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Fix small kernel memory disclosures. [EN-18:12.mem]

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Reported by:	Thomas Barabosch, Fraunhofer FKIE
Approved by:	so
Security:	FreeBSD-EN-18:12.mem
Security:	CVE-2018-17155
This commit is contained in:
gordon 2018-09-27 18:36:30 +00:00 committed by Franco Fichtner
parent f90dc93b2a
commit 4a1c7d28db
1 changed files with 2 additions and 0 deletions
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2
sys/kern/kern_context.c
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@ -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);