The branch main has been updated by jamie:
URL:
https://cgit.FreeBSD.org/src/commit/?id=25c2c952e3f64ec1a59033c0e2dc870a6c818a84
commit 25c2c952e3f64ec1a59033c0e2dc870a6c818a84
Author: Jamie Gritton <ja...@freebsd.org>
AuthorDate: 2021-01-18 01:37:03 +0000
Commit: Jamie Gritton <ja...@freebsd.org>
CommitDate: 2021-01-18 01:41:09 +0000
jail: Add proper prison locking in mqfs_prison_remove.
---
sys/kern/uipc_mqueue.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/sys/kern/uipc_mqueue.c b/sys/kern/uipc_mqueue.c
index fc888023a40f..309fa3423fbd 100644
--- a/sys/kern/uipc_mqueue.c
+++ b/sys/kern/uipc_mqueue.c
@@ -1562,14 +1562,16 @@ static int
mqfs_prison_remove(void *obj, void *data __unused)
{
const struct prison *pr = obj;
- const struct prison *tpr;
+ struct prison *tpr;
struct mqfs_node *pn, *tpn;
int found;
found = 0;
TAILQ_FOREACH(tpr, &allprison, pr_list) {
+ prison_lock(tpr);
if (tpr->pr_root == pr->pr_root && tpr != pr && tpr->pr_ref > 0)
found = 1;
+ prison_unlock(tpr);
}
if (!found) {
/*
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