From: Trond Myklebust <trondmy@gmail.com>
Date: Mon, 6 Jan 2020 18:40:34 +0000 (-0500)
Subject: sunrpc: Fix potential leaks in sunrpc_cache_unhash()
X-Git-Tag: v5.5.6~76
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=6affad9aded3dd6879ad852be8bf993f6071f106;p=users%2Fdwmw2%2Flinux.git

sunrpc: Fix potential leaks in sunrpc_cache_unhash()

[ Upstream commit 1d82163714c16ebe09c7a8c9cd3cef7abcc16208 ]

When we unhash the cache entry, we need to handle any pending upcalls
by calling cache_fresh_unlocked().

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index f740cb51802af..7ede1e52fd812 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -1888,7 +1888,9 @@ void sunrpc_cache_unhash(struct cache_detail *cd, struct cache_head *h)
 	if (!hlist_unhashed(&h->cache_list)){
 		hlist_del_init_rcu(&h->cache_list);
 		cd->entries--;
+		set_bit(CACHE_CLEANED, &h->flags);
 		spin_unlock(&cd->hash_lock);
+		cache_fresh_unlocked(h, cd);
 		cache_put(h, cd);
 	} else
 		spin_unlock(&cd->hash_lock);