[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen master] x86/shim: zap runstate and time area handles during shutdown
commit 826da6e30cf37a22b3f32dba33477856125df91b Author: Jan Beulich <jbeulich@xxxxxxxx> AuthorDate: Mon Oct 2 17:11:19 2023 +0200 Commit: Julien Grall <jgrall@xxxxxxxxxx> CommitDate: Thu Oct 5 14:08:26 2023 +0100 x86/shim: zap runstate and time area handles during shutdown While likely the guest would just re-register the same areas after a possible resume, let's not take this for granted and avoid the risk of otherwise corrupting guest memory. Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx> Release-acked-by: Henry Wang <Henry.Wang@xxxxxxx> --- xen/arch/x86/pv/shim.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/xen/arch/x86/pv/shim.c b/xen/arch/x86/pv/shim.c index ca0e639db3..7e4bacf7ae 100644 --- a/xen/arch/x86/pv/shim.c +++ b/xen/arch/x86/pv/shim.c @@ -385,6 +385,10 @@ int pv_shim_shutdown(uint8_t reason) /* Unmap guest vcpu_info pages. */ unmap_vcpu_info(v); + /* Zap runstate and time area handles. */ + set_xen_guest_handle(runstate_guest(v), NULL); + set_xen_guest_handle(v->arch.time_info_guest, NULL); + /* Reset the periodic timer to the default value. */ vcpu_set_periodic_timer(v, MILLISECS(10)); /* Stop the singleshot timer. */ -- generated by git-patchbot for /home/xen/git/xen.git#master
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