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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/net/sunrpc/svcauth_unix.c
..
..
@@ -424,14 +424,23 @@
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 	return hash_long(from_kuid(&init_user_ns, uid), GID_HASHBITS);
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 }
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+static void unix_gid_free(struct rcu_head *rcu)
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+{
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+	struct unix_gid *ug = container_of(rcu, struct unix_gid, rcu);
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+	struct cache_head *item = &ug->h;
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+
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+	if (test_bit(CACHE_VALID, &item->flags) &&
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+	    !test_bit(CACHE_NEGATIVE, &item->flags))
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+		put_group_info(ug->gi);
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+	kfree(ug);
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+}
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+
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 static void unix_gid_put(struct kref *kref)
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 {
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 	struct cache_head *item = container_of(kref, struct cache_head, ref);
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 	struct unix_gid *ug = container_of(item, struct unix_gid, h);
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-	if (test_bit(CACHE_VALID, &item->flags) &&
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-	    !test_bit(CACHE_NEGATIVE, &item->flags))
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-		put_group_info(ug->gi);
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-	kfree_rcu(ug, rcu);
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+
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+	call_rcu(&ug->rcu, unix_gid_free);
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 }
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 static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew)