Merge tag 'for-5.12-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:
 "More regression fixes and stabilization.

  Regressions:

   - zoned mode
      - count zone sizes in wider int types
      - fix space accounting for read-only block groups

   - subpage: fix page tail zeroing

  Fixes:

   - fix spurious warning when remounting with free space tree

   - fix warning when creating a directory with smack enabled

   - ioctl checks for qgroup inheritance when creating a snapshot

   - qgroup
      - fix missing unlock on error path in zero range
      - fix amount of released reservation on error
      - fix flushing from unsafe context with open transaction,
        potentially deadlocking

   - minor build warning fixes"

* tag 'for-5.12-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: zoned: do not account freed region of read-only block group as zone_unusable
  btrfs: zoned: use sector_t for zone sectors
  btrfs: subpage: fix the false data csum mismatch error
  btrfs: fix warning when creating a directory with smack enabled
  btrfs: don't flush from btrfs_delayed_inode_reserve_metadata
  btrfs: export and rename qgroup_reserve_meta
  btrfs: free correct amount of space in btrfs_delayed_inode_reserve_metadata
  btrfs: fix spurious free_space_tree remount warning
  btrfs: validate qgroup inherit for SNAP_CREATE_V2 ioctl
  btrfs: unlock extents in btrfs_zero_range in case of quota reservation errors
  btrfs: ref-verify: use 'inline void' keyword ordering

1 files changed, 16 insertions, 5 deletions

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 4dfb3ead1175..4671c99d468d 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3008,12 +3008,23 @@ readpage_ok:
 		if (likely(uptodate)) {
 			loff_t i_size = i_size_read(inode);
 			pgoff_t end_index = i_size >> PAGE_SHIFT;
-			unsigned off;
 
-			/* Zero out the end if this page straddles i_size */
-			off = offset_in_page(i_size);
-			if (page->index == end_index && off)
-				zero_user_segment(page, off, PAGE_SIZE);
+			/*
+			 * Zero out the remaining part if this range straddles
+			 * i_size.
+			 *
+			 * Here we should only zero the range inside the bvec,
+			 * not touch anything else.
+			 *
+			 * NOTE: i_size is exclusive while end is inclusive.
+			 */
+			if (page->index == end_index && i_size <= end) {
+				u32 zero_start = max(offset_in_page(i_size),
+						     offset_in_page(end));
+
+				zero_user_segment(page, zero_start,
+						  offset_in_page(end) + 1);
+			}
 		}
 		ASSERT(bio_offset + len > bio_offset);
 		bio_offset += len;