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btrfs: use aligned range for locking in extent_fiemap()

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The @end parameter for all extent io tree helpers is inclusive, but
the call site in extent_fiemap() is passing an exclusive end into
btrfs_lock_extent(), which will step into the next block unexpectedly.

Pass the inclusive end into btrfs_lock_extent() and
btrfs_unlock_extent().

Fixes: ac3c0d36a2 ("btrfs: make fiemap more efficient and accurate reporting extent sharedness")
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2026-07-28 19:34:09 +09:30 committed by David Sterba
parent db4b9eefc8
commit 681e073614
1 changed files with 2 additions and 2 deletions
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4
fs/btrfs/fiemap.c
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@ -660,7 +660,7 @@ static int extent_fiemap(struct btrfs_inode *inode,
range_end = round_up(start + len, sectorsize);
prev_extent_end = range_start;
btrfs_lock_extent(&inode->io_tree, range_start, range_end, &cached_state);
btrfs_lock_extent(&inode->io_tree, range_start, range_end - 1, &cached_state);
ret = fiemap_find_last_extent_offset(inode, path, &last_extent_end);
if (ret < 0)
@ -840,7 +840,7 @@ static int extent_fiemap(struct btrfs_inode *inode,
}
out_unlock:
btrfs_unlock_extent(&inode->io_tree, range_start, range_end, &cached_state);
btrfs_unlock_extent(&inode->io_tree, range_start, range_end - 1, &cached_state);
if (ret == BTRFS_FIEMAP_FLUSH_CACHE) {
btrfs_release_path(path);