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sunrpc: Fix potential leaks in sunrpc_cache_unhash()

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[ Upstream commit 1d82163714 ]

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>
This commit is contained in:
Trond Myklebust 2020-01-06 13:40:34 -05:00 committed by Greg Kroah-Hartman
parent 46503858e2
commit 707518c16b
1 changed files with 2 additions and 0 deletions
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2
net/sunrpc/cache.c
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@ -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);