From cd857dd6bc2ae9ecea14e75a34e8a8fdc158e307 Mon Sep 17 00:00:00 2001 From: Liu Bo Date: Sun, 8 Jun 2014 19:04:13 +0800 Subject: [PATCH] Btrfs: use right type to get real comparison We want to make sure the point is still within the extent item, not to verify the memory it's pointing to. Signed-off-by: Liu Bo Signed-off-by: Chris Mason --- fs/btrfs/backref.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index 84d0912eecb2..00f9d9f911ca 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -1428,7 +1428,7 @@ static int __get_extent_inline_ref(unsigned long *ptr, struct extent_buffer *eb, *out_eiref = (struct btrfs_extent_inline_ref *)(ei + 1); } *ptr = (unsigned long)*out_eiref; - if ((void *)*ptr >= (void *)ei + item_size) + if ((unsigned long)(*ptr) >= (unsigned long)ei + item_size) return -ENOENT; } -- 2.20.1