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Assert that TDP_NOFAULTING and TDP_NOSPEEPING thread flags do not leak

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when thread returns from a syscall to usermode.

Tested by:	pho
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2012-05-30 13:44:42 +00:00
parent 0cdf461105
commit 6c5d7af158
1 changed files with 6 additions and 0 deletions
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6
sys/kern/subr_syscall.c
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@ -182,6 +182,12 @@ syscallret(struct thread *td, int error, struct syscall_args *sa __unused)
KASSERT(td->td_locks == 0,
("System call %s returning with %d locks held",
syscallname(p, sa->code), td->td_locks));
KASSERT((td->td_pflags & TDP_NOFAULTING) == 0,
("System call %s returning with pagefaults disabled",
syscallname(p, sa->code)));
KASSERT((td->td_pflags & TDP_NOSLEEPING) == 0,
("System call %s returning with sleep disabled",
syscallname(p, sa->code)));
/*
* Handle reschedule and other end-of-syscall issues