On Thu, 23 Mar 2023 14:50:38 +0800 Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx> wrote: > > > 在 2023/3/23 7:03, Andrew Morton 写道: > > On Wed, 22 Mar 2023 11:11:09 +0000 Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx> wrote: > > > >> unshare copies data from source to destination. But if the source is > >> HOLE or UNWRITTEN extents, we should zero the destination, otherwise the > >> result will be unexpectable. > > > > Please provide much more detail on the user-visible effects of the bug. > > For example, are we leaking kernel memory contents to userspace? > > This fixes fail of generic/649. OK, but this doesn't really help. I'm trying to determine whether this fix should be backported into -stable kernels and whether it should be fast-tracked into Linus's current -rc tree. But to determine this I (and others) need to know what effect the bug has upon our users.
