On Wed, 2023-07-19 at 08:53 -0500, Haitao Huang wrote: > Hi Dave and Kai > On Tue, 18 Jul 2023 19:21:54 -0500, Dave Hansen <dave.hansen@xxxxxxxxx> > wrote: > > > On 7/18/23 17:14, Huang, Kai wrote: > > > Also perhaps the patch title is too vague. Adding more information > > > doesn't hurt > > > I think, e.g., mentioning it is a fix for NULL pointer dereference in > > > the EAUG > > > flow. > > > > Yeah, let's say something like: > > > > x86/sgx: Resolve SECS reclaim vs. page fault race > > > The patch is not to resolve SECS vs #PF race though the race is a > necessary condition to cause the NULL pointer. The same condition does not > cause NULL pointer in the ELDU path of #PF, only in EAUG path of #PF. > > And the issue really is the NULL pointer not checked and fix was to reuse > the same code to reload SECS in ELDU code path for EAUG code path > > > How about this: > > x86/sgx: Reload reclaimed SECS for EAUG on #PF > > or > > x86/sgx: Fix a NULL pointer to SECS used for EAUG on #PF > Perhaps you can add "EAUG" part to what Dave suggested? x86/sgx: Resolves SECS reclaim vs. page fault race on EAUG (assuming Dave is fine with this :-))
