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![Theodore Ts'o](https://secure.gravatar.com/avatar/fe4605d663cd4896cd8cc9dd778903dd.jpg?s=96&d=mm)
Theodore Ts'o committed 31343d27f18
ext4: check to make sure the rename(2)'s destination is not freed commit b50282f3241acee880514212d88b6049fb5039c8 upstream. If the destination of the rename(2) system call exists, the inode's link count (i_nlinks) must be non-zero. If it is, the inode can end up on the orphan list prematurely, leading to all sorts of hilarity, including a use-after-free. https://bugzilla.kernel.org/show_bug.cgi?id=200931 Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reported-by: Wen Xu <wen.xu@gatech.edu> Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>