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authorMatthew Wilcox <willy@linux.intel.com>2016-05-20 17:02:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-20 17:58:30 -0700
commit29e0967c2f66771f654cef7168c90a53737abcdf (patch)
tree95e021c42ea084842b033b590d9843fb08efb4eb
parent3b8c00f68405e9c037a6d8ae0d5d9da7f8a34e6a (diff)
radix-tree: fix deleting a multi-order entry through an alias
If we deleted an entry through an index which looked up a sibling pointer, we'd end up zeroing out the wrong slots in the node. Use get_slot_offset() to find the right slot. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com> Cc: Jan Kara <jack@suse.com> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--lib/radix-tree.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index c0366d1d2613..b3364b9ecc83 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -1558,7 +1558,7 @@ void *radix_tree_delete_item(struct radix_tree_root *root,
return entry;
}
- offset = index & RADIX_TREE_MAP_MASK;
+ offset = get_slot_offset(node, slot);
/*
* Clear all tags associated with the item to be deleted.