Merge tag 'char-misc-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here is the big char/misc driver patch pull request for 5.1-rc1.

  The largest thing by far is the new habanalabs driver for their AI
  accelerator chip. For now it is in the drivers/misc directory but will
  probably move to a new directory soon along with other drivers of this
  type.

  Other than that, just the usual set of individual driver updates and
  fixes. There's an "odd" merge in here from the DRM tree that they
  asked me to do as the MEI driver is starting to interact with the i915
  driver, and it needed some coordination. All of those patches have
  been properly acked by the relevant subsystem maintainers.

  All of these have been in linux-next with no reported issues, most for
  quite some time"

* tag 'char-misc-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (219 commits)
  habanalabs: adjust Kconfig to fix build errors
  habanalabs: use %px instead of %p in error print
  habanalabs: use do_div for 64-bit divisions
  intel_th: gth: Fix an off-by-one in output unassigning
  habanalabs: fix little-endian<->cpu conversion warnings
  habanalabs: use NULL to initialize array of pointers
  habanalabs: fix little-endian<->cpu conversion warnings
  habanalabs: soft-reset device if context-switch fails
  habanalabs: print pointer using %p
  habanalabs: fix memory leak with CBs with unaligned size
  habanalabs: return correct error code on MMU mapping failure
  habanalabs: add comments in uapi/misc/habanalabs.h
  habanalabs: extend QMAN0 job timeout
  habanalabs: set DMA0 completion to SOB 1007
  habanalabs: fix validation of WREG32 to DMA completion
  habanalabs: fix mmu cache registers init
  habanalabs: disable CPU access on timeouts
  habanalabs: add MMU DRAM default page mapping
  habanalabs: Dissociate RAZWI info from event types
  misc/habanalabs: adjust Kconfig to fix build errors
  ...

1 files changed, 371 insertions, 185 deletions

diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 4d2b2ad1ee0e..8685882da64c 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -329,6 +329,8 @@ struct binder_error {
  *                        (invariant after initialized)
  * @min_priority:         minimum scheduling priority
  *                        (invariant after initialized)
+ * @txn_security_ctx:     require sender's security context
+ *                        (invariant after initialized)
  * @async_todo:           list of async work items
  *                        (protected by @proc->inner_lock)
  *
@@ -365,6 +367,7 @@ struct binder_node {
 		 * invariant after initialization
 		 */
 		u8 accept_fds:1;
+		u8 txn_security_ctx:1;
 		u8 min_priority;
 	};
 	bool has_async_transaction;
@@ -615,6 +618,7 @@ struct binder_transaction {
 	long	saved_priority;
 	kuid_t	sender_euid;
 	struct list_head fd_fixups;
+	binder_uintptr_t security_ctx;
 	/**
 	 * @lock:  protects @from, @to_proc, and @to_thread
 	 *
@@ -625,6 +629,26 @@ struct binder_transaction {
 };
 
 /**
+ * struct binder_object - union of flat binder object types
+ * @hdr:   generic object header
+ * @fbo:   binder object (nodes and refs)
+ * @fdo:   file descriptor object
+ * @bbo:   binder buffer pointer
+ * @fdao:  file descriptor array
+ *
+ * Used for type-independent object copies
+ */
+struct binder_object {
+	union {
+		struct binder_object_header hdr;
+		struct flat_binder_object fbo;
+		struct binder_fd_object fdo;
+		struct binder_buffer_object bbo;
+		struct binder_fd_array_object fdao;
+	};
+};
+
+/**
  * binder_proc_lock() - Acquire outer lock for given binder_proc
  * @proc:         struct binder_proc to acquire
  *
@@ -1152,6 +1176,7 @@ static struct binder_node *binder_init_node_ilocked(
 	node->work.type = BINDER_WORK_NODE;
 	node->min_priority = flags & FLAT_BINDER_FLAG_PRIORITY_MASK;
 	node->accept_fds = !!(flags & FLAT_BINDER_FLAG_ACCEPTS_FDS);
+	node->txn_security_ctx = !!(flags & FLAT_BINDER_FLAG_TXN_SECURITY_CTX);
 	spin_lock_init(&node->lock);
 	INIT_LIST_HEAD(&node->work.entry);
 	INIT_LIST_HEAD(&node->async_todo);
@@ -2012,26 +2037,33 @@ static void binder_cleanup_transaction(struct binder_transaction *t,
 }
 
 /**
- * binder_validate_object() - checks for a valid metadata object in a buffer.
+ * binder_get_object() - gets object and checks for valid metadata
+ * @proc:	binder_proc owning the buffer
  * @buffer:	binder_buffer that we're parsing.
- * @offset:	offset in the buffer at which to validate an object.
+ * @offset:	offset in the @buffer at which to validate an object.
+ * @object:	struct binder_object to read into
  *
  * Return:	If there's a valid metadata object at @offset in @buffer, the
- *		size of that object. Otherwise, it returns zero.
+ *		size of that object. Otherwise, it returns zero. The object
+ *		is read into the struct binder_object pointed to by @object.
  */
-static size_t binder_validate_object(struct binder_buffer *buffer, u64 offset)
+static size_t binder_get_object(struct binder_proc *proc,
+				struct binder_buffer *buffer,
+				unsigned long offset,
+				struct binder_object *object)
 {
-	/* Check if we can read a header first */
+	size_t read_size;
 	struct binder_object_header *hdr;
 	size_t object_size = 0;
 
-	if (buffer->data_size < sizeof(*hdr) ||
-	    offset > buffer->data_size - sizeof(*hdr) ||
-	    !IS_ALIGNED(offset, sizeof(u32)))
+	read_size = min_t(size_t, sizeof(*object), buffer->data_size - offset);
+	if (read_size < sizeof(*hdr) || !IS_ALIGNED(offset, sizeof(u32)))
 		return 0;
+	binder_alloc_copy_from_buffer(&proc->alloc, object, buffer,
+				      offset, read_size);
 
-	/* Ok, now see if we can read a complete object. */
-	hdr = (struct binder_object_header *)(buffer->data + offset);
+	/* Ok, now see if we read a complete object. */
+	hdr = &object->hdr;
 	switch (hdr->type) {
 	case BINDER_TYPE_BINDER:
 	case BINDER_TYPE_WEAK_BINDER:
@@ -2060,10 +2092,13 @@ static size_t binder_validate_object(struct binder_buffer *buffer, u64 offset)
 
 /**
  * binder_validate_ptr() - validates binder_buffer_object in a binder_buffer.
+ * @proc:	binder_proc owning the buffer
  * @b:		binder_buffer containing the object
+ * @object:	struct binder_object to read into
  * @index:	index in offset array at which the binder_buffer_object is
  *		located
- * @start:	points to the start of the offset array
+ * @start_offset: points to the start of the offset array
+ * @object_offsetp: offset of @object read from @b
  * @num_valid:	the number of valid offsets in the offset array
  *
  * Return:	If @index is within the valid range of the offset array
@@ -2074,34 +2109,46 @@ static size_t binder_validate_object(struct binder_buffer *buffer, u64 offset)
  *		Note that the offset found in index @index itself is not
  *		verified; this function assumes that @num_valid elements
  *		from @start were previously verified to have valid offsets.
+ *		If @object_offsetp is non-NULL, then the offset within
+ *		@b is written to it.
  */
-static struct binder_buffer_object *binder_validate_ptr(struct binder_buffer *b,
-							binder_size_t index,
-							binder_size_t *start,
-							binder_size_t num_valid)
+static struct binder_buffer_object *binder_validate_ptr(
+						struct binder_proc *proc,
+						struct binder_buffer *b,
+						struct binder_object *object,
+						binder_size_t index,
+						binder_size_t start_offset,
+						binder_size_t *object_offsetp,
+						binder_size_t num_valid)
 {
-	struct binder_buffer_object *buffer_obj;
-	binder_size_t *offp;
+	size_t object_size;
+	binder_size_t object_offset;
+	unsigned long buffer_offset;
 
 	if (index >= num_valid)
 		return NULL;
 
-	offp = start + index;
-	buffer_obj = (struct binder_buffer_object *)(b->data + *offp);
-	if (buffer_obj->hdr.type != BINDER_TYPE_PTR)
+	buffer_offset = start_offset + sizeof(binder_size_t) * index;
+	binder_alloc_copy_from_buffer(&proc->alloc, &object_offset,
+				      b, buffer_offset, sizeof(object_offset));
+	object_size = binder_get_object(proc, b, object_offset, object);
+	if (!object_size || object->hdr.type != BINDER_TYPE_PTR)
 		return NULL;
+	if (object_offsetp)
+		*object_offsetp = object_offset;
 
-	return buffer_obj;
+	return &object->bbo;
 }
 
 /**
  * binder_validate_fixup() - validates pointer/fd fixups happen in order.
+ * @proc:		binder_proc owning the buffer
  * @b:			transaction buffer
- * @objects_start	start of objects buffer
- * @buffer:		binder_buffer_object in which to fix up
- * @offset:		start offset in @buffer to fix up
- * @last_obj:		last binder_buffer_object that we fixed up in
- * @last_min_offset:	minimum fixup offset in @last_obj
+ * @objects_start_offset: offset to start of objects buffer
+ * @buffer_obj_offset:	offset to binder_buffer_object in which to fix up
+ * @fixup_offset:	start offset in @buffer to fix up
+ * @last_obj_offset:	offset to last binder_buffer_object that we fixed
+ * @last_min_offset:	minimum fixup offset in object at @last_obj_offset
  *
  * Return:		%true if a fixup in buffer @buffer at offset @offset is
  *			allowed.
@@ -2132,28 +2179,41 @@ static struct binder_buffer_object *binder_validate_ptr(struct binder_buffer *b,
  *   C (parent = A, offset = 16)
  *     D (parent = B, offset = 0) // B is not A or any of A's parents
  */
-static bool binder_validate_fixup(struct binder_buffer *b,
-				  binder_size_t *objects_start,
-				  struct binder_buffer_object *buffer,
+static bool binder_validate_fixup(struct binder_proc *proc,
+				  struct binder_buffer *b,
+				  binder_size_t objects_start_offset,
+				  binder_size_t buffer_obj_offset,
 				  binder_size_t fixup_offset,
-				  struct binder_buffer_object *last_obj,
+				  binder_size_t last_obj_offset,
 				  binder_size_t last_min_offset)
 {
-	if (!last_obj) {
+	if (!last_obj_offset) {
 		/* Nothing to fix up in */
 		return false;
 	}
 
-	while (last_obj != buffer) {
+	while (last_obj_offset != buffer_obj_offset) {
+		unsigned long buffer_offset;
+		struct binder_object last_object;
+		struct binder_buffer_object *last_bbo;
+		size_t object_size = binder_get_object(proc, b, last_obj_offset,
+						       &last_object);
+		if (object_size != sizeof(*last_bbo))
+			return false;
+
+		last_bbo = &last_object.bbo;
 		/*
 		 * Safe to retrieve the parent of last_obj, since it
 		 * was already previously verified by the driver.
 		 */
-		if ((last_obj->flags & BINDER_BUFFER_FLAG_HAS_PARENT) == 0)
+		if ((last_bbo->flags & BINDER_BUFFER_FLAG_HAS_PARENT) == 0)
 			return false;
-		last_min_offset = last_obj->parent_offset + sizeof(uintptr_t);
-		last_obj = (struct binder_buffer_object *)
-			(b->data + *(objects_start + last_obj->parent));
+		last_min_offset = last_bbo->parent_offset + sizeof(uintptr_t);
+		buffer_offset = objects_start_offset +
+			sizeof(binder_size_t) * last_bbo->parent,
+		binder_alloc_copy_from_buffer(&proc->alloc, &last_obj_offset,
+					      b, buffer_offset,
+					      sizeof(last_obj_offset));
 	}
 	return (fixup_offset >= last_min_offset);
 }
@@ -2218,35 +2278,42 @@ static void binder_deferred_fd_close(int fd)
 
 static void binder_transaction_buffer_release(struct binder_proc *proc,
 					      struct binder_buffer *buffer,
-					      binder_size_t *failed_at)
+					      binder_size_t failed_at,
+					      bool is_failure)
 {
-	binder_size_t *offp, *off_start, *off_end;
 	int debug_id = buffer->debug_id;
+	binder_size_t off_start_offset, buffer_offset, off_end_offset;
 
 	binder_debug(BINDER_DEBUG_TRANSACTION,
-		     "%d buffer release %d, size %zd-%zd, failed at %pK\n",
+		     "%d buffer release %d, size %zd-%zd, failed at %llx\n",
 		     proc->pid, buffer->debug_id,
-		     buffer->data_size, buffer->offsets_size, failed_at);
+		     buffer->data_size, buffer->offsets_size,
+		     (unsigned long long)failed_at);
 
 	if (buffer->target_node)
 		binder_dec_node(buffer->target_node, 1, 0);
 
-	off_start = (binder_size_t *)(buffer->data +
-				      ALIGN(buffer->data_size, sizeof(void *)));
-	if (failed_at)
-		off_end = failed_at;
-	else
-		off_end = (void *)off_start + buffer->offsets_size;
-	for (offp = off_start; offp < off_end; offp++) {
+	off_start_offset = ALIGN(buffer->data_size, sizeof(void *));
+	off_end_offset = is_failure ? failed_at :
+				off_start_offset + buffer->offsets_size;
+	for (buffer_offset = off_start_offset; buffer_offset < off_end_offset;
+	     buffer_offset += sizeof(binder_size_t)) {
 		struct binder_object_header *hdr;
-		size_t object_size = binder_validate_object(buffer, *offp);
-
+		size_t object_size;
+		struct binder_object object;
+		binder_size_t object_offset;
+
+		binder_alloc_copy_from_buffer(&proc->alloc, &object_offset,
+					      buffer, buffer_offset,
+					      sizeof(object_offset));
+		object_size = binder_get_object(proc, buffer,
+						object_offset, &object);
 		if (object_size == 0) {
 			pr_err("transaction release %d bad object at offset %lld, size %zd\n",
-			       debug_id, (u64)*offp, buffer->data_size);
+			       debug_id, (u64)object_offset, buffer->data_size);
 			continue;
 		}
-		hdr = (struct binder_object_header *)(buffer->data + *offp);
+		hdr = &object.hdr;
 		switch (hdr->type) {
 		case BINDER_TYPE_BINDER:
 		case BINDER_TYPE_WEAK_BINDER: {
@@ -2309,10 +2376,11 @@ static void binder_transaction_buffer_release(struct binder_proc *proc,
 		case BINDER_TYPE_FDA: {
 			struct binder_fd_array_object *fda;
 			struct binder_buffer_object *parent;
-			uintptr_t parent_buffer;
-			u32 *fd_array;
+			struct binder_object ptr_object;
+			binder_size_t fda_offset;
 			size_t fd_index;
 			binder_size_t fd_buf_size;
+			binder_size_t num_valid;
 
 			if (proc->tsk != current->group_leader) {
 				/*
@@ -2323,23 +2391,19 @@ static void binder_transaction_buffer_release(struct binder_proc *proc,
 				continue;
 			}
 
+			num_valid = (buffer_offset - off_start_offset) /
+						sizeof(binder_size_t);
 			fda = to_binder_fd_array_object(hdr);
-			parent = binder_validate_ptr(buffer, fda->parent,
-						     off_start,
-						     offp - off_start);
+			parent = binder_validate_ptr(proc, buffer, &ptr_object,
+						     fda->parent,
+						     off_start_offset,
+						     NULL,
+						     num_valid);
 			if (!parent) {
 				pr_err("transaction release %d bad parent offset\n",
 				       debug_id);
 				continue;
 			}
-			/*
-			 * Since the parent was already fixed up, convert it
-			 * back to kernel address space to access it
-			 */
-			parent_buffer = parent->buffer -
-				binder_alloc_get_user_buffer_offset(
-						&proc->alloc);
-
 			fd_buf_size = sizeof(u32) * fda->num_fds;
 			if (fda->num_fds >= SIZE_MAX / sizeof(u32)) {
 				pr_err("transaction release %d invalid number of fds (%lld)\n",
@@ -2353,9 +2417,29 @@ static void binder_transaction_buffer_release(struct binder_proc *proc,
 				       debug_id, (u64)fda->num_fds);
 				continue;
 			}
-			fd_array = (u32 *)(parent_buffer + (uintptr_t)fda->parent_offset);
-			for (fd_index = 0; fd_index < fda->num_fds; fd_index++)
-				binder_deferred_fd_close(fd_array[fd_index]);
+			/*
+			 * the source data for binder_buffer_object is visible
+			 * to user-space and the @buffer element is the user
+			 * pointer to the buffer_object containing the fd_array.
+			 * Convert the address to an offset relative to
+			 * the base of the transaction buffer.
+			 */
+			fda_offset =
+			    (parent->buffer - (uintptr_t)buffer->user_data) +
+			    fda->parent_offset;
+			for (fd_index = 0; fd_index < fda->num_fds;
+			     fd_index++) {
+				u32 fd;
+				binder_size_t offset = fda_offset +
+					fd_index * sizeof(fd);
+
+				binder_alloc_copy_from_buffer(&proc->alloc,
+							      &fd,
+							      buffer,
+							      offset,
+							      sizeof(fd));
+				binder_deferred_fd_close(fd);
+			}
 		} break;
 		default:
 			pr_err("transaction release %d bad object type %x\n",
@@ -2491,7 +2575,7 @@ done:
 	return ret;
 }
 
-static int binder_translate_fd(u32 *fdp,
+static int binder_translate_fd(u32 fd, binder_size_t fd_offset,
 			       struct binder_transaction *t,
 			       struct binder_thread *thread,
 			       struct binder_transaction *in_reply_to)
@@ -2502,7 +2586,6 @@ static int binder_translate_fd(u32 *fdp,
 	struct file *file;
 	int ret = 0;
 	bool target_allows_fd;
-	int fd = *fdp;
 
 	if (in_reply_to)
 		target_allows_fd = !!(in_reply_to->flags & TF_ACCEPT_FDS);
@@ -2541,7 +2624,7 @@ static int binder_translate_fd(u32 *fdp,
 		goto err_alloc;
 	}
 	fixup->file = file;
-	fixup->offset = (uintptr_t)fdp - (uintptr_t)t->buffer->data;
+	fixup->offset = fd_offset;
 	trace_binder_transaction_fd_send(t, fd, fixup->offset);
 	list_add_tail(&fixup->fixup_entry, &t->fd_fixups);
 
@@ -2562,8 +2645,7 @@ static int binder_translate_fd_array(struct binder_fd_array_object *fda,
 				     struct binder_transaction *in_reply_to)
 {
 	binder_size_t fdi, fd_buf_size;
-	uintptr_t parent_buffer;
-	u32 *fd_array;
+	binder_size_t fda_offset;
 	struct binder_proc *proc = thread->proc;
 	struct binder_proc *target_proc = t->to_proc;
 
@@ -2581,20 +2663,29 @@ static int binder_translate_fd_array(struct binder_fd_array_object *fda,
 		return -EINVAL;
 	}
 	/*
-	 * Since the parent was already fixed up, convert it
-	 * back to the kernel address space to access it
+	 * the source data for binder_buffer_object is visible
+	 * to user-space and the @buffer element is the user
+	 * pointer to the buffer_object containing the fd_array.
+	 * Convert the address to an offset relative to
+	 * the base of the transaction buffer.
 	 */
-	parent_buffer = parent->buffer -
-		binder_alloc_get_user_buffer_offset(&target_proc->alloc);
-	fd_array = (u32 *)(parent_buffer + (uintptr_t)fda->parent_offset);
-	if (!IS_ALIGNED((unsigned long)fd_array, sizeof(u32))) {
+	fda_offset = (parent->buffer - (uintptr_t)t->buffer->user_data) +
+		fda->parent_offset;
+	if (!IS_ALIGNED((unsigned long)fda_offset, sizeof(u32))) {
 		binder_user_error("%d:%d parent offset not aligned correctly.\n",
 				  proc->pid, thread->pid);
 		return -EINVAL;
 	}
 	for (fdi = 0; fdi < fda->num_fds; fdi++) {
-		int ret = binder_translate_fd(&fd_array[fdi], t, thread,
-						in_reply_to);
+		u32 fd;
+		int ret;
+		binder_size_t offset = fda_offset + fdi * sizeof(fd);
+
+		binder_alloc_copy_from_buffer(&target_proc->alloc,
+					      &fd, t->buffer,
+					      offset, sizeof(fd));
+		ret = binder_translate_fd(fd, offset, t, thread,
+					  in_reply_to);
 		if (ret < 0)
 			return ret;
 	}
@@ -2604,30 +2695,34 @@ static int binder_translate_fd_array(struct binder_fd_array_object *fda,
 static int binder_fixup_parent(struct binder_transaction *t,
 			       struct binder_thread *thread,
 			       struct binder_buffer_object *bp,
-			       binder_size_t *off_start,
+			       binder_size_t off_start_offset,
 			       binder_size_t num_valid,
-			       struct binder_buffer_object *last_fixup_obj,
+			       binder_size_t last_fixup_obj_off,
 			       binder_size_t last_fixup_min_off)
 {
 	struct binder_buffer_object *parent;
-	u8 *parent_buffer;
 	struct binder_buffer *b = t->buffer;
 	struct binder_proc *proc = thread->proc;
 	struct binder_proc *target_proc = t->to_proc;
+	struct binder_object object;
+	binder_size_t buffer_offset;
+	binder_size_t parent_offset;
 
 	if (!(bp->flags & BINDER_BUFFER_FLAG_HAS_PARENT))
 		return 0;
 
-	parent = binder_validate_ptr(b, bp->parent, off_start, num_valid);
+	parent = binder_validate_ptr(target_proc, b, &object, bp->parent,
+				     off_start_offset, &parent_offset,
+				     num_valid);
 	if (!parent) {
 		binder_user_error("%d:%d got transaction with invalid parent offset or type\n",
 				  proc->pid, thread->pid);
 		return -EINVAL;
 	}
 
-	if (!binder_validate_fixup(b, off_start,
-				   parent, bp->parent_offset,
-				   last_fixup_obj,
+	if (!binder_validate_fixup(target_proc, b, off_start_offset,
+				   parent_offset, bp->parent_offset,
+				   last_fixup_obj_off,
 				   last_fixup_min_off)) {
 		binder_user_error("%d:%d got transaction with out-of-order buffer fixup\n",
 				  proc->pid, thread->pid);
@@ -2641,10 +2736,10 @@ static int binder_fixup_parent(struct binder_transaction *t,
 				  proc->pid, thread->pid);
 		return -EINVAL;
 	}
-	parent_buffer = (u8 *)((uintptr_t)parent->buffer -
-			binder_alloc_get_user_buffer_offset(
-				&target_proc->alloc));
-	*(binder_uintptr_t *)(parent_buffer + bp->parent_offset) = bp->buffer;
+	buffer_offset = bp->parent_offset +
+			(uintptr_t)parent->buffer - (uintptr_t)b->user_data;
+	binder_alloc_copy_to_buffer(&target_proc->alloc, b, buffer_offset,
+				    &bp->buffer, sizeof(bp->buffer));
 
 	return 0;
 }
@@ -2763,9 +2858,10 @@ static void binder_transaction(struct binder_proc *proc,
 	struct binder_transaction *t;
 	struct binder_work *w;
 	struct binder_work *tcomplete;
-	binder_size_t *offp, *off_end, *off_start;
+	binder_size_t buffer_offset = 0;
+	binder_size_t off_start_offset, off_end_offset;
 	binder_size_t off_min;
-	u8 *sg_bufp, *sg_buf_end;
+	binder_size_t sg_buf_offset, sg_buf_end_offset;
 	struct binder_proc *target_proc = NULL;
 	struct binder_thread *target_thread = NULL;
 	struct binder_node *target_node = NULL;
@@ -2774,10 +2870,12 @@ static void binder_transaction(struct binder_proc *proc,
 	uint32_t return_error = 0;
 	uint32_t return_error_param = 0;
 	uint32_t return_error_line = 0;
-	struct binder_buffer_object *last_fixup_obj = NULL;
+	binder_size_t last_fixup_obj_off = 0;
 	binder_size_t last_fixup_min_off = 0;
 	struct binder_context *context = proc->context;
 	int t_debug_id = atomic_inc_return(&binder_last_id);
+	char *secctx = NULL;
+	u32 secctx_sz = 0;
 
 	e = binder_transaction_log_add(&binder_transaction_log);
 	e->debug_id = t_debug_id;
@@ -3020,6 +3118,20 @@ static void binder_transaction(struct binder_proc *proc,
 	t->flags = tr->flags;
 	t->priority = task_nice(current);
 
+	if (target_node && target_node->txn_security_ctx) {
+		u32 secid;
+
+		security_task_getsecid(proc->tsk, &secid);
+		ret = security_secid_to_secctx(secid, &secctx, &secctx_sz);
+		if (ret) {
+			return_error = BR_FAILED_REPLY;
+			return_error_param = ret;
+			return_error_line = __LINE__;
+			goto err_get_secctx_failed;
+		}
+		extra_buffers_size += ALIGN(secctx_sz, sizeof(u64));
+	}
+
 	trace_binder_transaction(reply, t, target_node);
 
 	t->buffer = binder_alloc_new_buf(&target_proc->alloc, tr->data_size,
@@ -3036,16 +3148,30 @@ static void binder_transaction(struct binder_proc *proc,
 		t->buffer = NULL;
 		goto err_binder_alloc_buf_failed;
 	}
+	if (secctx) {
+		size_t buf_offset = ALIGN(tr->data_size, sizeof(void *)) +
+				    ALIGN(tr->offsets_size, sizeof(void *)) +
+				    ALIGN(extra_buffers_size, sizeof(void *)) -
+				    ALIGN(secctx_sz, sizeof(u64));
+
+		t->security_ctx = (uintptr_t)t->buffer->user_data + buf_offset;
+		binder_alloc_copy_to_buffer(&target_proc->alloc,
+					    t->buffer, buf_offset,
+					    secctx, secctx_sz);
+		security_release_secctx(secctx, secctx_sz);
+		secctx = NULL;
+	}
 	t->buffer->debug_id = t->debug_id;
 	t->buffer->transaction = t;
 	t->buffer->target_node = target_node;
 	trace_binder_transaction_alloc_buf(t->buffer);
-	off_start = (binder_size_t *)(t->buffer->data +
-				      ALIGN(tr->data_size, sizeof(void *)));
-	offp = off_start;
 
-	if (copy_from_user(t->buffer->data, (const void __user *)(uintptr_t)
-			   tr->data.ptr.buffer, tr->data_size)) {
+	if (binder_alloc_copy_user_to_buffer(
+				&target_proc->alloc,
+				t->buffer, 0,
+				(const void __user *)
+					(uintptr_t)tr->data.ptr.buffer,
+				tr->data_size)) {
 		binder_user_error("%d:%d got transaction with invalid data ptr\n",
 				proc->pid, thread->pid);
 		return_error = BR_FAILED_REPLY;
@@ -3053,8 +3179,13 @@ static void binder_transaction(struct binder_proc *proc,
 		return_error_line = __LINE__;
 		goto err_copy_data_failed;
 	}
-	if (copy_from_user(offp, (const void __user *)(uintptr_t)
-			   tr->data.ptr.offsets, tr->offsets_size)) {
+	if (binder_alloc_copy_user_to_buffer(
+				&target_proc->alloc,
+				t->buffer,
+				ALIGN(tr->data_size, sizeof(void *)),
+				(const void __user *)
+					(uintptr_t)tr->data.ptr.offsets,
+				tr->offsets_size)) {
 		binder_user_error("%d:%d got transaction with invalid offsets ptr\n",
 				proc->pid, thread->pid);
 		return_error = BR_FAILED_REPLY;
@@ -3079,17 +3210,30 @@ static void binder_transaction(struct binder_proc *proc,
 		return_error_line = __LINE__;
 		goto err_bad_offset;
 	}
-	off_end = (void *)off_start + tr->offsets_size;
-	sg_bufp = (u8 *)(PTR_ALIGN(off_end, sizeof(void *)));
-	sg_buf_end = sg_bufp + extra_buffers_size;
+	off_start_offset = ALIGN(tr->data_size, sizeof(void *));
+	buffer_offset = off_start_offset;
+	off_end_offset = off_start_offset + tr->offsets_size;
+	sg_buf_offset = ALIGN(off_end_offset, sizeof(void *));
+	sg_buf_end_offset = sg_buf_offset + extra_buffers_size;
 	off_min = 0;
-	for (; offp < off_end; offp++) {
+	for (buffer_offset = off_start_offset; buffer_offset < off_end_offset;
+	     buffer_offset += sizeof(binder_size_t)) {
 		struct binder_object_header *hdr;
-		size_t object_size = binder_validate_object(t->buffer, *offp);
-
-		if (object_size == 0 || *offp < off_min) {
+		size_t object_size;
+		struct binder_object object;
+		binder_size_t object_offset;
+
+		binder_alloc_copy_from_buffer(&target_proc->alloc,
+					      &object_offset,
+					      t->buffer,
+					      buffer_offset,
+					      sizeof(object_offset));
+		object_size = binder_get_object(target_proc, t->buffer,
+						object_offset, &object);
+		if (object_size == 0 || object_offset < off_min) {
 			binder_user_error("%d:%d got transaction with invalid offset (%lld, min %lld max %lld) or object.\n",
-					  proc->pid, thread->pid, (u64)*offp,
+					  proc->pid, thread->pid,
+					  (u64)object_offset,
 					  (u64)off_min,
 					  (u64)t->buffer->data_size);
 			return_error = BR_FAILED_REPLY;
@@ -3098,8 +3242,8 @@ static void binder_transaction(struct binder_proc *proc,
 			goto err_bad_offset;
 		}
 
-		hdr = (struct binder_object_header *)(t->buffer->data + *offp);
-		off_min = *offp + object_size;
+		hdr = &object.hdr;
+		off_min = object_offset + object_size;
 		switch (hdr->type) {
 		case BINDER_TYPE_BINDER:
 		case BINDER_TYPE_WEAK_BINDER: {
@@ -3113,6 +3257,9 @@ static void binder_transaction(struct binder_proc *proc,
 				return_error_line = __LINE__;
 				goto err_translate_failed;
 			}
+			binder_alloc_copy_to_buffer(&target_proc->alloc,
+						    t->buffer, object_offset,
+						    fp, sizeof(*fp));
 		} break;
 		case BINDER_TYPE_HANDLE:
 		case BINDER_TYPE_WEAK_HANDLE: {
@@ -3126,12 +3273,17 @@ static void binder_transaction(struct binder_proc *proc,
 				return_error_line = __LINE__;
 				goto err_translate_failed;
 			}
+			binder_alloc_copy_to_buffer(&target_proc->alloc,
+						    t->buffer, object_offset,
+						    fp, sizeof(*fp));
 		} break;
 
 		case BINDER_TYPE_FD: {
 			struct binder_fd_object *fp = to_binder_fd_object(hdr);
-			int ret = binder_translate_fd(&fp->fd, t, thread,
-						      in_reply_to);
+			binder_size_t fd_offset = object_offset +
+				(uintptr_t)&fp->fd - (uintptr_t)fp;
+			int ret = binder_translate_fd(fp->fd, fd_offset, t,
+						      thread, in_reply_to);
 
 			if (ret < 0) {
 				return_error = BR_FAILED_REPLY;
@@ -3140,14 +3292,23 @@ static void binder_transaction(struct binder_proc *proc,
 				goto err_translate_failed;
 			}
 			fp->pad_binder = 0;
+			binder_alloc_copy_to_buffer(&target_proc->alloc,
+						    t->buffer, object_offset,
+						    fp, sizeof(*fp));
 		} break;
 		case BINDER_TYPE_FDA: {
+			struct binder_object ptr_object;
+			binder_size_t parent_offset;
 			struct binder_fd_array_object *fda =
 				to_binder_fd_array_object(hdr);
+			size_t num_valid = (buffer_offset - off_start_offset) *
+						sizeof(binder_size_t);
 			struct binder_buffer_object *parent =
-				binder_validate_ptr(t->buffer, fda->parent,
-						    off_start,
-						    offp - off_start);
+				binder_validate_ptr(target_proc, t->buffer,
+						    &ptr_object, fda->parent,
+						    off_start_offset,
+						    &parent_offset,
+						    num_valid);
 			if (!parent) {
 				binder_user_error("%d:%d got transaction with invalid parent offset or type\n",
 						  proc->pid, thread->pid);
@@ -3156,9 +3317,11 @@ static void binder_transaction(struct binder_proc *proc,
 				return_error_line = __LINE__;
 				goto err_bad_parent;
 			}
-			if (!binder_validate_fixup(t->buffer, off_start,
-						   parent, fda->parent_offset,
-						   last_fixup_obj,
+			if (!binder_validate_fixup(target_proc, t->buffer,
+						   off_start_offset,
+						   parent_offset,
+						   fda->parent_offset,
+						   last_fixup_obj_off,
 						   last_fixup_min_off)) {
 				binder_user_error("%d:%d got transaction with out-of-order buffer fixup\n",
 						  proc->pid, thread->pid);
@@ -3175,14 +3338,15 @@ static void binder_transaction(struct binder_proc *proc,
 				return_error_line = __LINE__;
 				goto err_translate_failed;
 			}
-			last_fixup_obj = parent;
+			last_fixup_obj_off = parent_offset;
 			last_fixup_min_off =
 				fda->parent_offset + sizeof(u32) * fda->num_fds;
 		} break;
 		case BINDER_TYPE_PTR: {
 			struct binder_buffer_object *bp =
 				to_binder_buffer_object(hdr);
-			size_t buf_left = sg_buf_end - sg_bufp;
+			size_t buf_left = sg_buf_end_offset - sg_buf_offset;
+			size_t num_valid;
 
 			if (bp->length > buf_left) {
 				binder_user_error("%d:%d got transaction with too large buffer\n",
@@ -3192,9 +3356,13 @@ static void binder_transaction(struct binder_proc *proc,
 				return_error_line = __LINE__;
 				goto err_bad_offset;
 			}
-			if (copy_from_user(sg_bufp,
-					   (const void __user *)(uintptr_t)
-					   bp->buffer, bp->length)) {
+			if (binder_alloc_copy_user_to_buffer(
+						&target_proc->alloc,
+						t->buffer,
+						sg_buf_offset,
+						(const void __user *)
+							(uintptr_t)bp->buffer,
+						bp->length)) {
 				binder_user_error("%d:%d got transaction with invalid offsets ptr\n",
 						  proc->pid, thread->pid);
 				return_error_param = -EFAULT;
@@ -3203,14 +3371,16 @@ static void binder_transaction(struct binder_proc *proc,
 				goto err_copy_data_failed;
 			}
 			/* Fixup buffer pointer to target proc address space */
-			bp->buffer = (uintptr_t)sg_bufp +
-				binder_alloc_get_user_buffer_offset(
-						&target_proc->alloc);
-			sg_bufp += ALIGN(bp->length, sizeof(u64));
-
-			ret = binder_fixup_parent(t, thread, bp, off_start,
-						  offp - off_start,
-						  last_fixup_obj,
+			bp->buffer = (uintptr_t)
+				t->buffer->user_data + sg_buf_offset;
+			sg_buf_offset += ALIGN(bp->length, sizeof(u64));
+
+			num_valid = (buffer_offset - off_start_offset) *
+					sizeof(binder_size_t);
+			ret = binder_fixup_parent(t, thread, bp,
+						  off_start_offset,
+						  num_valid,
+						  last_fixup_obj_off,
 						  last_fixup_min_off);
 			if (ret < 0) {
 				return_error = BR_FAILED_REPLY;
@@ -3218,7 +3388,10 @@ static void binder_transaction(struct binder_proc *proc,
 				return_error_line = __LINE__;
 				goto err_translate_failed;
 			}
-			last_fixup_obj = bp;
+			binder_alloc_copy_to_buffer(&target_proc->alloc,
+						    t->buffer, object_offset,
+						    bp, sizeof(*bp));
+			last_fixup_obj_off = object_offset;
 			last_fixup_min_off = 0;
 		} break;
 		default:
@@ -3298,13 +3471,17 @@ err_bad_parent:
 err_copy_data_failed:
 	binder_free_txn_fixups(t);
 	trace_binder_transaction_failed_buffer_release(t->buffer);
-	binder_transaction_buffer_release(target_proc, t->buffer, offp);
+	binder_transaction_buffer_release(target_proc, t->buffer,
+					  buffer_offset, true);
 	if (target_node)
 		binder_dec_node_tmpref(target_node);
 	target_node = NULL;
 	t->buffer->transaction = NULL;
 	binder_alloc_free_buf(&target_proc->alloc, t->buffer);
 err_binder_alloc_buf_failed:
+	if (secctx)
+		security_release_secctx(secctx, secctx_sz);
+err_get_secctx_failed:
 	kfree(tcomplete);
 	binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
 err_alloc_tcomplete_failed:
@@ -3396,7 +3573,7 @@ binder_free_buf(struct binder_proc *proc, struct binder_buffer *buffer)
 		binder_node_inner_unlock(buf_node);
 	}
 	trace_binder_transaction_buffer_release(buffer);
-	binder_transaction_buffer_release(proc, buffer, NULL);
+	binder_transaction_buffer_release(proc, buffer, 0, false);
 	binder_alloc_free_buf(&proc->alloc, buffer);
 }
 
@@ -3915,6 +4092,7 @@ static int binder_wait_for_work(struct binder_thread *thread,
 
 /**
  * binder_apply_fd_fixups() - finish fd translation
+ * @proc:         binder_proc associated @t->buffer
  * @t:	binder transaction with list of fd fixups
  *
  * Now that we are in the context of the transaction target
@@ -3926,14 +4104,14 @@ static int binder_wait_for_work(struct binder_thread *thread,
  * fput'ing files that have not been processed and ksys_close'ing
  * any fds that have already been allocated.
  */
-static int binder_apply_fd_fixups(struct binder_transaction *t)
+static int binder_apply_fd_fixups(struct binder_proc *proc,
+				  struct binder_transaction *t)
 {
 	struct binder_txn_fd_fixup *fixup, *tmp;
 	int ret = 0;
 
 	list_for_each_entry(fixup, &t->fd_fixups, fixup_entry) {
 		int fd = get_unused_fd_flags(O_CLOEXEC);
-		u32 *fdp;
 
 		if (fd < 0) {
 			binder_debug(BINDER_DEBUG_TRANSACTION,
@@ -3948,33 +4126,20 @@ static int binder_apply_fd_fixups(struct binder_transaction *t)
 		trace_binder_transaction_fd_recv(t, fd, fixup->offset);
 		fd_install(fd, fixup->file);
 		fixup->file = NULL;
-		fdp = (u32 *)(t->buffer->data + fixup->offset);
-		/*
-		 * This store can cause problems for CPUs with a
-		 * VIVT cache (eg ARMv5) since the cache cannot
-		 * detect virtual aliases to the same physical cacheline.
-		 * To support VIVT, this address and the user-space VA
-		 * would both need to be flushed. Since this kernel
-		 * VA is not constructed via page_to_virt(), we can't
-		 * use flush_dcache_page() on it, so we'd have to use
-		 * an internal function. If devices with VIVT ever
-		 * need to run Android, we'll either need to go back
-		 * to patching the translated fd from the sender side
-		 * (using the non-standard kernel functions), or rework
-		 * how the kernel uses the buffer to use page_to_virt()
-		 * addresses instead of allocating in our own vm area.
-		 *
-		 * For now, we disable compilation if CONFIG_CPU_CACHE_VIVT.
-		 */
-		*fdp = fd;
+		binder_alloc_copy_to_buffer(&proc->alloc, t->buffer,
+					    fixup->offset, &fd,
+					    sizeof(u32));
 	}
 	list_for_each_entry_safe(fixup, tmp, &t->fd_fixups, fixup_entry) {
 		if (fixup->file) {
 			fput(fixup->file);
 		} else if (ret) {
-			u32 *fdp = (u32 *)(t->buffer->data + fixup->offset);
+			u32 fd;
 
-			binder_deferred_fd_close(*fdp);
+			binder_alloc_copy_from_buffer(&proc->alloc, &fd,
+						      t->buffer, fixup->offset,
+						      sizeof(fd));
+			binder_deferred_fd_close(fd);
 		}
 		list_del(&fixup->fixup_entry);
 		kfree(fixup);
@@ -4036,11 +4201,13 @@ retry:
 
 	while (1) {
 		uint32_t cmd;
-		struct binder_transaction_data tr;
+		struct binder_transaction_data_secctx tr;
+		struct binder_transaction_data *trd = &tr.transaction_data;
 		struct binder_work *w = NULL;
 		struct list_head *list = NULL;
 		struct binder_transaction *t = NULL;
 		struct binder_thread *t_from;
+		size_t trsize = sizeof(*trd);
 
 		binder_inner_proc_lock(proc);
 		if (!binder_worklist_empty_ilocked(&thread->todo))
@@ -4240,8 +4407,8 @@ retry:
 		if (t->buffer->target_node) {
 			struct binder_node *target_node = t->buffer->target_node;
 
-			tr.target.ptr = target_node->ptr;
-			tr.cookie =  target_node->cookie;
+			trd->target.ptr = target_node->ptr;
+			trd->cookie =  target_node->cookie;
 			t->saved_priority = task_nice(current);
 			if (t->priority < target_node->min_priority &&
 			    !(t->flags & TF_ONE_WAY))
@@ -4251,25 +4418,26 @@ retry:
 				binder_set_nice(target_node->min_priority);
 			cmd = BR_TRANSACTION;
 		} else {
-			tr.target.ptr = 0;
-			tr.cookie = 0;
+			trd->target.ptr = 0;
+			trd->cookie = 0;
 			cmd = BR_REPLY;
 		}
-		tr.code = t->code;
-		tr.flags = t->flags;
-		tr.sender_euid = from_kuid(current_user_ns(), t->sender_euid);
+		trd->code = t->code;
+		trd->flags = t->flags;
+		trd->sender_euid = from_kuid(current_user_ns(), t->sender_euid);
 
 		t_from = binder_get_txn_from(t);
 		if (t_from) {
 			struct task_struct *sender = t_from->proc->tsk;
 
-			tr.sender_pid = task_tgid_nr_ns(sender,
-							task_active_pid_ns(current));
+			trd->sender_pid =
+				task_tgid_nr_ns(sender,
+						task_active_pid_ns(current));
 		} else {
-			tr.sender_pid = 0;
+			trd->sender_pid = 0;
 		}
 
-		ret = binder_apply_fd_fixups(t);
+		ret = binder_apply_fd_fixups(proc, t);
 		if (ret) {
 			struct binder_buffer *buffer = t->buffer;
 			bool oneway = !!(t->flags & TF_ONE_WAY);
@@ -4297,15 +4465,18 @@ retry:
 			}
 			continue;
 		}
-		tr.data_size = t->buffer->data_size;
-		tr.offsets_size = t->buffer->offsets_size;
-		tr.data.ptr.buffer = (binder_uintptr_t)
-			((uintptr_t)t->buffer->data +
-			binder_alloc_get_user_buffer_offset(&proc->alloc));
-		tr.data.ptr.offsets = tr.data.ptr.buffer +
+		trd->data_size = t->buffer->data_size;
+		trd->offsets_size = t->buffer->offsets_size;
+		trd->data.ptr.buffer = (uintptr_t)t->buffer->user_data;
+		trd->data.ptr.offsets = trd->data.ptr.buffer +
 					ALIGN(t->buffer->data_size,
 					    sizeof(void *));
 
+		tr.secctx = t->security_ctx;
+		if (t->security_ctx) {
+			cmd = BR_TRANSACTION_SEC_CTX;
+			trsize = sizeof(tr);
+		}
 		if (put_user(cmd, (uint32_t __user *)ptr)) {
 			if (t_from)
 				binder_thread_dec_tmpref(t_from);
@@ -4316,7 +4487,7 @@ retry:
 			return -EFAULT;
 		}
 		ptr += sizeof(uint32_t);
-		if (copy_to_user(ptr, &tr, sizeof(tr))) {
+		if (copy_to_user(ptr, &tr, trsize)) {
 			if (t_from)
 				binder_thread_dec_tmpref(t_from);
 
@@ -4325,7 +4496,7 @@ retry:
 
 			return -EFAULT;
 		}
-		ptr += sizeof(tr);
+		ptr += trsize;
 
 		trace_binder_transaction_received(t);
 		binder_stat_br(proc, thread, cmd);
@@ -4333,16 +4504,18 @@ retry:
 			     "%d:%d %s %d %d:%d, cmd %d size %zd-%zd ptr %016llx-%016llx\n",
 			     proc->pid, thread->pid,
 			     (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" :
-			     "BR_REPLY",
+				(cmd == BR_TRANSACTION_SEC_CTX) ?
+				     "BR_TRANSACTION_SEC_CTX" : "BR_REPLY",
 			     t->debug_id, t_from ? t_from->proc->pid : 0,
 			     t_from ? t_from->pid : 0, cmd,
 			     t->buffer->data_size, t->buffer->offsets_size,
-			     (u64)tr.data.ptr.buffer, (u64)tr.data.ptr.offsets);
+			     (u64)trd->data.ptr.buffer,
+			     (u64)trd->data.ptr.offsets);
 
 		if (t_from)
 			binder_thread_dec_tmpref(t_from);
 		t->buffer->allow_user_free = 1;
-		if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) {
+		if (cmd != BR_REPLY && !(t->flags & TF_ONE_WAY)) {
 			binder_inner_proc_lock(thread->proc);
 			t->to_parent = thread->transaction_stack;
 			t->to_thread = thread;
@@ -4690,7 +4863,8 @@ out:
 	return ret;
 }
 
-static int binder_ioctl_set_ctx_mgr(struct file *filp)
+static int binder_ioctl_set_ctx_mgr(struct file *filp,
+				    struct flat_binder_object *fbo)
 {
 	int ret = 0;
 	struct binder_proc *proc = filp->private_data;
@@ -4719,7 +4893,7 @@ static int binder_ioctl_set_ctx_mgr(struct file *filp)
 	} else {
 		context->binder_context_mgr_uid = curr_euid;
 	}
-	new_node = binder_new_node(proc, NULL);
+	new_node = binder_new_node(proc, fbo);
 	if (!new_node) {
 		ret = -ENOMEM;
 		goto out;
@@ -4842,8 +5016,20 @@ static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		binder_inner_proc_unlock(proc);
 		break;
 	}
+	case BINDER_SET_CONTEXT_MGR_EXT: {
+		struct flat_binder_object fbo;
+
+		if (copy_from_user(&fbo, ubuf, sizeof(fbo))) {
+			ret = -EINVAL;
+			goto err;
+		}
+		ret = binder_ioctl_set_ctx_mgr(filp, &fbo);
+		if (ret)
+			goto err;
+		break;
+	}
 	case BINDER_SET_CONTEXT_MGR:
-		ret = binder_ioctl_set_ctx_mgr(filp);
+		ret = binder_ioctl_set_ctx_mgr(filp, NULL);
 		if (ret)
 			goto err;
 		break;
@@ -5319,7 +5505,7 @@ static void print_binder_transaction_ilocked(struct seq_file *m,
 		seq_printf(m, " node %d", buffer->target_node->debug_id);
 	seq_printf(m, " size %zd:%zd data %pK\n",
 		   buffer->data_size, buffer->offsets_size,
-		   buffer->data);
+		   buffer->user_data);
 }
 
 static void print_binder_work_ilocked(struct seq_file *m,