On Wed, Jan 10, 2018 at 06:02:45PM -0800, Kees Cook wrote: > The ext4 symlink pathnames, stored in struct ext4_inode_info.i_data > and therefore contained in the ext4_inode_cache slab cache, need > to be copied to/from userspace.
Symlink operations to/from userspace aren't common or in the hot path,
and when they are in i_data, limited to at most 60 bytes. Is it worth
it to copy through a bounce buffer so as to disallow any usercopies
into struct ext4_inode_info?
- Ted
