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-rw-r--r--sys/kern/kern_context.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/kern/kern_context.c b/sys/kern/kern_context.c
index 70751d02cba8..acd3ded2a20c 100644
--- a/sys/kern/kern_context.c
+++ b/sys/kern/kern_context.c
@@ -68,6 +68,7 @@ sys_getcontext(struct thread *td, struct getcontext_args *uap)
if (uap->ucp == NULL)
ret = EINVAL;
else {
+ bzero(&uc, sizeof(ucontext_t));
get_mcontext(td, &uc.uc_mcontext, GET_MC_CLEAR_RET);
PROC_LOCK(td->td_proc);
uc.uc_sigmask = td->td_sigmask;
@@ -108,6 +109,7 @@ sys_swapcontext(struct thread *td, struct swapcontext_args *uap)
if (uap->oucp == NULL || uap->ucp == NULL)
ret = EINVAL;
else {
+ bzero(&uc, sizeof(ucontext_t));
get_mcontext(td, &uc.uc_mcontext, GET_MC_CLEAR_RET);
bzero(uc.__spare__, sizeof(uc.__spare__));
PROC_LOCK(td->td_proc);