Le Mercredi, Octobre 14, 2020 16:16 CEST, Greg Gallagher <[email protected]> a écrit:
> On Wed, Oct 14, 2020 at 5:37 AM Jan Kiszka <[email protected]> wrote: > > > > On 14.10.20 10:43, François Legal via Xenomai wrote: > > > Anybody can help on this ? > > > > > > > I'm unfortunately not familiar with the armv7 details of copy-from-user, > > not too speak of how spectre contributed to it. Greg, Philippe, did you > > come across this already? > > > > Jan > > > I'll take a look tonight but I haven't hit this in my testing. This > was found on 4.4? Have you tried the 4.19 kernels? > > -Greg So I tried the same case on 4.19.121, with the same result, and I guess for the same reason. Could anybody explain why, on ARMv7, we need to copy the message header at the syscall entry, and not let the xxxmsg routine do it on its own ? Also, I could not find how those COBALT_SYSCALL32emu logic work. Can anybody point me to some documentation ? Thanks François
