Messages in this thread | | | From | Lai Jiangshan <> | Date | Wed, 27 Apr 2022 16:27:38 +0800 | Subject | Re: [PATCH V2] x86/sev: Mark the code returning to user space as syscall gap |
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On Tue, Apr 12, 2022 at 8:48 PM Lai Jiangshan <jiangshanlai@gmail.com> wrote: > > From: Lai Jiangshan <jiangshan.ljs@antgroup.com> > > When returning to user space, the %rsp is user controlled value. > > If it is SNP-guest and the hypervisor decides to mess with the code-page > for this path while a CPU is executing it. This will cause a #VC on > that CPU and that could hit in the syscall return path and mislead > the #VC handler. > > So make ip_within_syscall_gap() return true in this case. > > Cc: Joerg Roedel <jroedel@suse.de> > Signed-off-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
Hello
Ping.
Thanks Lai
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