Merge branch 'akpm' (patches from Andrew)

Merge updates from Andrew Morton:

 - a few hot fixes

 - ocfs2 updates

 - almost all of -mm (slab-generic, slab, slub, kmemleak, kasan,
   cleanups, debug, pagecache, memcg, gup, pagemap, memory-hotplug,
   sparsemem, vmalloc, initialization, z3fold, compaction, mempolicy,
   oom-kill, hugetlb, migration, thp, mmap, madvise, shmem, zswap,
   zsmalloc)

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (132 commits)
  mm/zsmalloc.c: fix a -Wunused-function warning
  zswap: do not map same object twice
  zswap: use movable memory if zpool support allocate movable memory
  zpool: add malloc_support_movable to zpool_driver
  shmem: fix obsolete comment in shmem_getpage_gfp()
  mm/madvise: reduce code duplication in error handling paths
  mm: mmap: increase sockets maximum memory size pgoff for 32bits
  mm/mmap.c: refine find_vma_prev() with rb_last()
  riscv: make mmap allocation top-down by default
  mips: use generic mmap top-down layout and brk randomization
  mips: replace arch specific way to determine 32bit task with generic version
  mips: adjust brk randomization offset to fit generic version
  mips: use STACK_TOP when computing mmap base address
  mips: properly account for stack randomization and stack guard gap
  arm: use generic mmap top-down layout and brk randomization
  arm: use STACK_TOP when computing mmap base address
  arm: properly account for stack randomization and stack guard gap
  arm64, mm: make randomization selected by generic topdown mmap layout
  arm64, mm: move generic mmap layout functions to mm
  arm64: consider stack randomization for mmap base only when necessary
  ...

1 files changed, 6 insertions, 6 deletions

diff --git a/mm/mmap.c b/mm/mmap.c
index 6bc21fca20bc..f1e8c7f93e04 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1358,6 +1358,9 @@ static inline u64 file_mmap_size_max(struct file *file, struct inode *inode)
 	if (S_ISBLK(inode->i_mode))
 		return MAX_LFS_FILESIZE;
 
+	if (S_ISSOCK(inode->i_mode))
+		return MAX_LFS_FILESIZE;
+
 	/* Special "we do even unsigned file positions" case */
 	if (file->f_mode & FMODE_UNSIGNED_OFFSET)
 		return 0;
@@ -2274,12 +2277,9 @@ find_vma_prev(struct mm_struct *mm, unsigned long addr,
 	if (vma) {
 		*pprev = vma->vm_prev;
 	} else {
-		struct rb_node *rb_node = mm->mm_rb.rb_node;
-		*pprev = NULL;
-		while (rb_node) {
-			*pprev = rb_entry(rb_node, struct vm_area_struct, vm_rb);
-			rb_node = rb_node->rb_right;
-		}
+		struct rb_node *rb_node = rb_last(&mm->mm_rb);
+
+		*pprev = rb_node ? rb_entry(rb_node, struct vm_area_struct, vm_rb) : NULL;
 	}
 	return vma;
 }