Merge tag 'nvme-6.2-2023-01-12' of git://git.infradead.org/nvme into block-6.2

Pull NVMe fixes from Christoph:

"nvme fixes for Linux 6.2

 - Identify quirks for Apple controllers (Hector Martin)
 - fix error handling in nvme_pci_enable (Tong Zhang)
 - refuse unprivileged passthrough on partitions (Christoph Hellwig)
 - fix MAINTAINERS to not match nvmem subsystem headers (Russell King)"

* tag 'nvme-6.2-2023-01-12' of git://git.infradead.org/nvme:
  MAINTAINERS: stop nvme matching for nvmem files
  nvme: don't allow unprivileged passthrough on partitions
  nvme: replace the "bool vec" arguments with flags in the ioctl path
  nvme: remove __nvme_ioctl
  nvme-pci: fix error handling in nvme_pci_enable()
  nvme-pci: add NVME_QUIRK_IDENTIFY_CNS quirk to Apple T2 controllers
  nvme-apple: add NVME_QUIRK_IDENTIFY_CNS quirk to fix regression

4 files changed, 75 insertions, 52 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 3ef137fea4f6db..b9800f5cca6d64 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14830,7 +14830,8 @@ T:	git://git.infradead.org/nvme.git
 F:	Documentation/nvme/
 F:	drivers/nvme/host/
 F:	drivers/nvme/common/
-F:	include/linux/nvme*
+F:	include/linux/nvme.h
+F:	include/linux/nvme-*.h
 F:	include/uapi/linux/nvme_ioctl.h
 
 NVM EXPRESS FABRICS AUTHENTICATION
diff --git a/drivers/nvme/host/apple.c b/drivers/nvme/host/apple.c
index e36aeb50b4edc1..bf1c60edb7f9ab 100644
--- a/drivers/nvme/host/apple.c
+++ b/drivers/nvme/host/apple.c
@@ -1493,7 +1493,7 @@ static int apple_nvme_probe(struct platform_device *pdev)
 	}
 
 	ret = nvme_init_ctrl(&anv->ctrl, anv->dev, &nvme_ctrl_ops,
-			     NVME_QUIRK_SKIP_CID_GEN);
+			     NVME_QUIRK_SKIP_CID_GEN | NVME_QUIRK_IDENTIFY_CNS);
 	if (ret) {
 		dev_err_probe(dev, ret, "Failed to initialize nvme_ctrl");
 		goto put_dev;
diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c
index a8639919237e6a..06f52db34be9bd 100644
--- a/drivers/nvme/host/ioctl.c
+++ b/drivers/nvme/host/ioctl.c
@@ -8,8 +8,13 @@
 #include <linux/io_uring.h>
 #include "nvme.h"
 
+enum {
+	NVME_IOCTL_VEC		= (1 << 0),
+	NVME_IOCTL_PARTITION	= (1 << 1),
+};
+
 static bool nvme_cmd_allowed(struct nvme_ns *ns, struct nvme_command *c,
-		fmode_t mode)
+		unsigned int flags, fmode_t mode)
 {
 	u32 effects;
 
@@ -17,6 +22,13 @@ static bool nvme_cmd_allowed(struct nvme_ns *ns, struct nvme_command *c,
 		return true;
 
 	/*
+	 * Do not allow unprivileged passthrough on partitions, as that allows an
+	 * escape from the containment of the partition.
+	 */
+	if (flags & NVME_IOCTL_PARTITION)
+		return false;
+
+	/*
 	 * Do not allow unprivileged processes to send vendor specific or fabrics
 	 * commands as we can't be sure about their effects.
 	 */
@@ -150,7 +162,7 @@ static struct request *nvme_alloc_user_request(struct request_queue *q,
 static int nvme_map_user_request(struct request *req, u64 ubuffer,
 		unsigned bufflen, void __user *meta_buffer, unsigned meta_len,
 		u32 meta_seed, void **metap, struct io_uring_cmd *ioucmd,
-		bool vec)
+		unsigned int flags)
 {
 	struct request_queue *q = req->q;
 	struct nvme_ns *ns = q->queuedata;
@@ -163,7 +175,7 @@ static int nvme_map_user_request(struct request *req, u64 ubuffer,
 		struct iov_iter iter;
 
 		/* fixedbufs is only for non-vectored io */
-		if (WARN_ON_ONCE(vec))
+		if (WARN_ON_ONCE(flags & NVME_IOCTL_VEC))
 			return -EINVAL;
 		ret = io_uring_cmd_import_fixed(ubuffer, bufflen,
 				rq_data_dir(req), &iter, ioucmd);
@@ -172,8 +184,8 @@ static int nvme_map_user_request(struct request *req, u64 ubuffer,
 		ret = blk_rq_map_user_iov(q, req, NULL, &iter, GFP_KERNEL);
 	} else {
 		ret = blk_rq_map_user_io(req, NULL, nvme_to_user_ptr(ubuffer),
-				bufflen, GFP_KERNEL, vec, 0, 0,
-				rq_data_dir(req));
+				bufflen, GFP_KERNEL, flags & NVME_IOCTL_VEC, 0,
+				0, rq_data_dir(req));
 	}
 
 	if (ret)
@@ -203,9 +215,9 @@ out:
 }
 
 static int nvme_submit_user_cmd(struct request_queue *q,
-		struct nvme_command *cmd, u64 ubuffer,
-		unsigned bufflen, void __user *meta_buffer, unsigned meta_len,
-		u32 meta_seed, u64 *result, unsigned timeout, bool vec)
+		struct nvme_command *cmd, u64 ubuffer, unsigned bufflen,
+		void __user *meta_buffer, unsigned meta_len, u32 meta_seed,
+		u64 *result, unsigned timeout, unsigned int flags)
 {
 	struct nvme_ctrl *ctrl;
 	struct request *req;
@@ -221,7 +233,7 @@ static int nvme_submit_user_cmd(struct request_queue *q,
 	req->timeout = timeout;
 	if (ubuffer && bufflen) {
 		ret = nvme_map_user_request(req, ubuffer, bufflen, meta_buffer,
-				meta_len, meta_seed, &meta, NULL, vec);
+				meta_len, meta_seed, &meta, NULL, flags);
 		if (ret)
 			return ret;
 	}
@@ -304,10 +316,8 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
 	c.rw.apptag = cpu_to_le16(io.apptag);
 	c.rw.appmask = cpu_to_le16(io.appmask);
 
-	return nvme_submit_user_cmd(ns->queue, &c,
-			io.addr, length,
-			metadata, meta_len, lower_32_bits(io.slba), NULL, 0,
-			false);
+	return nvme_submit_user_cmd(ns->queue, &c, io.addr, length, metadata,
+			meta_len, lower_32_bits(io.slba), NULL, 0, 0);
 }
 
 static bool nvme_validate_passthru_nsid(struct nvme_ctrl *ctrl,
@@ -325,7 +335,8 @@ static bool nvme_validate_passthru_nsid(struct nvme_ctrl *ctrl,
 }
 
 static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
-			struct nvme_passthru_cmd __user *ucmd, fmode_t mode)
+		struct nvme_passthru_cmd __user *ucmd, unsigned int flags,
+		fmode_t mode)
 {
 	struct nvme_passthru_cmd cmd;
 	struct nvme_command c;
@@ -353,16 +364,15 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
 	c.common.cdw14 = cpu_to_le32(cmd.cdw14);
 	c.common.cdw15 = cpu_to_le32(cmd.cdw15);
 
-	if (!nvme_cmd_allowed(ns, &c, mode))
+	if (!nvme_cmd_allowed(ns, &c, 0, mode))
 		return -EACCES;
 
 	if (cmd.timeout_ms)
 		timeout = msecs_to_jiffies(cmd.timeout_ms);
 
 	status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
-			cmd.addr, cmd.data_len,
-			nvme_to_user_ptr(cmd.metadata), cmd.metadata_len,
-			0, &result, timeout, false);
+			cmd.addr, cmd.data_len, nvme_to_user_ptr(cmd.metadata),
+			cmd.metadata_len, 0, &result, timeout, 0);
 
 	if (status >= 0) {
 		if (put_user(result, &ucmd->result))
@@ -373,8 +383,8 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
 }
 
 static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
-			struct nvme_passthru_cmd64 __user *ucmd, bool vec,
-			fmode_t mode)
+		struct nvme_passthru_cmd64 __user *ucmd, unsigned int flags,
+		fmode_t mode)
 {
 	struct nvme_passthru_cmd64 cmd;
 	struct nvme_command c;
@@ -401,16 +411,15 @@ static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
 	c.common.cdw14 = cpu_to_le32(cmd.cdw14);
 	c.common.cdw15 = cpu_to_le32(cmd.cdw15);
 
-	if (!nvme_cmd_allowed(ns, &c, mode))
+	if (!nvme_cmd_allowed(ns, &c, flags, mode))
 		return -EACCES;
 
 	if (cmd.timeout_ms)
 		timeout = msecs_to_jiffies(cmd.timeout_ms);
 
 	status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
-			cmd.addr, cmd.data_len,
-			nvme_to_user_ptr(cmd.metadata), cmd.metadata_len,
-			0, &cmd.result, timeout, vec);
+			cmd.addr, cmd.data_len, nvme_to_user_ptr(cmd.metadata),
+			cmd.metadata_len, 0, &cmd.result, timeout, flags);
 
 	if (status >= 0) {
 		if (put_user(cmd.result, &ucmd->result))
@@ -571,7 +580,7 @@ static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
 	c.common.cdw14 = cpu_to_le32(READ_ONCE(cmd->cdw14));
 	c.common.cdw15 = cpu_to_le32(READ_ONCE(cmd->cdw15));
 
-	if (!nvme_cmd_allowed(ns, &c, ioucmd->file->f_mode))
+	if (!nvme_cmd_allowed(ns, &c, 0, ioucmd->file->f_mode))
 		return -EACCES;
 
 	d.metadata = READ_ONCE(cmd->metadata);
@@ -641,9 +650,9 @@ static int nvme_ctrl_ioctl(struct nvme_ctrl *ctrl, unsigned int cmd,
 {
 	switch (cmd) {
 	case NVME_IOCTL_ADMIN_CMD:
-		return nvme_user_cmd(ctrl, NULL, argp, mode);
+		return nvme_user_cmd(ctrl, NULL, argp, 0, mode);
 	case NVME_IOCTL_ADMIN64_CMD:
-		return nvme_user_cmd64(ctrl, NULL, argp, false, mode);
+		return nvme_user_cmd64(ctrl, NULL, argp, 0, mode);
 	default:
 		return sed_ioctl(ctrl->opal_dev, cmd, argp);
 	}
@@ -668,14 +677,14 @@ struct nvme_user_io32 {
 #endif /* COMPAT_FOR_U64_ALIGNMENT */
 
 static int nvme_ns_ioctl(struct nvme_ns *ns, unsigned int cmd,
-		void __user *argp, fmode_t mode)
+		void __user *argp, unsigned int flags, fmode_t mode)
 {
 	switch (cmd) {
 	case NVME_IOCTL_ID:
 		force_successful_syscall_return();
 		return ns->head->ns_id;
 	case NVME_IOCTL_IO_CMD:
-		return nvme_user_cmd(ns->ctrl, ns, argp, mode);
+		return nvme_user_cmd(ns->ctrl, ns, argp, flags, mode);
 	/*
 	 * struct nvme_user_io can have different padding on some 32-bit ABIs.
 	 * Just accept the compat version as all fields that are used are the
@@ -686,37 +695,40 @@ static int nvme_ns_ioctl(struct nvme_ns *ns, unsigned int cmd,
 #endif
 	case NVME_IOCTL_SUBMIT_IO:
 		return nvme_submit_io(ns, argp);
-	case NVME_IOCTL_IO64_CMD:
-		return nvme_user_cmd64(ns->ctrl, ns, argp, false, mode);
 	case NVME_IOCTL_IO64_CMD_VEC:
-		return nvme_user_cmd64(ns->ctrl, ns, argp, true, mode);
+		flags |= NVME_IOCTL_VEC;
+		fallthrough;
+	case NVME_IOCTL_IO64_CMD:
+		return nvme_user_cmd64(ns->ctrl, ns, argp, flags, mode);
 	default:
 		return -ENOTTY;
 	}
 }
 
-static int __nvme_ioctl(struct nvme_ns *ns, unsigned int cmd, void __user *arg,
-			fmode_t mode)
-{
-	if (is_ctrl_ioctl(cmd))
-		return nvme_ctrl_ioctl(ns->ctrl, cmd, arg, mode);
-	return nvme_ns_ioctl(ns, cmd, arg, mode);
-}
-
 int nvme_ioctl(struct block_device *bdev, fmode_t mode,
 		unsigned int cmd, unsigned long arg)
 {
 	struct nvme_ns *ns = bdev->bd_disk->private_data;
+	void __user *argp = (void __user *)arg;
+	unsigned int flags = 0;
 
-	return __nvme_ioctl(ns, cmd, (void __user *)arg, mode);
+	if (bdev_is_partition(bdev))
+		flags |= NVME_IOCTL_PARTITION;
+
+	if (is_ctrl_ioctl(cmd))
+		return nvme_ctrl_ioctl(ns->ctrl, cmd, argp, mode);
+	return nvme_ns_ioctl(ns, cmd, argp, flags, mode);
 }
 
 long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	struct nvme_ns *ns =
 		container_of(file_inode(file)->i_cdev, struct nvme_ns, cdev);
+	void __user *argp = (void __user *)arg;
 
-	return __nvme_ioctl(ns, cmd, (void __user *)arg, file->f_mode);
+	if (is_ctrl_ioctl(cmd))
+		return nvme_ctrl_ioctl(ns->ctrl, cmd, argp, file->f_mode);
+	return nvme_ns_ioctl(ns, cmd, argp, 0, file->f_mode);
 }
 
 static int nvme_uring_cmd_checks(unsigned int issue_flags)
@@ -806,6 +818,10 @@ int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
 	void __user *argp = (void __user *)arg;
 	struct nvme_ns *ns;
 	int srcu_idx, ret = -EWOULDBLOCK;
+	unsigned int flags = 0;
+
+	if (bdev_is_partition(bdev))
+		flags |= NVME_IOCTL_PARTITION;
 
 	srcu_idx = srcu_read_lock(&head->srcu);
 	ns = nvme_find_path(head);
@@ -821,7 +837,7 @@ int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
 		return nvme_ns_head_ctrl_ioctl(ns, cmd, argp, head, srcu_idx,
 					mode);
 
-	ret = nvme_ns_ioctl(ns, cmd, argp, mode);
+	ret = nvme_ns_ioctl(ns, cmd, argp, flags, mode);
 out_unlock:
 	srcu_read_unlock(&head->srcu, srcu_idx);
 	return ret;
@@ -846,7 +862,7 @@ long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
 		return nvme_ns_head_ctrl_ioctl(ns, cmd, argp, head, srcu_idx,
 				file->f_mode);
 
-	ret = nvme_ns_ioctl(ns, cmd, argp, file->f_mode);
+	ret = nvme_ns_ioctl(ns, cmd, argp, 0, file->f_mode);
 out_unlock:
 	srcu_read_unlock(&head->srcu, srcu_idx);
 	return ret;
@@ -945,7 +961,7 @@ static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp,
 	kref_get(&ns->kref);
 	up_read(&ctrl->namespaces_rwsem);
 
-	ret = nvme_user_cmd(ctrl, ns, argp, mode);
+	ret = nvme_user_cmd(ctrl, ns, argp, 0, mode);
 	nvme_put_ns(ns);
 	return ret;
 
@@ -962,9 +978,9 @@ long nvme_dev_ioctl(struct file *file, unsigned int cmd,
 
 	switch (cmd) {
 	case NVME_IOCTL_ADMIN_CMD:
-		return nvme_user_cmd(ctrl, NULL, argp, file->f_mode);
+		return nvme_user_cmd(ctrl, NULL, argp, 0, file->f_mode);
 	case NVME_IOCTL_ADMIN64_CMD:
-		return nvme_user_cmd64(ctrl, NULL, argp, false, file->f_mode);
+		return nvme_user_cmd64(ctrl, NULL, argp, 0, file->f_mode);
 	case NVME_IOCTL_IO_CMD:
 		return nvme_dev_user_cmd(ctrl, argp, file->f_mode);
 	case NVME_IOCTL_RESET:
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index b13baccedb4a95..a2553b7d9bb8e6 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2533,7 +2533,7 @@ static int nvme_pci_enable(struct nvme_dev *dev)
 	 */
 	result = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
 	if (result < 0)
-		return result;
+		goto disable;
 
 	dev->ctrl.cap = lo_hi_readq(dev->bar + NVME_REG_CAP);
 
@@ -2586,8 +2586,13 @@ static int nvme_pci_enable(struct nvme_dev *dev)
 	pci_enable_pcie_error_reporting(pdev);
 	pci_save_state(pdev);
 
-	return nvme_pci_configure_admin_queue(dev);
+	result = nvme_pci_configure_admin_queue(dev);
+	if (result)
+		goto free_irq;
+	return result;
 
+ free_irq:
+	pci_free_irq_vectors(pdev);
  disable:
 	pci_disable_device(pdev);
 	return result;
@@ -3495,7 +3500,8 @@ static const struct pci_device_id nvme_id_table[] = {
 		.driver_data = NVME_QUIRK_SINGLE_VECTOR |
 				NVME_QUIRK_128_BYTES_SQES |
 				NVME_QUIRK_SHARED_TAGS |
-				NVME_QUIRK_SKIP_CID_GEN },
+				NVME_QUIRK_SKIP_CID_GEN |
+				NVME_QUIRK_IDENTIFY_CNS },
 	{ PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) },
 	{ 0, }
 };