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nfsd: Fix an Oops in free_session()

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commit bb6ad5572c upstream.

In call_xpt_users(), we delete the entry from the list, but we
do not reinitialise it. This triggers the list poisoning when
we later call unregister_xpt_user() in nfsd4_del_conns().

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Trond Myklebust 2018-10-09 15:54:15 -04:00 committed by Greg Kroah-Hartman
parent eecbf2c22b
commit eecd97e13c
1 changed files with 1 additions and 1 deletions
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2
net/sunrpc/svc_xprt.c
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@ -1040,7 +1040,7 @@ static void call_xpt_users(struct svc_xprt *xprt)
spin_lock(&xprt->xpt_lock);
while (!list_empty(&xprt->xpt_users)) {
u = list_first_entry(&xprt->xpt_users, struct svc_xpt_user, list);
list_del(&u->list);
list_del_init(&u->list);
u->callback(u);
}
spin_unlock(&xprt->xpt_lock);