On Sun, Jan 08, 2017 at 09:48:44AM -0500, Mimi Zohar wrote: > IMA takes the i_rwsem (fomerly i_mutex) before reading the file to > synchronize calculating the file hash and validating the file's > hash/signature stored as security.ima xattr
Well, it shouldn't do that. In the I/O path i_rwsem is up to the fs to use. Various other file systems also take it internally for reads, although mostly only for direct I/O. So the answer here is that ima needs to stop playing with i_rwsem.
