commit: d6910b9c9e9c1e01230192b5ac901136b1d38b8a Author: Mike Pagano <mpagano <AT> gentoo <DOT> org> AuthorDate: Sat Sep 12 17:50:09 2020 +0000 Commit: Mike Pagano <mpagano <AT> gentoo <DOT> org> CommitDate: Sat Sep 12 17:50:09 2020 +0000 URL: https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=d6910b9c
Linux patch 4.14.198 Signed-off-by: Mike Pagano <mpagano <AT> gentoo.org> 0000_README | 4 + 1197_linux-4.14.198.patch | 1173 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 1177 insertions(+) diff --git a/0000_README b/0000_README index 7b69642..eaa0c57 100644 --- a/0000_README +++ b/0000_README @@ -831,6 +831,10 @@ Patch: 1196_linux-4.14.197.patch From: https://www.kernel.org Desc: Linux 4.14.197 +Patch: 1197_linux-4.14.198.patch +From: https://www.kernel.org +Desc: Linux 4.14.198 + Patch: 1500_XATTR_USER_PREFIX.patch From: https://bugs.gentoo.org/show_bug.cgi?id=470644 Desc: Support for namespace user.pax.* on tmpfs. diff --git a/1197_linux-4.14.198.patch b/1197_linux-4.14.198.patch new file mode 100644 index 0000000..03ac8d4 --- /dev/null +++ b/1197_linux-4.14.198.patch @@ -0,0 +1,1173 @@ +diff --git a/Makefile b/Makefile +index 3712b4deafbed..d503d041b5267 100644 +--- a/Makefile ++++ b/Makefile +@@ -1,7 +1,7 @@ + # SPDX-License-Identifier: GPL-2.0 + VERSION = 4 + PATCHLEVEL = 14 +-SUBLEVEL = 197 ++SUBLEVEL = 198 + EXTRAVERSION = + NAME = Petit Gorille + +diff --git a/block/blk-core.c b/block/blk-core.c +index 4e04c79aa2c27..2407c898ba7d8 100644 +--- a/block/blk-core.c ++++ b/block/blk-core.c +@@ -852,6 +852,8 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id) + + q->backing_dev_info->ra_pages = + (VM_MAX_READAHEAD * 1024) / PAGE_SIZE; ++ q->backing_dev_info->io_pages = ++ (VM_MAX_READAHEAD * 1024) / PAGE_SIZE; + q->backing_dev_info->capabilities = BDI_CAP_CGROUP_WRITEBACK; + q->backing_dev_info->name = "block"; + q->node = node_id; +diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c +index 7de38ae5c18f2..a03239ba1a323 100644 +--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c ++++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c +@@ -6378,14 +6378,14 @@ static int __bnxt_open_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init) + } + } + +- bnxt_enable_napi(bp); +- + rc = bnxt_init_nic(bp, irq_re_init); + if (rc) { + netdev_err(bp->dev, "bnxt_init_nic err: %x\n", rc); +- goto open_err; ++ goto open_err_irq; + } + ++ bnxt_enable_napi(bp); ++ + if (link_re_init) { + mutex_lock(&bp->link_lock); + rc = bnxt_update_phy_setting(bp); +@@ -6410,9 +6410,6 @@ static int __bnxt_open_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init) + bnxt_vf_reps_open(bp); + return 0; + +-open_err: +- bnxt_disable_napi(bp); +- + open_err_irq: + bnxt_del_napi(bp); + +diff --git a/drivers/net/usb/dm9601.c b/drivers/net/usb/dm9601.c +index b91f92e4e5f22..915ac75b55fc7 100644 +--- a/drivers/net/usb/dm9601.c ++++ b/drivers/net/usb/dm9601.c +@@ -625,6 +625,10 @@ static const struct usb_device_id products[] = { + USB_DEVICE(0x0a46, 0x1269), /* DM9621A USB to Fast Ethernet Adapter */ + .driver_info = (unsigned long)&dm9601_info, + }, ++ { ++ USB_DEVICE(0x0586, 0x3427), /* ZyXEL Keenetic Plus DSL xDSL modem */ ++ .driver_info = (unsigned long)&dm9601_info, ++ }, + {}, // END + }; + +diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c +index 550ab7707b57f..794dc90aa5c95 100644 +--- a/drivers/vfio/pci/vfio_pci.c ++++ b/drivers/vfio/pci/vfio_pci.c +@@ -29,6 +29,7 @@ + #include <linux/vfio.h> + #include <linux/vgaarb.h> + #include <linux/nospec.h> ++#include <linux/sched/mm.h> + + #include "vfio_pci_private.h" + +@@ -181,6 +182,7 @@ no_mmap: + + static void vfio_pci_try_bus_reset(struct vfio_pci_device *vdev); + static void vfio_pci_disable(struct vfio_pci_device *vdev); ++static int vfio_pci_try_zap_and_vma_lock_cb(struct pci_dev *pdev, void *data); + + /* + * INTx masking requires the ability to disable INTx signaling via PCI_COMMAND +@@ -644,6 +646,12 @@ int vfio_pci_register_dev_region(struct vfio_pci_device *vdev, + return 0; + } + ++struct vfio_devices { ++ struct vfio_device **devices; ++ int cur_index; ++ int max_index; ++}; ++ + static long vfio_pci_ioctl(void *device_data, + unsigned int cmd, unsigned long arg) + { +@@ -717,7 +725,7 @@ static long vfio_pci_ioctl(void *device_data, + { + void __iomem *io; + size_t size; +- u16 orig_cmd; ++ u16 cmd; + + info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); + info.flags = 0; +@@ -737,10 +745,7 @@ static long vfio_pci_ioctl(void *device_data, + * Is it really there? Enable memory decode for + * implicit access in pci_map_rom(). + */ +- pci_read_config_word(pdev, PCI_COMMAND, &orig_cmd); +- pci_write_config_word(pdev, PCI_COMMAND, +- orig_cmd | PCI_COMMAND_MEMORY); +- ++ cmd = vfio_pci_memory_lock_and_enable(vdev); + io = pci_map_rom(pdev, &size); + if (io) { + info.flags = VFIO_REGION_INFO_FLAG_READ; +@@ -748,8 +753,8 @@ static long vfio_pci_ioctl(void *device_data, + } else { + info.size = 0; + } ++ vfio_pci_memory_unlock_and_restore(vdev, cmd); + +- pci_write_config_word(pdev, PCI_COMMAND, orig_cmd); + break; + } + case VFIO_PCI_VGA_REGION_INDEX: +@@ -885,8 +890,16 @@ static long vfio_pci_ioctl(void *device_data, + return ret; + + } else if (cmd == VFIO_DEVICE_RESET) { +- return vdev->reset_works ? +- pci_try_reset_function(vdev->pdev) : -EINVAL; ++ int ret; ++ ++ if (!vdev->reset_works) ++ return -EINVAL; ++ ++ vfio_pci_zap_and_down_write_memory_lock(vdev); ++ ret = pci_try_reset_function(vdev->pdev); ++ up_write(&vdev->memory_lock); ++ ++ return ret; + + } else if (cmd == VFIO_DEVICE_GET_PCI_HOT_RESET_INFO) { + struct vfio_pci_hot_reset_info hdr; +@@ -966,8 +979,9 @@ reset_info_exit: + int32_t *group_fds; + struct vfio_pci_group_entry *groups; + struct vfio_pci_group_info info; ++ struct vfio_devices devs = { .cur_index = 0 }; + bool slot = false; +- int i, count = 0, ret = 0; ++ int i, group_idx, mem_idx = 0, count = 0, ret = 0; + + minsz = offsetofend(struct vfio_pci_hot_reset, count); + +@@ -1019,9 +1033,9 @@ reset_info_exit: + * user interface and store the group and iommu ID. This + * ensures the group is held across the reset. + */ +- for (i = 0; i < hdr.count; i++) { ++ for (group_idx = 0; group_idx < hdr.count; group_idx++) { + struct vfio_group *group; +- struct fd f = fdget(group_fds[i]); ++ struct fd f = fdget(group_fds[group_idx]); + if (!f.file) { + ret = -EBADF; + break; +@@ -1034,8 +1048,9 @@ reset_info_exit: + break; + } + +- groups[i].group = group; +- groups[i].id = vfio_external_user_iommu_id(group); ++ groups[group_idx].group = group; ++ groups[group_idx].id = ++ vfio_external_user_iommu_id(group); + } + + kfree(group_fds); +@@ -1054,14 +1069,65 @@ reset_info_exit: + ret = vfio_pci_for_each_slot_or_bus(vdev->pdev, + vfio_pci_validate_devs, + &info, slot); +- if (!ret) +- /* User has access, do the reset */ +- ret = slot ? pci_try_reset_slot(vdev->pdev->slot) : +- pci_try_reset_bus(vdev->pdev->bus); ++ ++ if (ret) ++ goto hot_reset_release; ++ ++ devs.max_index = count; ++ devs.devices = kcalloc(count, sizeof(struct vfio_device *), ++ GFP_KERNEL); ++ if (!devs.devices) { ++ ret = -ENOMEM; ++ goto hot_reset_release; ++ } ++ ++ /* ++ * We need to get memory_lock for each device, but devices ++ * can share mmap_sem, therefore we need to zap and hold ++ * the vma_lock for each device, and only then get each ++ * memory_lock. ++ */ ++ ret = vfio_pci_for_each_slot_or_bus(vdev->pdev, ++ vfio_pci_try_zap_and_vma_lock_cb, ++ &devs, slot); ++ if (ret) ++ goto hot_reset_release; ++ ++ for (; mem_idx < devs.cur_index; mem_idx++) { ++ struct vfio_pci_device *tmp; ++ ++ tmp = vfio_device_data(devs.devices[mem_idx]); ++ ++ ret = down_write_trylock(&tmp->memory_lock); ++ if (!ret) { ++ ret = -EBUSY; ++ goto hot_reset_release; ++ } ++ mutex_unlock(&tmp->vma_lock); ++ } ++ ++ /* User has access, do the reset */ ++ ret = slot ? pci_try_reset_slot(vdev->pdev->slot) : ++ pci_try_reset_bus(vdev->pdev->bus); + + hot_reset_release: +- for (i--; i >= 0; i--) +- vfio_group_put_external_user(groups[i].group); ++ for (i = 0; i < devs.cur_index; i++) { ++ struct vfio_device *device; ++ struct vfio_pci_device *tmp; ++ ++ device = devs.devices[i]; ++ tmp = vfio_device_data(device); ++ ++ if (i < mem_idx) ++ up_write(&tmp->memory_lock); ++ else ++ mutex_unlock(&tmp->vma_lock); ++ vfio_device_put(device); ++ } ++ kfree(devs.devices); ++ ++ for (group_idx--; group_idx >= 0; group_idx--) ++ vfio_group_put_external_user(groups[group_idx].group); + + kfree(groups); + return ret; +@@ -1120,6 +1186,202 @@ static ssize_t vfio_pci_write(void *device_data, const char __user *buf, + return vfio_pci_rw(device_data, (char __user *)buf, count, ppos, true); + } + ++/* Return 1 on zap and vma_lock acquired, 0 on contention (only with @try) */ ++static int vfio_pci_zap_and_vma_lock(struct vfio_pci_device *vdev, bool try) ++{ ++ struct vfio_pci_mmap_vma *mmap_vma, *tmp; ++ ++ /* ++ * Lock ordering: ++ * vma_lock is nested under mmap_sem for vm_ops callback paths. ++ * The memory_lock semaphore is used by both code paths calling ++ * into this function to zap vmas and the vm_ops.fault callback ++ * to protect the memory enable state of the device. ++ * ++ * When zapping vmas we need to maintain the mmap_sem => vma_lock ++ * ordering, which requires using vma_lock to walk vma_list to ++ * acquire an mm, then dropping vma_lock to get the mmap_sem and ++ * reacquiring vma_lock. This logic is derived from similar ++ * requirements in uverbs_user_mmap_disassociate(). ++ * ++ * mmap_sem must always be the top-level lock when it is taken. ++ * Therefore we can only hold the memory_lock write lock when ++ * vma_list is empty, as we'd need to take mmap_sem to clear ++ * entries. vma_list can only be guaranteed empty when holding ++ * vma_lock, thus memory_lock is nested under vma_lock. ++ * ++ * This enables the vm_ops.fault callback to acquire vma_lock, ++ * followed by memory_lock read lock, while already holding ++ * mmap_sem without risk of deadlock. ++ */ ++ while (1) { ++ struct mm_struct *mm = NULL; ++ ++ if (try) { ++ if (!mutex_trylock(&vdev->vma_lock)) ++ return 0; ++ } else { ++ mutex_lock(&vdev->vma_lock); ++ } ++ while (!list_empty(&vdev->vma_list)) { ++ mmap_vma = list_first_entry(&vdev->vma_list, ++ struct vfio_pci_mmap_vma, ++ vma_next); ++ mm = mmap_vma->vma->vm_mm; ++ if (mmget_not_zero(mm)) ++ break; ++ ++ list_del(&mmap_vma->vma_next); ++ kfree(mmap_vma); ++ mm = NULL; ++ } ++ if (!mm) ++ return 1; ++ mutex_unlock(&vdev->vma_lock); ++ ++ if (try) { ++ if (!down_read_trylock(&mm->mmap_sem)) { ++ mmput(mm); ++ return 0; ++ } ++ } else { ++ down_read(&mm->mmap_sem); ++ } ++ if (mmget_still_valid(mm)) { ++ if (try) { ++ if (!mutex_trylock(&vdev->vma_lock)) { ++ up_read(&mm->mmap_sem); ++ mmput(mm); ++ return 0; ++ } ++ } else { ++ mutex_lock(&vdev->vma_lock); ++ } ++ list_for_each_entry_safe(mmap_vma, tmp, ++ &vdev->vma_list, vma_next) { ++ struct vm_area_struct *vma = mmap_vma->vma; ++ ++ if (vma->vm_mm != mm) ++ continue; ++ ++ list_del(&mmap_vma->vma_next); ++ kfree(mmap_vma); ++ ++ zap_vma_ptes(vma, vma->vm_start, ++ vma->vm_end - vma->vm_start); ++ } ++ mutex_unlock(&vdev->vma_lock); ++ } ++ up_read(&mm->mmap_sem); ++ mmput(mm); ++ } ++} ++ ++void vfio_pci_zap_and_down_write_memory_lock(struct vfio_pci_device *vdev) ++{ ++ vfio_pci_zap_and_vma_lock(vdev, false); ++ down_write(&vdev->memory_lock); ++ mutex_unlock(&vdev->vma_lock); ++} ++ ++u16 vfio_pci_memory_lock_and_enable(struct vfio_pci_device *vdev) ++{ ++ u16 cmd; ++ ++ down_write(&vdev->memory_lock); ++ pci_read_config_word(vdev->pdev, PCI_COMMAND, &cmd); ++ if (!(cmd & PCI_COMMAND_MEMORY)) ++ pci_write_config_word(vdev->pdev, PCI_COMMAND, ++ cmd | PCI_COMMAND_MEMORY); ++ ++ return cmd; ++} ++ ++void vfio_pci_memory_unlock_and_restore(struct vfio_pci_device *vdev, u16 cmd) ++{ ++ pci_write_config_word(vdev->pdev, PCI_COMMAND, cmd); ++ up_write(&vdev->memory_lock); ++} ++ ++/* Caller holds vma_lock */ ++static int __vfio_pci_add_vma(struct vfio_pci_device *vdev, ++ struct vm_area_struct *vma) ++{ ++ struct vfio_pci_mmap_vma *mmap_vma; ++ ++ mmap_vma = kmalloc(sizeof(*mmap_vma), GFP_KERNEL); ++ if (!mmap_vma) ++ return -ENOMEM; ++ ++ mmap_vma->vma = vma; ++ list_add(&mmap_vma->vma_next, &vdev->vma_list); ++ ++ return 0; ++} ++ ++/* ++ * Zap mmaps on open so that we can fault them in on access and therefore ++ * our vma_list only tracks mappings accessed since last zap. ++ */ ++static void vfio_pci_mmap_open(struct vm_area_struct *vma) ++{ ++ zap_vma_ptes(vma, vma->vm_start, vma->vm_end - vma->vm_start); ++} ++ ++static void vfio_pci_mmap_close(struct vm_area_struct *vma) ++{ ++ struct vfio_pci_device *vdev = vma->vm_private_data; ++ struct vfio_pci_mmap_vma *mmap_vma; ++ ++ mutex_lock(&vdev->vma_lock); ++ list_for_each_entry(mmap_vma, &vdev->vma_list, vma_next) { ++ if (mmap_vma->vma == vma) { ++ list_del(&mmap_vma->vma_next); ++ kfree(mmap_vma); ++ break; ++ } ++ } ++ mutex_unlock(&vdev->vma_lock); ++} ++ ++static int vfio_pci_mmap_fault(struct vm_fault *vmf) ++{ ++ struct vm_area_struct *vma = vmf->vma; ++ struct vfio_pci_device *vdev = vma->vm_private_data; ++ int ret = VM_FAULT_NOPAGE; ++ ++ mutex_lock(&vdev->vma_lock); ++ down_read(&vdev->memory_lock); ++ ++ if (!__vfio_pci_memory_enabled(vdev)) { ++ ret = VM_FAULT_SIGBUS; ++ mutex_unlock(&vdev->vma_lock); ++ goto up_out; ++ } ++ ++ if (__vfio_pci_add_vma(vdev, vma)) { ++ ret = VM_FAULT_OOM; ++ mutex_unlock(&vdev->vma_lock); ++ goto up_out; ++ } ++ ++ mutex_unlock(&vdev->vma_lock); ++ ++ if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, ++ vma->vm_end - vma->vm_start, vma->vm_page_prot)) ++ ret = VM_FAULT_SIGBUS; ++ ++up_out: ++ up_read(&vdev->memory_lock); ++ return ret; ++} ++ ++static const struct vm_operations_struct vfio_pci_mmap_ops = { ++ .open = vfio_pci_mmap_open, ++ .close = vfio_pci_mmap_close, ++ .fault = vfio_pci_mmap_fault, ++}; ++ + static int vfio_pci_mmap(void *device_data, struct vm_area_struct *vma) + { + struct vfio_pci_device *vdev = device_data; +@@ -1185,8 +1447,14 @@ static int vfio_pci_mmap(void *device_data, struct vm_area_struct *vma) + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + vma->vm_pgoff = (pci_resource_start(pdev, index) >> PAGE_SHIFT) + pgoff; + +- return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, +- req_len, vma->vm_page_prot); ++ /* ++ * See remap_pfn_range(), called from vfio_pci_fault() but we can't ++ * change vm_flags within the fault handler. Set them now. ++ */ ++ vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP; ++ vma->vm_ops = &vfio_pci_mmap_ops; ++ ++ return 0; + } + + static void vfio_pci_request(void *device_data, unsigned int count) +@@ -1243,6 +1511,9 @@ static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) + vdev->irq_type = VFIO_PCI_NUM_IRQS; + mutex_init(&vdev->igate); + spin_lock_init(&vdev->irqlock); ++ mutex_init(&vdev->vma_lock); ++ INIT_LIST_HEAD(&vdev->vma_list); ++ init_rwsem(&vdev->memory_lock); + + ret = vfio_add_group_dev(&pdev->dev, &vfio_pci_ops, vdev); + if (ret) { +@@ -1337,12 +1608,6 @@ static struct pci_driver vfio_pci_driver = { + .err_handler = &vfio_err_handlers, + }; + +-struct vfio_devices { +- struct vfio_device **devices; +- int cur_index; +- int max_index; +-}; +- + static int vfio_pci_get_devs(struct pci_dev *pdev, void *data) + { + struct vfio_devices *devs = data; +@@ -1364,6 +1629,39 @@ static int vfio_pci_get_devs(struct pci_dev *pdev, void *data) + return 0; + } + ++static int vfio_pci_try_zap_and_vma_lock_cb(struct pci_dev *pdev, void *data) ++{ ++ struct vfio_devices *devs = data; ++ struct vfio_device *device; ++ struct vfio_pci_device *vdev; ++ ++ if (devs->cur_index == devs->max_index) ++ return -ENOSPC; ++ ++ device = vfio_device_get_from_dev(&pdev->dev); ++ if (!device) ++ return -EINVAL; ++ ++ if (pci_dev_driver(pdev) != &vfio_pci_driver) { ++ vfio_device_put(device); ++ return -EBUSY; ++ } ++ ++ vdev = vfio_device_data(device); ++ ++ /* ++ * Locking multiple devices is prone to deadlock, runaway and ++ * unwind if we hit contention. ++ */ ++ if (!vfio_pci_zap_and_vma_lock(vdev, true)) { ++ vfio_device_put(device); ++ return -EBUSY; ++ } ++ ++ devs->devices[devs->cur_index++] = device; ++ return 0; ++} ++ + /* + * Attempt to do a bus/slot reset if there are devices affected by a reset for + * this device that are needs_reset and all of the affected devices are unused +diff --git a/drivers/vfio/pci/vfio_pci_config.c b/drivers/vfio/pci/vfio_pci_config.c +index 36bc8f104e42e..a1a26465d224c 100644 +--- a/drivers/vfio/pci/vfio_pci_config.c ++++ b/drivers/vfio/pci/vfio_pci_config.c +@@ -398,6 +398,20 @@ static inline void p_setd(struct perm_bits *p, int off, u32 virt, u32 write) + *(__le32 *)(&p->write[off]) = cpu_to_le32(write); + } + ++/* Caller should hold memory_lock semaphore */ ++bool __vfio_pci_memory_enabled(struct vfio_pci_device *vdev) ++{ ++ struct pci_dev *pdev = vdev->pdev; ++ u16 cmd = le16_to_cpu(*(__le16 *)&vdev->vconfig[PCI_COMMAND]); ++ ++ /* ++ * SR-IOV VF memory enable is handled by the MSE bit in the ++ * PF SR-IOV capability, there's therefore no need to trigger ++ * faults based on the virtual value. ++ */ ++ return pdev->is_virtfn || (cmd & PCI_COMMAND_MEMORY); ++} ++ + /* + * Restore the *real* BARs after we detect a FLR or backdoor reset. + * (backdoor = some device specific technique that we didn't catch) +@@ -558,13 +572,18 @@ static int vfio_basic_config_write(struct vfio_pci_device *vdev, int pos, + + new_cmd = le32_to_cpu(val); + ++ phys_io = !!(phys_cmd & PCI_COMMAND_IO); ++ virt_io = !!(le16_to_cpu(*virt_cmd) & PCI_COMMAND_IO); ++ new_io = !!(new_cmd & PCI_COMMAND_IO); ++ + phys_mem = !!(phys_cmd & PCI_COMMAND_MEMORY); + virt_mem = !!(le16_to_cpu(*virt_cmd) & PCI_COMMAND_MEMORY); + new_mem = !!(new_cmd & PCI_COMMAND_MEMORY); + +- phys_io = !!(phys_cmd & PCI_COMMAND_IO); +- virt_io = !!(le16_to_cpu(*virt_cmd) & PCI_COMMAND_IO); +- new_io = !!(new_cmd & PCI_COMMAND_IO); ++ if (!new_mem) ++ vfio_pci_zap_and_down_write_memory_lock(vdev); ++ else ++ down_write(&vdev->memory_lock); + + /* + * If the user is writing mem/io enable (new_mem/io) and we +@@ -581,8 +600,11 @@ static int vfio_basic_config_write(struct vfio_pci_device *vdev, int pos, + } + + count = vfio_default_config_write(vdev, pos, count, perm, offset, val); +- if (count < 0) ++ if (count < 0) { ++ if (offset == PCI_COMMAND) ++ up_write(&vdev->memory_lock); + return count; ++ } + + /* + * Save current memory/io enable bits in vconfig to allow for +@@ -593,6 +615,8 @@ static int vfio_basic_config_write(struct vfio_pci_device *vdev, int pos, + + *virt_cmd &= cpu_to_le16(~mask); + *virt_cmd |= cpu_to_le16(new_cmd & mask); ++ ++ up_write(&vdev->memory_lock); + } + + /* Emulate INTx disable */ +@@ -830,8 +854,11 @@ static int vfio_exp_config_write(struct vfio_pci_device *vdev, int pos, + pos - offset + PCI_EXP_DEVCAP, + &cap); + +- if (!ret && (cap & PCI_EXP_DEVCAP_FLR)) ++ if (!ret && (cap & PCI_EXP_DEVCAP_FLR)) { ++ vfio_pci_zap_and_down_write_memory_lock(vdev); + pci_try_reset_function(vdev->pdev); ++ up_write(&vdev->memory_lock); ++ } + } + + /* +@@ -909,8 +936,11 @@ static int vfio_af_config_write(struct vfio_pci_device *vdev, int pos, + pos - offset + PCI_AF_CAP, + &cap); + +- if (!ret && (cap & PCI_AF_CAP_FLR) && (cap & PCI_AF_CAP_TP)) ++ if (!ret && (cap & PCI_AF_CAP_FLR) && (cap & PCI_AF_CAP_TP)) { ++ vfio_pci_zap_and_down_write_memory_lock(vdev); + pci_try_reset_function(vdev->pdev); ++ up_write(&vdev->memory_lock); ++ } + } + + return count; +@@ -1708,6 +1738,15 @@ int vfio_config_init(struct vfio_pci_device *vdev) + vconfig[PCI_INTERRUPT_PIN]); + + vconfig[PCI_INTERRUPT_PIN] = 0; /* Gratuitous for good VFs */ ++ ++ /* ++ * VFs do no implement the memory enable bit of the COMMAND ++ * register therefore we'll not have it set in our initial ++ * copy of config space after pci_enable_device(). For ++ * consistency with PFs, set the virtual enable bit here. ++ */ ++ *(__le16 *)&vconfig[PCI_COMMAND] |= ++ cpu_to_le16(PCI_COMMAND_MEMORY); + } + + if (!IS_ENABLED(CONFIG_VFIO_PCI_INTX) || vdev->nointx) +diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c +index 94594dc63c417..bdfdd506bc588 100644 +--- a/drivers/vfio/pci/vfio_pci_intrs.c ++++ b/drivers/vfio/pci/vfio_pci_intrs.c +@@ -252,6 +252,7 @@ static int vfio_msi_enable(struct vfio_pci_device *vdev, int nvec, bool msix) + struct pci_dev *pdev = vdev->pdev; + unsigned int flag = msix ? PCI_IRQ_MSIX : PCI_IRQ_MSI; + int ret; ++ u16 cmd; + + if (!is_irq_none(vdev)) + return -EINVAL; +@@ -261,13 +262,16 @@ static int vfio_msi_enable(struct vfio_pci_device *vdev, int nvec, bool msix) + return -ENOMEM; + + /* return the number of supported vectors if we can't get all: */ ++ cmd = vfio_pci_memory_lock_and_enable(vdev); + ret = pci_alloc_irq_vectors(pdev, 1, nvec, flag); + if (ret < nvec) { + if (ret > 0) + pci_free_irq_vectors(pdev); ++ vfio_pci_memory_unlock_and_restore(vdev, cmd); + kfree(vdev->ctx); + return ret; + } ++ vfio_pci_memory_unlock_and_restore(vdev, cmd); + + vdev->num_ctx = nvec; + vdev->irq_type = msix ? VFIO_PCI_MSIX_IRQ_INDEX : +@@ -290,6 +294,7 @@ static int vfio_msi_set_vector_signal(struct vfio_pci_device *vdev, + struct pci_dev *pdev = vdev->pdev; + struct eventfd_ctx *trigger; + int irq, ret; ++ u16 cmd; + + if (vector < 0 || vector >= vdev->num_ctx) + return -EINVAL; +@@ -298,7 +303,11 @@ static int vfio_msi_set_vector_signal(struct vfio_pci_device *vdev, + + if (vdev->ctx[vector].trigger) { + irq_bypass_unregister_producer(&vdev->ctx[vector].producer); ++ ++ cmd = vfio_pci_memory_lock_and_enable(vdev); + free_irq(irq, vdev->ctx[vector].trigger); ++ vfio_pci_memory_unlock_and_restore(vdev, cmd); ++ + kfree(vdev->ctx[vector].name); + eventfd_ctx_put(vdev->ctx[vector].trigger); + vdev->ctx[vector].trigger = NULL; +@@ -326,6 +335,7 @@ static int vfio_msi_set_vector_signal(struct vfio_pci_device *vdev, + * such a reset it would be unsuccessful. To avoid this, restore the + * cached value of the message prior to enabling. + */ ++ cmd = vfio_pci_memory_lock_and_enable(vdev); + if (msix) { + struct msi_msg msg; + +@@ -335,6 +345,7 @@ static int vfio_msi_set_vector_signal(struct vfio_pci_device *vdev, + + ret = request_irq(irq, vfio_msihandler, 0, + vdev->ctx[vector].name, trigger); ++ vfio_pci_memory_unlock_and_restore(vdev, cmd); + if (ret) { + kfree(vdev->ctx[vector].name); + eventfd_ctx_put(trigger); +@@ -379,6 +390,7 @@ static void vfio_msi_disable(struct vfio_pci_device *vdev, bool msix) + { + struct pci_dev *pdev = vdev->pdev; + int i; ++ u16 cmd; + + for (i = 0; i < vdev->num_ctx; i++) { + vfio_virqfd_disable(&vdev->ctx[i].unmask); +@@ -387,7 +399,9 @@ static void vfio_msi_disable(struct vfio_pci_device *vdev, bool msix) + + vfio_msi_set_block(vdev, 0, vdev->num_ctx, NULL, msix); + ++ cmd = vfio_pci_memory_lock_and_enable(vdev); + pci_free_irq_vectors(pdev); ++ vfio_pci_memory_unlock_and_restore(vdev, cmd); + + /* + * Both disable paths above use pci_intx_for_msi() to clear DisINTx +diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h +index f561ac1c78a0d..f896cebb5c2c2 100644 +--- a/drivers/vfio/pci/vfio_pci_private.h ++++ b/drivers/vfio/pci/vfio_pci_private.h +@@ -63,6 +63,11 @@ struct vfio_pci_dummy_resource { + struct list_head res_next; + }; + ++struct vfio_pci_mmap_vma { ++ struct vm_area_struct *vma; ++ struct list_head vma_next; ++}; ++ + struct vfio_pci_device { + struct pci_dev *pdev; + void __iomem *barmap[PCI_STD_RESOURCE_END + 1]; +@@ -95,6 +100,9 @@ struct vfio_pci_device { + struct eventfd_ctx *err_trigger; + struct eventfd_ctx *req_trigger; + struct list_head dummy_resources_list; ++ struct mutex vma_lock; ++ struct list_head vma_list; ++ struct rw_semaphore memory_lock; + }; + + #define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX) +@@ -130,6 +138,14 @@ extern int vfio_pci_register_dev_region(struct vfio_pci_device *vdev, + unsigned int type, unsigned int subtype, + const struct vfio_pci_regops *ops, + size_t size, u32 flags, void *data); ++ ++extern bool __vfio_pci_memory_enabled(struct vfio_pci_device *vdev); ++extern void vfio_pci_zap_and_down_write_memory_lock(struct vfio_pci_device ++ *vdev); ++extern u16 vfio_pci_memory_lock_and_enable(struct vfio_pci_device *vdev); ++extern void vfio_pci_memory_unlock_and_restore(struct vfio_pci_device *vdev, ++ u16 cmd); ++ + #ifdef CONFIG_VFIO_PCI_IGD + extern int vfio_pci_igd_init(struct vfio_pci_device *vdev); + #else +diff --git a/drivers/vfio/pci/vfio_pci_rdwr.c b/drivers/vfio/pci/vfio_pci_rdwr.c +index 357243d76f108..6445461a56013 100644 +--- a/drivers/vfio/pci/vfio_pci_rdwr.c ++++ b/drivers/vfio/pci/vfio_pci_rdwr.c +@@ -122,6 +122,7 @@ ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf, + size_t x_start = 0, x_end = 0; + resource_size_t end; + void __iomem *io; ++ struct resource *res = &vdev->pdev->resource[bar]; + ssize_t done; + + if (pci_resource_start(pdev, bar)) +@@ -137,6 +138,14 @@ ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf, + + count = min(count, (size_t)(end - pos)); + ++ if (res->flags & IORESOURCE_MEM) { ++ down_read(&vdev->memory_lock); ++ if (!__vfio_pci_memory_enabled(vdev)) { ++ up_read(&vdev->memory_lock); ++ return -EIO; ++ } ++ } ++ + if (bar == PCI_ROM_RESOURCE) { + /* + * The ROM can fill less space than the BAR, so we start the +@@ -144,20 +153,21 @@ ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf, + * filling large ROM BARs much faster. + */ + io = pci_map_rom(pdev, &x_start); +- if (!io) +- return -ENOMEM; ++ if (!io) { ++ done = -ENOMEM; ++ goto out; ++ } + x_end = end; + } else if (!vdev->barmap[bar]) { +- int ret; +- +- ret = pci_request_selected_regions(pdev, 1 << bar, "vfio"); +- if (ret) +- return ret; ++ done = pci_request_selected_regions(pdev, 1 << bar, "vfio"); ++ if (done) ++ goto out; + + io = pci_iomap(pdev, bar, 0); + if (!io) { + pci_release_selected_regions(pdev, 1 << bar); +- return -ENOMEM; ++ done = -ENOMEM; ++ goto out; + } + + vdev->barmap[bar] = io; +@@ -176,6 +186,9 @@ ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf, + + if (bar == PCI_ROM_RESOURCE) + pci_unmap_rom(pdev, io); ++out: ++ if (res->flags & IORESOURCE_MEM) ++ up_read(&vdev->memory_lock); + + return done; + } +diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c +index f22425501bc16..9c8ed9d7f9aa5 100644 +--- a/drivers/vfio/vfio_iommu_type1.c ++++ b/drivers/vfio/vfio_iommu_type1.c +@@ -336,6 +336,32 @@ static int put_pfn(unsigned long pfn, int prot) + return 0; + } + ++static int follow_fault_pfn(struct vm_area_struct *vma, struct mm_struct *mm, ++ unsigned long vaddr, unsigned long *pfn, ++ bool write_fault) ++{ ++ int ret; ++ ++ ret = follow_pfn(vma, vaddr, pfn); ++ if (ret) { ++ bool unlocked = false; ++ ++ ret = fixup_user_fault(NULL, mm, vaddr, ++ FAULT_FLAG_REMOTE | ++ (write_fault ? FAULT_FLAG_WRITE : 0), ++ &unlocked); ++ if (unlocked) ++ return -EAGAIN; ++ ++ if (ret) ++ return ret; ++ ++ ret = follow_pfn(vma, vaddr, pfn); ++ } ++ ++ return ret; ++} ++ + static int vaddr_get_pfn(struct mm_struct *mm, unsigned long vaddr, + int prot, unsigned long *pfn) + { +@@ -375,12 +401,16 @@ static int vaddr_get_pfn(struct mm_struct *mm, unsigned long vaddr, + + down_read(&mm->mmap_sem); + ++retry: + vma = find_vma_intersection(mm, vaddr, vaddr + 1); + + if (vma && vma->vm_flags & VM_PFNMAP) { +- if (!follow_pfn(vma, vaddr, pfn) && +- is_invalid_reserved_pfn(*pfn)) +- ret = 0; ++ ret = follow_fault_pfn(vma, mm, vaddr, pfn, prot & IOMMU_WRITE); ++ if (ret == -EAGAIN) ++ goto retry; ++ ++ if (!ret && !is_invalid_reserved_pfn(*pfn)) ++ ret = -EFAULT; + } + + up_read(&mm->mmap_sem); +diff --git a/net/core/dev.c b/net/core/dev.c +index 7ec549e481e39..d101f95a47fbc 100644 +--- a/net/core/dev.c ++++ b/net/core/dev.c +@@ -5532,12 +5532,13 @@ void netif_napi_add(struct net_device *dev, struct napi_struct *napi, + pr_err_once("netif_napi_add() called with weight %d on device %s\n", + weight, dev->name); + napi->weight = weight; +- list_add(&napi->dev_list, &dev->napi_list); + napi->dev = dev; + #ifdef CONFIG_NETPOLL + napi->poll_owner = -1; + #endif + set_bit(NAPI_STATE_SCHED, &napi->state); ++ set_bit(NAPI_STATE_NPSVC, &napi->state); ++ list_add_rcu(&napi->dev_list, &dev->napi_list); + napi_hash_add(napi); + } + EXPORT_SYMBOL(netif_napi_add); +diff --git a/net/core/netpoll.c b/net/core/netpoll.c +index abab3753a9e0e..0b247f7cd5833 100644 +--- a/net/core/netpoll.c ++++ b/net/core/netpoll.c +@@ -179,7 +179,7 @@ static void poll_napi(struct net_device *dev) + struct napi_struct *napi; + int cpu = smp_processor_id(); + +- list_for_each_entry(napi, &dev->napi_list, dev_list) { ++ list_for_each_entry_rcu(napi, &dev->napi_list, dev_list) { + if (cmpxchg(&napi->poll_owner, -1, cpu) == -1) { + poll_one_napi(napi); + smp_store_release(&napi->poll_owner, -1); +diff --git a/net/netlabel/netlabel_domainhash.c b/net/netlabel/netlabel_domainhash.c +index 41d0e95d171e1..b1a1718495f34 100644 +--- a/net/netlabel/netlabel_domainhash.c ++++ b/net/netlabel/netlabel_domainhash.c +@@ -99,6 +99,7 @@ static void netlbl_domhsh_free_entry(struct rcu_head *entry) + kfree(netlbl_domhsh_addr6_entry(iter6)); + } + #endif /* IPv6 */ ++ kfree(ptr->def.addrsel); + } + kfree(ptr->domain); + kfree(ptr); +@@ -550,6 +551,8 @@ int netlbl_domhsh_add(struct netlbl_dom_map *entry, + goto add_return; + } + #endif /* IPv6 */ ++ /* cleanup the new entry since we've moved everything over */ ++ netlbl_domhsh_free_entry(&entry->rcu); + } else + ret_val = -EINVAL; + +@@ -593,6 +596,12 @@ int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry, + { + int ret_val = 0; + struct audit_buffer *audit_buf; ++ struct netlbl_af4list *iter4; ++ struct netlbl_domaddr4_map *map4; ++#if IS_ENABLED(CONFIG_IPV6) ++ struct netlbl_af6list *iter6; ++ struct netlbl_domaddr6_map *map6; ++#endif /* IPv6 */ + + if (entry == NULL) + return -ENOENT; +@@ -610,6 +619,9 @@ int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry, + ret_val = -ENOENT; + spin_unlock(&netlbl_domhsh_lock); + ++ if (ret_val) ++ return ret_val; ++ + audit_buf = netlbl_audit_start_common(AUDIT_MAC_MAP_DEL, audit_info); + if (audit_buf != NULL) { + audit_log_format(audit_buf, +@@ -619,40 +631,29 @@ int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry, + audit_log_end(audit_buf); + } + +- if (ret_val == 0) { +- struct netlbl_af4list *iter4; +- struct netlbl_domaddr4_map *map4; +-#if IS_ENABLED(CONFIG_IPV6) +- struct netlbl_af6list *iter6; +- struct netlbl_domaddr6_map *map6; +-#endif /* IPv6 */ +- +- switch (entry->def.type) { +- case NETLBL_NLTYPE_ADDRSELECT: +- netlbl_af4list_foreach_rcu(iter4, +- &entry->def.addrsel->list4) { +- map4 = netlbl_domhsh_addr4_entry(iter4); +- cipso_v4_doi_putdef(map4->def.cipso); +- } ++ switch (entry->def.type) { ++ case NETLBL_NLTYPE_ADDRSELECT: ++ netlbl_af4list_foreach_rcu(iter4, &entry->def.addrsel->list4) { ++ map4 = netlbl_domhsh_addr4_entry(iter4); ++ cipso_v4_doi_putdef(map4->def.cipso); ++ } + #if IS_ENABLED(CONFIG_IPV6) +- netlbl_af6list_foreach_rcu(iter6, +- &entry->def.addrsel->list6) { +- map6 = netlbl_domhsh_addr6_entry(iter6); +- calipso_doi_putdef(map6->def.calipso); +- } ++ netlbl_af6list_foreach_rcu(iter6, &entry->def.addrsel->list6) { ++ map6 = netlbl_domhsh_addr6_entry(iter6); ++ calipso_doi_putdef(map6->def.calipso); ++ } + #endif /* IPv6 */ +- break; +- case NETLBL_NLTYPE_CIPSOV4: +- cipso_v4_doi_putdef(entry->def.cipso); +- break; ++ break; ++ case NETLBL_NLTYPE_CIPSOV4: ++ cipso_v4_doi_putdef(entry->def.cipso); ++ break; + #if IS_ENABLED(CONFIG_IPV6) +- case NETLBL_NLTYPE_CALIPSO: +- calipso_doi_putdef(entry->def.calipso); +- break; ++ case NETLBL_NLTYPE_CALIPSO: ++ calipso_doi_putdef(entry->def.calipso); ++ break; + #endif /* IPv6 */ +- } +- call_rcu(&entry->rcu, netlbl_domhsh_free_entry); + } ++ call_rcu(&entry->rcu, netlbl_domhsh_free_entry); + + return ret_val; + } +diff --git a/net/sctp/socket.c b/net/sctp/socket.c +index 442780515760e..1f154276a681f 100644 +--- a/net/sctp/socket.c ++++ b/net/sctp/socket.c +@@ -7086,8 +7086,6 @@ static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr) + + pr_debug("%s: begins, snum:%d\n", __func__, snum); + +- local_bh_disable(); +- + if (snum == 0) { + /* Search for an available port. */ + int low, high, remaining, index; +@@ -7106,20 +7104,21 @@ static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr) + continue; + index = sctp_phashfn(sock_net(sk), rover); + head = &sctp_port_hashtable[index]; +- spin_lock(&head->lock); ++ spin_lock_bh(&head->lock); + sctp_for_each_hentry(pp, &head->chain) + if ((pp->port == rover) && + net_eq(sock_net(sk), pp->net)) + goto next; + break; + next: +- spin_unlock(&head->lock); ++ spin_unlock_bh(&head->lock); ++ cond_resched(); + } while (--remaining > 0); + + /* Exhausted local port range during search? */ + ret = 1; + if (remaining <= 0) +- goto fail; ++ return ret; + + /* OK, here is the one we will use. HEAD (the port + * hash table list entry) is non-NULL and we hold it's +@@ -7134,7 +7133,7 @@ static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr) + * port iterator, pp being NULL. + */ + head = &sctp_port_hashtable[sctp_phashfn(sock_net(sk), snum)]; +- spin_lock(&head->lock); ++ spin_lock_bh(&head->lock); + sctp_for_each_hentry(pp, &head->chain) { + if ((pp->port == snum) && net_eq(pp->net, sock_net(sk))) + goto pp_found; +@@ -7218,10 +7217,7 @@ success: + ret = 0; + + fail_unlock: +- spin_unlock(&head->lock); +- +-fail: +- local_bh_enable(); ++ spin_unlock_bh(&head->lock); + return ret; + } + +diff --git a/net/tipc/socket.c b/net/tipc/socket.c +index d9ec6335c7dcf..cbec2242f79ab 100644 +--- a/net/tipc/socket.c ++++ b/net/tipc/socket.c +@@ -2126,18 +2126,21 @@ static int tipc_shutdown(struct socket *sock, int how) + lock_sock(sk); + + __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN); +- sk->sk_shutdown = SEND_SHUTDOWN; ++ if (tipc_sk_type_connectionless(sk)) ++ sk->sk_shutdown = SHUTDOWN_MASK; ++ else ++ sk->sk_shutdown = SEND_SHUTDOWN; + + if (sk->sk_state == TIPC_DISCONNECTING) { + /* Discard any unreceived messages */ + __skb_queue_purge(&sk->sk_receive_queue); + +- /* Wake up anyone sleeping in poll */ +- sk->sk_state_change(sk); + res = 0; + } else { + res = -ENOTCONN; + } ++ /* Wake up anyone sleeping in poll. */ ++ sk->sk_state_change(sk); + + release_sock(sk); + return res; +diff --git a/sound/firewire/tascam/tascam.c b/sound/firewire/tascam/tascam.c +index d3fdc463a884e..1e61cdce28952 100644 +--- a/sound/firewire/tascam/tascam.c ++++ b/sound/firewire/tascam/tascam.c +@@ -225,11 +225,39 @@ static void snd_tscm_remove(struct fw_unit *unit) + } + + static const struct ieee1394_device_id snd_tscm_id_table[] = { ++ // Tascam, FW-1884. + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | +- IEEE1394_MATCH_SPECIFIER_ID, ++ IEEE1394_MATCH_SPECIFIER_ID | ++ IEEE1394_MATCH_VERSION, + .vendor_id = 0x00022e, + .specifier_id = 0x00022e, ++ .version = 0x800000, ++ }, ++ // Tascam, FE-8 (.version = 0x800001) ++ // This kernel module doesn't support FE-8 because the most of features ++ // can be implemented in userspace without any specific support of this ++ // module. ++ // ++ // .version = 0x800002 is unknown. ++ // ++ // Tascam, FW-1082. ++ { ++ .match_flags = IEEE1394_MATCH_VENDOR_ID | ++ IEEE1394_MATCH_SPECIFIER_ID | ++ IEEE1394_MATCH_VERSION, ++ .vendor_id = 0x00022e, ++ .specifier_id = 0x00022e, ++ .version = 0x800003, ++ }, ++ // Tascam, FW-1804. ++ { ++ .match_flags = IEEE1394_MATCH_VENDOR_ID | ++ IEEE1394_MATCH_SPECIFIER_ID | ++ IEEE1394_MATCH_VERSION, ++ .vendor_id = 0x00022e, ++ .specifier_id = 0x00022e, ++ .version = 0x800004, + }, + /* FE-08 requires reverse-engineering because it just has faders. */ + {}
