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MFp4 (112499):

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Protect em->shared with the lock in case of CLONE_THREAD.

Submitted by:	rdivacky
This commit is contained in:
Alexander Leidinger 2007-01-07 19:09:20 +00:00
parent 1c65504ca8
commit 291081ce0a
1 changed files with 2 additions and 0 deletions
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2
sys/compat/linux/linux_emul.c
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@ -119,10 +119,12 @@ linux_proc_init(struct thread *td, pid_t child, int flags)
if (child != 0) {
if (flags & CLONE_THREAD) {
/* lookup the parent */
EMUL_SHARED_WLOCK(&emul_shared_lock);
p_em = em_find(td->td_proc, EMUL_DONTLOCK);
KASSERT(p_em != NULL, ("proc_init: parent emuldata not found for CLONE_THREAD\n"));
em->shared = p_em->shared;
em->shared->refs++;
EMUL_SHARED_WUNLOCK(&emul_shared_lock);
} else {
/*
* handled earlier to avoid malloc(M_WAITOK) with