On Thu, 6 Feb 2025 at 19:21, Dave Hansen <dave.hansen@xxxxxxxxx> wrote: > > On 2/4/25 02:01, Dmitry Vyukov wrote: > >> But this updated PKRU value is also pushed onto the sigframe, which > >> means the register value restored from sigcontext will be different from > >> the user-defined one, which is unexpected. Fix that by overwriting the > >> PKRU value on the sigframe with the original, user-defined PKRU. > > > > This unfortunatly seems to be broken for rseq user-space writes. > > Hi Dmitry, > > Are you saying that Aruna's patch caused a regression in the rseq code? > Or that the rseq code has a separate but similar issue to the one that > Aruna's patch fixed? No, no regression. Just another issue for real PKEY uses.
