Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 207 insertions, 0 deletions

diff --git a/security/tomoyo/memory.c b/security/tomoyo/memory.c
new file mode 100644
index 000000000..1b570bde7
--- /dev/null
+++ b/security/tomoyo/memory.c
@@ -0,0 +1,207 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/memory.c
+ *
+ * Copyright (C) 2005-2011  NTT DATA CORPORATION
+ */
+
+#include <linux/hash.h>
+#include <linux/slab.h>
+#include "common.h"
+
+/**
+ * tomoyo_warn_oom - Print out of memory warning message.
+ *
+ * @function: Function's name.
+ */
+void tomoyo_warn_oom(const char *function)
+{
+	/* Reduce error messages. */
+	static pid_t tomoyo_last_pid;
+	const pid_t pid = current->pid;
+
+	if (tomoyo_last_pid != pid) {
+		pr_warn("ERROR: Out of memory at %s.\n", function);
+		tomoyo_last_pid = pid;
+	}
+	if (!tomoyo_policy_loaded)
+		panic("MAC Initialization failed.\n");
+}
+
+/* Memoy currently used by policy/audit log/query. */
+unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
+/* Memory quota for "policy"/"audit log"/"query". */
+unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
+
+/**
+ * tomoyo_memory_ok - Check memory quota.
+ *
+ * @ptr: Pointer to allocated memory.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Returns true if @ptr is not NULL and quota not exceeded, false otherwise.
+ *
+ * Caller holds tomoyo_policy_lock mutex.
+ */
+bool tomoyo_memory_ok(void *ptr)
+{
+	if (ptr) {
+		const size_t s = ksize(ptr);
+
+		tomoyo_memory_used[TOMOYO_MEMORY_POLICY] += s;
+		if (!tomoyo_memory_quota[TOMOYO_MEMORY_POLICY] ||
+		    tomoyo_memory_used[TOMOYO_MEMORY_POLICY] <=
+		    tomoyo_memory_quota[TOMOYO_MEMORY_POLICY])
+			return true;
+		tomoyo_memory_used[TOMOYO_MEMORY_POLICY] -= s;
+	}
+	tomoyo_warn_oom(__func__);
+	return false;
+}
+
+/**
+ * tomoyo_commit_ok - Check memory quota.
+ *
+ * @data:   Data to copy from.
+ * @size:   Size in byte.
+ *
+ * Returns pointer to allocated memory on success, NULL otherwise.
+ * @data is zero-cleared on success.
+ *
+ * Caller holds tomoyo_policy_lock mutex.
+ */
+void *tomoyo_commit_ok(void *data, const unsigned int size)
+{
+	void *ptr = kzalloc(size, GFP_NOFS | __GFP_NOWARN);
+
+	if (tomoyo_memory_ok(ptr)) {
+		memmove(ptr, data, size);
+		memset(data, 0, size);
+		return ptr;
+	}
+	kfree(ptr);
+	return NULL;
+}
+
+/**
+ * tomoyo_get_group - Allocate memory for "struct tomoyo_path_group"/"struct tomoyo_number_group".
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ * @idx:   Index number.
+ *
+ * Returns pointer to "struct tomoyo_group" on success, NULL otherwise.
+ */
+struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
+				      const u8 idx)
+{
+	struct tomoyo_group e = { };
+	struct tomoyo_group *group = NULL;
+	struct list_head *list;
+	const char *group_name = tomoyo_read_token(param);
+	bool found = false;
+
+	if (!tomoyo_correct_word(group_name) || idx >= TOMOYO_MAX_GROUP)
+		return NULL;
+	e.group_name = tomoyo_get_name(group_name);
+	if (!e.group_name)
+		return NULL;
+	if (mutex_lock_interruptible(&tomoyo_policy_lock))
+		goto out;
+	list = &param->ns->group_list[idx];
+	list_for_each_entry(group, list, head.list) {
+		if (e.group_name != group->group_name ||
+		    atomic_read(&group->head.users) == TOMOYO_GC_IN_PROGRESS)
+			continue;
+		atomic_inc(&group->head.users);
+		found = true;
+		break;
+	}
+	if (!found) {
+		struct tomoyo_group *entry = tomoyo_commit_ok(&e, sizeof(e));
+
+		if (entry) {
+			INIT_LIST_HEAD(&entry->member_list);
+			atomic_set(&entry->head.users, 1);
+			list_add_tail_rcu(&entry->head.list, list);
+			group = entry;
+			found = true;
+		}
+	}
+	mutex_unlock(&tomoyo_policy_lock);
+out:
+	tomoyo_put_name(e.group_name);
+	return found ? group : NULL;
+}
+
+/*
+ * tomoyo_name_list is used for holding string data used by TOMOYO.
+ * Since same string data is likely used for multiple times (e.g.
+ * "/lib/libc-2.5.so"), TOMOYO shares string data in the form of
+ * "const struct tomoyo_path_info *".
+ */
+struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
+
+/**
+ * tomoyo_get_name - Allocate permanent memory for string data.
+ *
+ * @name: The string to store into the permernent memory.
+ *
+ * Returns pointer to "struct tomoyo_path_info" on success, NULL otherwise.
+ */
+const struct tomoyo_path_info *tomoyo_get_name(const char *name)
+{
+	struct tomoyo_name *ptr;
+	unsigned int hash;
+	int len;
+	struct list_head *head;
+
+	if (!name)
+		return NULL;
+	len = strlen(name) + 1;
+	hash = full_name_hash(NULL, (const unsigned char *) name, len - 1);
+	head = &tomoyo_name_list[hash_long(hash, TOMOYO_HASH_BITS)];
+	if (mutex_lock_interruptible(&tomoyo_policy_lock))
+		return NULL;
+	list_for_each_entry(ptr, head, head.list) {
+		if (hash != ptr->entry.hash || strcmp(name, ptr->entry.name) ||
+		    atomic_read(&ptr->head.users) == TOMOYO_GC_IN_PROGRESS)
+			continue;
+		atomic_inc(&ptr->head.users);
+		goto out;
+	}
+	ptr = kzalloc(sizeof(*ptr) + len, GFP_NOFS | __GFP_NOWARN);
+	if (tomoyo_memory_ok(ptr)) {
+		ptr->entry.name = ((char *) ptr) + sizeof(*ptr);
+		memmove((char *) ptr->entry.name, name, len);
+		atomic_set(&ptr->head.users, 1);
+		tomoyo_fill_path_info(&ptr->entry);
+		list_add_tail(&ptr->head.list, head);
+	} else {
+		kfree(ptr);
+		ptr = NULL;
+	}
+out:
+	mutex_unlock(&tomoyo_policy_lock);
+	return ptr ? &ptr->entry : NULL;
+}
+
+/* Initial namespace.*/
+struct tomoyo_policy_namespace tomoyo_kernel_namespace;
+
+/**
+ * tomoyo_mm_init - Initialize mm related code.
+ */
+void __init tomoyo_mm_init(void)
+{
+	int idx;
+
+	for (idx = 0; idx < TOMOYO_MAX_HASH; idx++)
+		INIT_LIST_HEAD(&tomoyo_name_list[idx]);
+	tomoyo_kernel_namespace.name = "<kernel>";
+	tomoyo_init_policy_namespace(&tomoyo_kernel_namespace);
+	tomoyo_kernel_domain.ns = &tomoyo_kernel_namespace;
+	INIT_LIST_HEAD(&tomoyo_kernel_domain.acl_info_list);
+	tomoyo_kernel_domain.domainname = tomoyo_get_name("<kernel>");
+	list_add_tail_rcu(&tomoyo_kernel_domain.list, &tomoyo_domain_list);
+}