the headers
*
- * Returns: 0 if either match fails, the read head does not move
+ * Returns: false if either match fails, the read head does not move
*/
static bool unpack_nameX(struct aa_ext *e, enum aa_code code, const char *name)
{
@@ -290,11 +289,29 @@
/* now check if type code matches */
if (unpack_X(e, code))
- return 1;
+ return true;
fail:
e->pos = pos;
- return 0;
+ return false;
+}
+
+static bool unpack_u8(struct aa_ext *e, u8 *data, const char *name)
+{
+ void *pos = e->pos;
+
+ if (unpack_nameX(e, AA_U8, name)) {
+ if (!inbounds(e, sizeof(u8)))
+ goto fail;
+ if (data)
+ *data = get_unaligned((u8 *)e->pos);
+ e->pos += sizeof(u8);
+ return true;
+ }
+
+fail:
+ e->pos = pos;
+ return false;
}
static bool unpack_u32(struct aa_ext *e, u32 *data, const char *name)
@@ -307,12 +324,12 @@
if (data)
*data = le32_to_cpu(get_unaligned((__le32 *) e->pos));
e->pos += sizeof(u32);
- return 1;
+ return true;
}
fail:
e->pos = pos;
- return 0;
+ return false;
}
static bool unpack_u64(struct aa_ext *e, u64 *data, const char *name)
@@ -325,12 +342,12 @@
if (data)
*data = le64_to_cpu(get_unaligned((__le64 *) e->pos));
e->pos += sizeof(u64);
- return 1;
+ return true;
}
fail:
e->pos = pos;
- return 0;
+ return false;
}
static size_t unpack_array(struct aa_ext *e, const char *name)
@@ -455,7 +472,7 @@
* @e: serialized data extent information (NOT NULL)
* @profile: profile to add the accept table to (NOT NULL)
*
- * Returns: 1 if table successfully unpacked
+ * Returns: true if table successfully unpacked
*/
static bool unpack_trans_table(struct aa_ext *e, struct aa_profile *profile)
{
@@ -518,12 +535,12 @@
if (!unpack_nameX(e, AA_STRUCTEND, NULL))
goto fail;
}
- return 1;
+ return true;
fail:
aa_free_domain_entries(&profile->file.trans);
e->pos = saved_pos;
- return 0;
+ return false;
}
static bool unpack_xattrs(struct aa_ext *e, struct aa_profile *profile)
@@ -548,11 +565,55 @@
goto fail;
}
- return 1;
+ return true;
fail:
e->pos = pos;
- return 0;
+ return false;
+}
+
+static bool unpack_secmark(struct aa_ext *e, struct aa_profile *profile)
+{
+ void *pos = e->pos;
+ int i, size;
+
+ if (unpack_nameX(e, AA_STRUCT, "secmark")) {
+ size = unpack_array(e, NULL);
+
+ profile->secmark = kcalloc(size, sizeof(struct aa_secmark),
+ GFP_KERNEL);
+ if (!profile->secmark)
+ goto fail;
+
+ profile->secmark_count = size;
+
+ for (i = 0; i < size; i++) {
+ if (!unpack_u8(e, &profile->secmark[i].audit, NULL))
+ goto fail;
+ if (!unpack_u8(e, &profile->secmark[i].deny, NULL))
+ goto fail;
+ if (!unpack_strdup(e, &profile->secmark[i].label, NULL))
+ goto fail;
+ }
+ if (!unpack_nameX(e, AA_ARRAYEND, NULL))
+ goto fail;
+ if (!unpack_nameX(e, AA_STRUCTEND, NULL))
+ goto fail;
+ }
+
+ return true;
+
+fail:
+ if (profile->secmark) {
+ for (i = 0; i < size; i++)
+ kfree(profile->secmark[i].label);
+ kfree(profile->secmark);
+ profile->secmark_count = 0;
+ profile->secmark = NULL;
+ }
+
+ e->pos = pos;
+ return false;
}
static bool unpack_rlimits(struct aa_ext *e, struct aa_profile *profile)
@@ -582,11 +643,11 @@
if (!unpack_nameX(e, AA_STRUCTEND, NULL))
goto fail;
}
- return 1;
+ return true;
fail:
e->pos = pos;
- return 0;
+ return false;
}
static u32 strhash(const void *data, u32 len, u32 seed)
@@ -685,12 +746,18 @@
profile->label.flags |= FLAG_HAT;
if (!unpack_u32(e, &tmp, NULL))
goto fail;
- if (tmp == PACKED_MODE_COMPLAIN || (e->version & FORCE_COMPLAIN_FLAG))
+ if (tmp == PACKED_MODE_COMPLAIN || (e->version & FORCE_COMPLAIN_FLAG)) {
profile->mode = APPARMOR_COMPLAIN;
- else if (tmp == PACKED_MODE_KILL)
+ } else if (tmp == PACKED_MODE_ENFORCE) {
+ profile->mode = APPARMOR_ENFORCE;
+ } else if (tmp == PACKED_MODE_KILL) {
profile->mode = APPARMOR_KILL;
- else if (tmp == PACKED_MODE_UNCONFINED)
+ } else if (tmp == PACKED_MODE_UNCONFINED) {
profile->mode = APPARMOR_UNCONFINED;
+ profile->label.flags |= FLAG_UNCONFINED;
+ } else {
+ goto fail;
+ }
if (!unpack_u32(e, &tmp, NULL))
goto fail;
if (tmp)
@@ -750,6 +817,11 @@
if (!unpack_rlimits(e, profile)) {
info = "failed to unpack profile rlimits";
+ goto fail;
+ }
+
+ if (!unpack_secmark(e, profile)) {
+ info = "failed to unpack profile secmark rules";
goto fail;
}
@@ -824,7 +896,7 @@
while (unpack_strdup(e, &key, NULL)) {
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data) {
- kzfree(key);
+ kfree_sensitive(key);
goto fail;
}
@@ -832,13 +904,18 @@
data->size = unpack_blob(e, &data->data, NULL);
data->data = kvmemdup(data->data, data->size);
if (data->size && !data->data) {
- kzfree(data->key);
- kzfree(data);
+ kfree_sensitive(data->key);
+ kfree_sensitive(data);
goto fail;
}
- rhashtable_insert_fast(profile->data, &data->head,
- profile->data->p);
+ if (rhashtable_insert_fast(profile->data, &data->head,
+ profile->data->p)) {
+ kfree_sensitive(data->key);
+ kfree_sensitive(data);
+ info = "failed to insert data to table";
+ goto fail;
+ }
}
if (!unpack_nameX(e, AA_STRUCTEND, NULL)) {
@@ -892,7 +969,7 @@
* if not specified use previous version
* Mask off everything that is not kernel abi version
*/
- if (VERSION_LT(e->version, v5) || VERSION_GT(e->version, v7)) {
+ if (VERSION_LT(e->version, v5) || VERSION_GT(e->version, v8)) {
audit_iface(NULL, NULL, NULL, "unsupported interface version",
e, error);
return error;
@@ -905,11 +982,14 @@
e, error);
return error;
}
- if (*ns && strcmp(*ns, name))
+ if (*ns && strcmp(*ns, name)) {
audit_iface(NULL, NULL, NULL, "invalid ns change", e,
error);
- else if (!*ns)
- *ns = name;
+ } else if (!*ns) {
+ *ns = kstrdup(name, GFP_KERNEL);
+ if (!*ns)
+ return -ENOMEM;
+ }
}
return 0;
@@ -921,8 +1001,8 @@
xtype = xindex & AA_X_TYPE_MASK;
index = xindex & AA_X_INDEX_MASK;
if (xtype == AA_X_TABLE && index >= table_size)
- return 0;
- return 1;
+ return false;
+ return true;
}
/* verify dfa xindexes are in range of transition tables */
@@ -931,11 +1011,11 @@
int i;
for (i = 0; i < dfa->tables[YYTD_ID_ACCEPT]->td_lolen; i++) {
if (!verify_xindex(dfa_user_xindex(dfa, i), table_size))
- return 0;
+ return false;
if (!verify_xindex(dfa_other_xindex(dfa, i), table_size))
- return 0;
+ return false;
}
- return 1;
+ return true;
}
/**
@@ -964,7 +1044,7 @@
aa_put_profile(ent->old);
aa_put_profile(ent->new);
kfree(ent->ns_name);
- kzfree(ent);
+ kfree_sensitive(ent);
}
}
@@ -974,6 +1054,105 @@
if (ent)
INIT_LIST_HEAD(&ent->list);
return ent;
+}
+
+static int deflate_compress(const char *src, size_t slen, char **dst,
+ size_t *dlen)
+{
+ int error;
+ struct z_stream_s strm;
+ void *stgbuf, *dstbuf;
+ size_t stglen = deflateBound(slen);
+
+ memset(&strm, 0, sizeof(strm));
+
+ if (stglen < slen)
+ return -EFBIG;
+
+ strm.workspace = kvzalloc(zlib_deflate_workspacesize(MAX_WBITS,
+ MAX_MEM_LEVEL),
+ GFP_KERNEL);
+ if (!strm.workspace)
+ return -ENOMEM;
+
+ error = zlib_deflateInit(&strm, aa_g_rawdata_compression_level);
+ if (error != Z_OK) {
+ error = -ENOMEM;
+ goto fail_deflate_init;
+ }
+
+ stgbuf = kvzalloc(stglen, GFP_KERNEL);
+ if (!stgbuf) {
+ error = -ENOMEM;
+ goto fail_stg_alloc;
+ }
+
+ strm.next_in = src;
+ strm.avail_in = slen;
+ strm.next_out = stgbuf;
+ strm.avail_out = stglen;
+
+ error = zlib_deflate(&strm, Z_FINISH);
+ if (error != Z_STREAM_END) {
+ error = -EINVAL;
+ goto fail_deflate;
+ }
+ error = 0;
+
+ if (is_vmalloc_addr(stgbuf)) {
+ dstbuf = kvzalloc(strm.total_out, GFP_KERNEL);
+ if (dstbuf) {
+ memcpy(dstbuf, stgbuf, strm.total_out);
+ kvfree(stgbuf);
+ }
+ } else
+ /*
+ * If the staging buffer was kmalloc'd, then using krealloc is
+ * probably going to be faster. The destination buffer will
+ * always be smaller, so it's just shrunk, avoiding a memcpy
+ */
+ dstbuf = krealloc(stgbuf, strm.total_out, GFP_KERNEL);
+
+ if (!dstbuf) {
+ error = -ENOMEM;
+ goto fail_deflate;
+ }
+
+ *dst = dstbuf;
+ *dlen = strm.total_out;
+
+fail_stg_alloc:
+ zlib_deflateEnd(&strm);
+fail_deflate_init:
+ kvfree(strm.workspace);
+ return error;
+
+fail_deflate:
+ kvfree(stgbuf);
+ goto fail_stg_alloc;
+}
+
+static int compress_loaddata(struct aa_loaddata *data)
+{
+
+ AA_BUG(data->compressed_size > 0);
+
+ /*
+ * Shortcut the no compression case, else we increase the amount of
+ * storage required by a small amount
+ */
+ if (aa_g_rawdata_compression_level != 0) {
+ void *udata = data->data;
+ int error = deflate_compress(udata, data->size, &data->data,
+ &data->compressed_size);
+ if (error)
+ return error;
+
+ kvfree(udata);
+ } else
+ data->compressed_size = data->size;
+
+ return 0;
}
/**
@@ -1044,6 +1223,9 @@
goto fail;
}
}
+ error = compress_loaddata(udata);
+ if (error)
+ goto fail;
return 0;
fail_profile:
@@ -1057,3 +1239,7 @@
return error;
}
+
+#ifdef CONFIG_SECURITY_APPARMOR_KUNIT_TEST
+#include "policy_unpack_test.c"
+#endif /* CONFIG_SECURITY_APPARMOR_KUNIT_TEST */
--
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