Merge tag 'v6.11' into for-6.12/block

Merge in 6.11 final to get the fix for preventing deadlocks on an
elevator switch, as there's a fixup for that patch.

* tag 'v6.11': (1788 commits)
  Linux 6.11
  Revert "KVM: VMX: Always honor guest PAT on CPUs that support self-snoop"
  pinctrl: pinctrl-cy8c95x0: Fix regcache
  cifs: Fix signature miscalculation
  mm: avoid leaving partial pfn mappings around in error case
  drm/xe/client: add missing bo locking in show_meminfo()
  drm/xe/client: fix deadlock in show_meminfo()
  drm/xe/oa: Enable Xe2+ PES disaggregation
  drm/xe/display: fix compat IS_DISPLAY_STEP() range end
  drm/xe: Fix access_ok check in user_fence_create
  drm/xe: Fix possible UAF in guc_exec_queue_process_msg
  drm/xe: Remove fence check from send_tlb_invalidation
  drm/xe/gt: Remove double include
  net: netfilter: move nf flowtable bpf initialization in nf_flow_table_module_init()
  PCI: Fix potential deadlock in pcim_intx()
  workqueue: Clear worker->pool in the worker thread context
  net: tighten bad gso csum offset check in virtio_net_hdr
  netlink: specs: mptcp: fix port endianness
  net: dpaa: Pad packets to ETH_ZLEN
  mptcp: pm: Fix uaf in __timer_delete_sync
  ...

1 files changed, 38 insertions, 22 deletions

diff --git a/mm/memory.c b/mm/memory.c
index 34f8402d2046..ebfc9768f801 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2632,11 +2632,7 @@ static inline int remap_p4d_range(struct mm_struct *mm, pgd_t *pgd,
 	return 0;
 }
 
-/*
- * Variant of remap_pfn_range that does not call track_pfn_remap.  The caller
- * must have pre-validated the caching bits of the pgprot_t.
- */
-int remap_pfn_range_notrack(struct vm_area_struct *vma, unsigned long addr,
+static int remap_pfn_range_internal(struct vm_area_struct *vma, unsigned long addr,
 		unsigned long pfn, unsigned long size, pgprot_t prot)
 {
 	pgd_t *pgd;
@@ -2689,6 +2685,27 @@ int remap_pfn_range_notrack(struct vm_area_struct *vma, unsigned long addr,
 	return 0;
 }
 
+/*
+ * Variant of remap_pfn_range that does not call track_pfn_remap.  The caller
+ * must have pre-validated the caching bits of the pgprot_t.
+ */
+int remap_pfn_range_notrack(struct vm_area_struct *vma, unsigned long addr,
+		unsigned long pfn, unsigned long size, pgprot_t prot)
+{
+	int error = remap_pfn_range_internal(vma, addr, pfn, size, prot);
+
+	if (!error)
+		return 0;
+
+	/*
+	 * A partial pfn range mapping is dangerous: it does not
+	 * maintain page reference counts, and callers may free
+	 * pages due to the error. So zap it early.
+	 */
+	zap_page_range_single(vma, addr, size, NULL);
+	return error;
+}
+
 /**
  * remap_pfn_range - remap kernel memory to userspace
  * @vma: user vma to map to
@@ -5295,7 +5312,7 @@ static vm_fault_t do_numa_page(struct vm_fault *vmf)
 
 	if (unlikely(!pte_same(old_pte, vmf->orig_pte))) {
 		pte_unmap_unlock(vmf->pte, vmf->ptl);
-		goto out;
+		return 0;
 	}
 
 	pte = pte_modify(old_pte, vma->vm_page_prot);
@@ -5358,23 +5375,19 @@ static vm_fault_t do_numa_page(struct vm_fault *vmf)
 	if (!migrate_misplaced_folio(folio, vma, target_nid)) {
 		nid = target_nid;
 		flags |= TNF_MIGRATED;
-	} else {
-		flags |= TNF_MIGRATE_FAIL;
-		vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd,
-					       vmf->address, &vmf->ptl);
-		if (unlikely(!vmf->pte))
-			goto out;
-		if (unlikely(!pte_same(ptep_get(vmf->pte), vmf->orig_pte))) {
-			pte_unmap_unlock(vmf->pte, vmf->ptl);
-			goto out;
-		}
-		goto out_map;
+		task_numa_fault(last_cpupid, nid, nr_pages, flags);
+		return 0;
 	}
 
-out:
-	if (nid != NUMA_NO_NODE)
-		task_numa_fault(last_cpupid, nid, nr_pages, flags);
-	return 0;
+	flags |= TNF_MIGRATE_FAIL;
+	vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd,
+				       vmf->address, &vmf->ptl);
+	if (unlikely(!vmf->pte))
+		return 0;
+	if (unlikely(!pte_same(ptep_get(vmf->pte), vmf->orig_pte))) {
+		pte_unmap_unlock(vmf->pte, vmf->ptl);
+		return 0;
+	}
 out_map:
 	/*
 	 * Make it present again, depending on how arch implements
@@ -5387,7 +5400,10 @@ out_map:
 		numa_rebuild_single_mapping(vmf, vma, vmf->address, vmf->pte,
 					    writable);
 	pte_unmap_unlock(vmf->pte, vmf->ptl);
-	goto out;
+
+	if (nid != NUMA_NO_NODE)
+		task_numa_fault(last_cpupid, nid, nr_pages, flags);
+	return 0;
 }
 
 static inline vm_fault_t create_huge_pmd(struct vm_fault *vmf)