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authorAlexander Leidinger <netchild@FreeBSD.org>2007-01-07 19:09:20 +0000
committerAlexander Leidinger <netchild@FreeBSD.org>2007-01-07 19:09:20 +0000
commit291081ce0a03bfab5edacb60dd96934cca7e687b (patch)
treedb5633e7d69cc1cc01f21fff33065a772f55908a /sys/compat
parent1c65504ca8bb2d3696e328120de762d764e10cdf (diff)
downloadsrc-291081ce0a03bfab5edacb60dd96934cca7e687b.tar.gz
src-291081ce0a03bfab5edacb60dd96934cca7e687b.zip
MFp4 (112499):
Protect em->shared with the lock in case of CLONE_THREAD. Submitted by: rdivacky
Notes
Notes: svn path=/head/; revision=165868
Diffstat (limited to 'sys/compat')
-rw-r--r--sys/compat/linux/linux_emul.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/compat/linux/linux_emul.c b/sys/compat/linux/linux_emul.c
index 4083f537ebc3..a06e23135b3a 100644
--- a/sys/compat/linux/linux_emul.c
+++ b/sys/compat/linux/linux_emul.c
@@ -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