On Fri, 16 Jun 2023, Lee Jones wrote: > On Wed, 14 Jun 2023, Lee Jones wrote: > > > set_pgd() expects to be passed whole pages to operate on, whereas > > trampoline_pgd_entry is, as the name suggests, an entry. The > > ramifications for using set_pgd() here are that the following thread of > > execution will not only place the suggested value into the > > trampoline_pgd_entry (8-Byte globally stored [.bss]) variable, PTI will > > also attempt to replicate that value into the non-existent neighboring > > user page (located +4k away), leading to the corruption of other global > > [.bss] stored variables. > > > > Suggested-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> > > Signed-off-by: Lee Jones <lee@xxxxxxxxxx> > > --- > > arch/x86/mm/kaslr.c | 8 ++++---- > > 1 file changed, 4 insertions(+), 4 deletions(-) > > Is there any more you need from me at this point? > > Would you like me to resubmit with the Fixes: tag applied, or is > someone happy to apply it on merge? Superstar, thanks Dave. -- Lee Jones [李琼斯]
