Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 585 insertions, 0 deletions

diff --git a/crypto/lskcipher.c b/crypto/lskcipher.c
new file mode 100644
index 000000000..a8b075940
--- /dev/null
+++ b/crypto/lskcipher.c
@@ -0,0 +1,585 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Linear symmetric key cipher operations.
+ *
+ * Generic encrypt/decrypt wrapper for ciphers.
+ *
+ * Copyright (c) 2023 Herbert Xu <herbert@gondor.apana.org.au>
+ */
+
+#include <linux/cryptouser.h>
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/kernel.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <net/netlink.h>
+#include "skcipher.h"
+
+static inline struct crypto_lskcipher *__crypto_lskcipher_cast(
+	struct crypto_tfm *tfm)
+{
+	return container_of(tfm, struct crypto_lskcipher, base);
+}
+
+static inline struct lskcipher_alg *__crypto_lskcipher_alg(
+	struct crypto_alg *alg)
+{
+	return container_of(alg, struct lskcipher_alg, co.base);
+}
+
+static int lskcipher_setkey_unaligned(struct crypto_lskcipher *tfm,
+				      const u8 *key, unsigned int keylen)
+{
+	unsigned long alignmask = crypto_lskcipher_alignmask(tfm);
+	struct lskcipher_alg *cipher = crypto_lskcipher_alg(tfm);
+	u8 *buffer, *alignbuffer;
+	unsigned long absize;
+	int ret;
+
+	absize = keylen + alignmask;
+	buffer = kmalloc(absize, GFP_ATOMIC);
+	if (!buffer)
+		return -ENOMEM;
+
+	alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
+	memcpy(alignbuffer, key, keylen);
+	ret = cipher->setkey(tfm, alignbuffer, keylen);
+	kfree_sensitive(buffer);
+	return ret;
+}
+
+int crypto_lskcipher_setkey(struct crypto_lskcipher *tfm, const u8 *key,
+			    unsigned int keylen)
+{
+	unsigned long alignmask = crypto_lskcipher_alignmask(tfm);
+	struct lskcipher_alg *cipher = crypto_lskcipher_alg(tfm);
+
+	if (keylen < cipher->co.min_keysize || keylen > cipher->co.max_keysize)
+		return -EINVAL;
+
+	if ((unsigned long)key & alignmask)
+		return lskcipher_setkey_unaligned(tfm, key, keylen);
+	else
+		return cipher->setkey(tfm, key, keylen);
+}
+EXPORT_SYMBOL_GPL(crypto_lskcipher_setkey);
+
+static int crypto_lskcipher_crypt_unaligned(
+	struct crypto_lskcipher *tfm, const u8 *src, u8 *dst, unsigned len,
+	u8 *iv, int (*crypt)(struct crypto_lskcipher *tfm, const u8 *src,
+			     u8 *dst, unsigned len, u8 *iv, u32 flags))
+{
+	unsigned statesize = crypto_lskcipher_statesize(tfm);
+	unsigned ivsize = crypto_lskcipher_ivsize(tfm);
+	unsigned bs = crypto_lskcipher_blocksize(tfm);
+	unsigned cs = crypto_lskcipher_chunksize(tfm);
+	int err;
+	u8 *tiv;
+	u8 *p;
+
+	BUILD_BUG_ON(MAX_CIPHER_BLOCKSIZE > PAGE_SIZE ||
+		     MAX_CIPHER_ALIGNMASK >= PAGE_SIZE);
+
+	tiv = kmalloc(PAGE_SIZE, GFP_ATOMIC);
+	if (!tiv)
+		return -ENOMEM;
+
+	memcpy(tiv, iv, ivsize + statesize);
+
+	p = kmalloc(PAGE_SIZE, GFP_ATOMIC);
+	err = -ENOMEM;
+	if (!p)
+		goto out;
+
+	while (len >= bs) {
+		unsigned chunk = min((unsigned)PAGE_SIZE, len);
+
+		if (chunk > cs)
+			chunk &= ~(cs - 1);
+
+		memcpy(p, src, chunk);
+		err = crypt(tfm, p, p, chunk, tiv, CRYPTO_LSKCIPHER_FLAG_FINAL);
+		if (err)
+			goto out;
+
+		memcpy(dst, p, chunk);
+		src += chunk;
+		dst += chunk;
+		len -= chunk;
+	}
+
+	err = len ? -EINVAL : 0;
+
+out:
+	memcpy(iv, tiv, ivsize + statesize);
+	kfree_sensitive(p);
+	kfree_sensitive(tiv);
+	return err;
+}
+
+static int crypto_lskcipher_crypt(struct crypto_lskcipher *tfm, const u8 *src,
+				  u8 *dst, unsigned len, u8 *iv,
+				  int (*crypt)(struct crypto_lskcipher *tfm,
+					       const u8 *src, u8 *dst,
+					       unsigned len, u8 *iv,
+					       u32 flags))
+{
+	unsigned long alignmask = crypto_lskcipher_alignmask(tfm);
+
+	if (((unsigned long)src | (unsigned long)dst | (unsigned long)iv) &
+	    alignmask)
+		return crypto_lskcipher_crypt_unaligned(tfm, src, dst, len, iv,
+							crypt);
+
+	return crypt(tfm, src, dst, len, iv, CRYPTO_LSKCIPHER_FLAG_FINAL);
+}
+
+int crypto_lskcipher_encrypt(struct crypto_lskcipher *tfm, const u8 *src,
+			     u8 *dst, unsigned len, u8 *iv)
+{
+	struct lskcipher_alg *alg = crypto_lskcipher_alg(tfm);
+
+	return crypto_lskcipher_crypt(tfm, src, dst, len, iv, alg->encrypt);
+}
+EXPORT_SYMBOL_GPL(crypto_lskcipher_encrypt);
+
+int crypto_lskcipher_decrypt(struct crypto_lskcipher *tfm, const u8 *src,
+			     u8 *dst, unsigned len, u8 *iv)
+{
+	struct lskcipher_alg *alg = crypto_lskcipher_alg(tfm);
+
+	return crypto_lskcipher_crypt(tfm, src, dst, len, iv, alg->decrypt);
+}
+EXPORT_SYMBOL_GPL(crypto_lskcipher_decrypt);
+
+static int crypto_lskcipher_crypt_sg(struct skcipher_request *req,
+				     int (*crypt)(struct crypto_lskcipher *tfm,
+						  const u8 *src, u8 *dst,
+						  unsigned len, u8 *ivs,
+						  u32 flags))
+{
+	struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
+	struct crypto_lskcipher **ctx = crypto_skcipher_ctx(skcipher);
+	u8 *ivs = skcipher_request_ctx(req);
+	struct crypto_lskcipher *tfm = *ctx;
+	struct skcipher_walk walk;
+	unsigned ivsize;
+	u32 flags;
+	int err;
+
+	ivsize = crypto_lskcipher_ivsize(tfm);
+	ivs = PTR_ALIGN(ivs, crypto_skcipher_alignmask(skcipher) + 1);
+	memcpy(ivs, req->iv, ivsize);
+
+	flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;
+
+	if (req->base.flags & CRYPTO_SKCIPHER_REQ_CONT)
+		flags |= CRYPTO_LSKCIPHER_FLAG_CONT;
+
+	if (!(req->base.flags & CRYPTO_SKCIPHER_REQ_NOTFINAL))
+		flags |= CRYPTO_LSKCIPHER_FLAG_FINAL;
+
+	err = skcipher_walk_virt(&walk, req, false);
+
+	while (walk.nbytes) {
+		err = crypt(tfm, walk.src.virt.addr, walk.dst.virt.addr,
+			    walk.nbytes, ivs,
+			    flags & ~(walk.nbytes == walk.total ?
+			    0 : CRYPTO_LSKCIPHER_FLAG_FINAL));
+		err = skcipher_walk_done(&walk, err);
+		flags |= CRYPTO_LSKCIPHER_FLAG_CONT;
+	}
+
+	memcpy(req->iv, ivs, ivsize);
+
+	return err;
+}
+
+int crypto_lskcipher_encrypt_sg(struct skcipher_request *req)
+{
+	struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
+	struct crypto_lskcipher **ctx = crypto_skcipher_ctx(skcipher);
+	struct lskcipher_alg *alg = crypto_lskcipher_alg(*ctx);
+
+	return crypto_lskcipher_crypt_sg(req, alg->encrypt);
+}
+
+int crypto_lskcipher_decrypt_sg(struct skcipher_request *req)
+{
+	struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
+	struct crypto_lskcipher **ctx = crypto_skcipher_ctx(skcipher);
+	struct lskcipher_alg *alg = crypto_lskcipher_alg(*ctx);
+
+	return crypto_lskcipher_crypt_sg(req, alg->decrypt);
+}
+
+static void crypto_lskcipher_exit_tfm(struct crypto_tfm *tfm)
+{
+	struct crypto_lskcipher *skcipher = __crypto_lskcipher_cast(tfm);
+	struct lskcipher_alg *alg = crypto_lskcipher_alg(skcipher);
+
+	alg->exit(skcipher);
+}
+
+static int crypto_lskcipher_init_tfm(struct crypto_tfm *tfm)
+{
+	struct crypto_lskcipher *skcipher = __crypto_lskcipher_cast(tfm);
+	struct lskcipher_alg *alg = crypto_lskcipher_alg(skcipher);
+
+	if (alg->exit)
+		skcipher->base.exit = crypto_lskcipher_exit_tfm;
+
+	if (alg->init)
+		return alg->init(skcipher);
+
+	return 0;
+}
+
+static void crypto_lskcipher_free_instance(struct crypto_instance *inst)
+{
+	struct lskcipher_instance *skcipher =
+		container_of(inst, struct lskcipher_instance, s.base);
+
+	skcipher->free(skcipher);
+}
+
+static void __maybe_unused crypto_lskcipher_show(
+	struct seq_file *m, struct crypto_alg *alg)
+{
+	struct lskcipher_alg *skcipher = __crypto_lskcipher_alg(alg);
+
+	seq_printf(m, "type         : lskcipher\n");
+	seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
+	seq_printf(m, "min keysize  : %u\n", skcipher->co.min_keysize);
+	seq_printf(m, "max keysize  : %u\n", skcipher->co.max_keysize);
+	seq_printf(m, "ivsize       : %u\n", skcipher->co.ivsize);
+	seq_printf(m, "chunksize    : %u\n", skcipher->co.chunksize);
+	seq_printf(m, "statesize    : %u\n", skcipher->co.statesize);
+}
+
+static int __maybe_unused crypto_lskcipher_report(
+	struct sk_buff *skb, struct crypto_alg *alg)
+{
+	struct lskcipher_alg *skcipher = __crypto_lskcipher_alg(alg);
+	struct crypto_report_blkcipher rblkcipher = {
+		.type = "lskcipher",
+		.geniv = "<none>",
+	};
+
+	rblkcipher.blocksize = alg->cra_blocksize;
+	rblkcipher.min_keysize = skcipher->co.min_keysize;
+	rblkcipher.max_keysize = skcipher->co.max_keysize;
+	rblkcipher.ivsize = skcipher->co.ivsize;
+
+	return nla_put(skb, CRYPTOCFGA_REPORT_BLKCIPHER,
+		       sizeof(rblkcipher), &rblkcipher);
+}
+
+static const struct crypto_type crypto_lskcipher_type = {
+	.extsize = crypto_alg_extsize,
+	.init_tfm = crypto_lskcipher_init_tfm,
+	.free = crypto_lskcipher_free_instance,
+#ifdef CONFIG_PROC_FS
+	.show = crypto_lskcipher_show,
+#endif
+#if IS_ENABLED(CONFIG_CRYPTO_USER)
+	.report = crypto_lskcipher_report,
+#endif
+	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
+	.maskset = CRYPTO_ALG_TYPE_MASK,
+	.type = CRYPTO_ALG_TYPE_LSKCIPHER,
+	.tfmsize = offsetof(struct crypto_lskcipher, base),
+	.algsize = offsetof(struct lskcipher_alg, co.base),
+};
+
+static void crypto_lskcipher_exit_tfm_sg(struct crypto_tfm *tfm)
+{
+	struct crypto_lskcipher **ctx = crypto_tfm_ctx(tfm);
+
+	crypto_free_lskcipher(*ctx);
+}
+
+int crypto_init_lskcipher_ops_sg(struct crypto_tfm *tfm)
+{
+	struct crypto_lskcipher **ctx = crypto_tfm_ctx(tfm);
+	struct crypto_alg *calg = tfm->__crt_alg;
+	struct crypto_lskcipher *skcipher;
+
+	if (!crypto_mod_get(calg))
+		return -EAGAIN;
+
+	skcipher = crypto_create_tfm(calg, &crypto_lskcipher_type);
+	if (IS_ERR(skcipher)) {
+		crypto_mod_put(calg);
+		return PTR_ERR(skcipher);
+	}
+
+	*ctx = skcipher;
+	tfm->exit = crypto_lskcipher_exit_tfm_sg;
+
+	return 0;
+}
+
+int crypto_grab_lskcipher(struct crypto_lskcipher_spawn *spawn,
+			  struct crypto_instance *inst,
+			  const char *name, u32 type, u32 mask)
+{
+	spawn->base.frontend = &crypto_lskcipher_type;
+	return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_grab_lskcipher);
+
+struct crypto_lskcipher *crypto_alloc_lskcipher(const char *alg_name,
+						u32 type, u32 mask)
+{
+	return crypto_alloc_tfm(alg_name, &crypto_lskcipher_type, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_alloc_lskcipher);
+
+static int lskcipher_prepare_alg(struct lskcipher_alg *alg)
+{
+	struct crypto_alg *base = &alg->co.base;
+	int err;
+
+	err = skcipher_prepare_alg_common(&alg->co);
+	if (err)
+		return err;
+
+	if (alg->co.chunksize & (alg->co.chunksize - 1))
+		return -EINVAL;
+
+	base->cra_type = &crypto_lskcipher_type;
+	base->cra_flags |= CRYPTO_ALG_TYPE_LSKCIPHER;
+
+	return 0;
+}
+
+int crypto_register_lskcipher(struct lskcipher_alg *alg)
+{
+	struct crypto_alg *base = &alg->co.base;
+	int err;
+
+	err = lskcipher_prepare_alg(alg);
+	if (err)
+		return err;
+
+	return crypto_register_alg(base);
+}
+EXPORT_SYMBOL_GPL(crypto_register_lskcipher);
+
+void crypto_unregister_lskcipher(struct lskcipher_alg *alg)
+{
+	crypto_unregister_alg(&alg->co.base);
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_lskcipher);
+
+int crypto_register_lskciphers(struct lskcipher_alg *algs, int count)
+{
+	int i, ret;
+
+	for (i = 0; i < count; i++) {
+		ret = crypto_register_lskcipher(&algs[i]);
+		if (ret) {
+			crypto_unregister_lskciphers(algs, i);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_register_lskciphers);
+
+void crypto_unregister_lskciphers(struct lskcipher_alg *algs, int count)
+{
+	int i;
+
+	for (i = count - 1; i >= 0; --i)
+		crypto_unregister_lskcipher(&algs[i]);
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_lskciphers);
+
+int lskcipher_register_instance(struct crypto_template *tmpl,
+				struct lskcipher_instance *inst)
+{
+	int err;
+
+	if (WARN_ON(!inst->free))
+		return -EINVAL;
+
+	err = lskcipher_prepare_alg(&inst->alg);
+	if (err)
+		return err;
+
+	return crypto_register_instance(tmpl, lskcipher_crypto_instance(inst));
+}
+EXPORT_SYMBOL_GPL(lskcipher_register_instance);
+
+static int lskcipher_setkey_simple(struct crypto_lskcipher *tfm, const u8 *key,
+				   unsigned int keylen)
+{
+	struct crypto_lskcipher *cipher = lskcipher_cipher_simple(tfm);
+
+	crypto_lskcipher_clear_flags(cipher, CRYPTO_TFM_REQ_MASK);
+	crypto_lskcipher_set_flags(cipher, crypto_lskcipher_get_flags(tfm) &
+				   CRYPTO_TFM_REQ_MASK);
+	return crypto_lskcipher_setkey(cipher, key, keylen);
+}
+
+static int lskcipher_init_tfm_simple(struct crypto_lskcipher *tfm)
+{
+	struct lskcipher_instance *inst = lskcipher_alg_instance(tfm);
+	struct crypto_lskcipher **ctx = crypto_lskcipher_ctx(tfm);
+	struct crypto_lskcipher_spawn *spawn;
+	struct crypto_lskcipher *cipher;
+
+	spawn = lskcipher_instance_ctx(inst);
+	cipher = crypto_spawn_lskcipher(spawn);
+	if (IS_ERR(cipher))
+		return PTR_ERR(cipher);
+
+	*ctx = cipher;
+	return 0;
+}
+
+static void lskcipher_exit_tfm_simple(struct crypto_lskcipher *tfm)
+{
+	struct crypto_lskcipher **ctx = crypto_lskcipher_ctx(tfm);
+
+	crypto_free_lskcipher(*ctx);
+}
+
+static void lskcipher_free_instance_simple(struct lskcipher_instance *inst)
+{
+	crypto_drop_lskcipher(lskcipher_instance_ctx(inst));
+	kfree(inst);
+}
+
+/**
+ * lskcipher_alloc_instance_simple - allocate instance of simple block cipher
+ *
+ * Allocate an lskcipher_instance for a simple block cipher mode of operation,
+ * e.g. cbc or ecb.  The instance context will have just a single crypto_spawn,
+ * that for the underlying cipher.  The {min,max}_keysize, ivsize, blocksize,
+ * alignmask, and priority are set from the underlying cipher but can be
+ * overridden if needed.  The tfm context defaults to
+ * struct crypto_lskcipher *, and default ->setkey(), ->init(), and
+ * ->exit() methods are installed.
+ *
+ * @tmpl: the template being instantiated
+ * @tb: the template parameters
+ *
+ * Return: a pointer to the new instance, or an ERR_PTR().  The caller still
+ *	   needs to register the instance.
+ */
+struct lskcipher_instance *lskcipher_alloc_instance_simple(
+	struct crypto_template *tmpl, struct rtattr **tb)
+{
+	u32 mask;
+	struct lskcipher_instance *inst;
+	struct crypto_lskcipher_spawn *spawn;
+	char ecb_name[CRYPTO_MAX_ALG_NAME];
+	struct lskcipher_alg *cipher_alg;
+	const char *cipher_name;
+	int err;
+
+	err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_LSKCIPHER, &mask);
+	if (err)
+		return ERR_PTR(err);
+
+	cipher_name = crypto_attr_alg_name(tb[1]);
+	if (IS_ERR(cipher_name))
+		return ERR_CAST(cipher_name);
+
+	inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
+	if (!inst)
+		return ERR_PTR(-ENOMEM);
+
+	spawn = lskcipher_instance_ctx(inst);
+	err = crypto_grab_lskcipher(spawn,
+				    lskcipher_crypto_instance(inst),
+				    cipher_name, 0, mask);
+
+	ecb_name[0] = 0;
+	if (err == -ENOENT && !!memcmp(tmpl->name, "ecb", 4)) {
+		err = -ENAMETOOLONG;
+		if (snprintf(ecb_name, CRYPTO_MAX_ALG_NAME, "ecb(%s)",
+			     cipher_name) >= CRYPTO_MAX_ALG_NAME)
+			goto err_free_inst;
+
+		err = crypto_grab_lskcipher(spawn,
+					    lskcipher_crypto_instance(inst),
+					    ecb_name, 0, mask);
+	}
+
+	if (err)
+		goto err_free_inst;
+
+	cipher_alg = crypto_lskcipher_spawn_alg(spawn);
+
+	err = crypto_inst_setname(lskcipher_crypto_instance(inst), tmpl->name,
+				  &cipher_alg->co.base);
+	if (err)
+		goto err_free_inst;
+
+	if (ecb_name[0]) {
+		int len;
+
+		err = -EINVAL;
+		len = strscpy(ecb_name, &cipher_alg->co.base.cra_name[4]);
+		if (len < 2)
+			goto err_free_inst;
+
+		if (ecb_name[len - 1] != ')')
+			goto err_free_inst;
+
+		ecb_name[len - 1] = 0;
+
+		err = -ENAMETOOLONG;
+		if (snprintf(inst->alg.co.base.cra_name, CRYPTO_MAX_ALG_NAME,
+			     "%s(%s)", tmpl->name, ecb_name) >=
+		    CRYPTO_MAX_ALG_NAME)
+			goto err_free_inst;
+
+		if (strcmp(ecb_name, cipher_name) &&
+		    snprintf(inst->alg.co.base.cra_driver_name,
+			     CRYPTO_MAX_ALG_NAME,
+			     "%s(%s)", tmpl->name, cipher_name) >=
+		    CRYPTO_MAX_ALG_NAME)
+			goto err_free_inst;
+	} else {
+		/* Don't allow nesting. */
+		err = -ELOOP;
+		if ((cipher_alg->co.base.cra_flags & CRYPTO_ALG_INSTANCE))
+			goto err_free_inst;
+	}
+
+	err = -EINVAL;
+	if (cipher_alg->co.ivsize)
+		goto err_free_inst;
+
+	inst->free = lskcipher_free_instance_simple;
+
+	/* Default algorithm properties, can be overridden */
+	inst->alg.co.base.cra_blocksize = cipher_alg->co.base.cra_blocksize;
+	inst->alg.co.base.cra_alignmask = cipher_alg->co.base.cra_alignmask;
+	inst->alg.co.base.cra_priority = cipher_alg->co.base.cra_priority;
+	inst->alg.co.min_keysize = cipher_alg->co.min_keysize;
+	inst->alg.co.max_keysize = cipher_alg->co.max_keysize;
+	inst->alg.co.ivsize = cipher_alg->co.base.cra_blocksize;
+	inst->alg.co.statesize = cipher_alg->co.statesize;
+
+	/* Use struct crypto_lskcipher * by default, can be overridden */
+	inst->alg.co.base.cra_ctxsize = sizeof(struct crypto_lskcipher *);
+	inst->alg.setkey = lskcipher_setkey_simple;
+	inst->alg.init = lskcipher_init_tfm_simple;
+	inst->alg.exit = lskcipher_exit_tfm_simple;
+
+	return inst;
+
+err_free_inst:
+	lskcipher_free_instance_simple(inst);
+	return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(lskcipher_alloc_instance_simple);