David Wysochanski <dwysocha@xxxxxxxxxx> wrote: > > (4) fscache_enable/disable_cookie() have been removed. > > > > Call fscache_use_cookie() and fscache_unuse_cookie() when a file is > > opened or closed to prevent a cache file from being culled and to keep > > resources to hand that are needed to do I/O. > > > > Unuse the cookie when a file is opened for writing. This is gated by > > the NFS_INO_FSCACHE flag on the nfs_inode. > > > > A better way might be to invalidate it with FSCACHE_INVAL_DIO_WRITE > > which will keep it unused until all open files are closed. > > > > It looks like the comment doesn't match what was actually done inside > nfs_fscache_open_file(). Is the code right and the comment just out of date? The comment is out of date. NFS_INO_FSCACHE isn't used now. > I'm getting that kasan UAF firing periodically in this code path, and so it > looks related to this change,though I don't have great info on it so far and > it's hard to reproduce. Can you copy the kasan UAF text into a reply? David
