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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, TCS Robot <tcs_robot@tencent.com>,
        Haimin Zhang <tcs_kernel@tencent.com>,
        Alexei Starovoitov <ast@kernel.org>,
        Joanne Koong <joannekoong@fb.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.16 0361/1039] bpf: Add missing map_get_next_key method to bloom filter map.
Date:   Mon, 24 Jan 2022 19:35:50 +0100
Message-Id: <20220124184137.412435046@linuxfoundation.org>
In-Reply-To: <20220124184125.121143506@linuxfoundation.org>
References: <20220124184125.121143506@linuxfoundation.org>
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From: Haimin Zhang <tcs_kernel@tencent.com>

[ Upstream commit 3ccdcee28415c4226de05438b4d89eb5514edf73 ]

Without it, kernel crashes in map_get_next_key().

Fixes: 9330986c0300 ("bpf: Add bloom filter map implementation")
Reported-by: TCS Robot <tcs_robot@tencent.com>
Signed-off-by: Haimin Zhang <tcs_kernel@tencent.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Joanne Koong <joannekoong@fb.com>
Link: https://lore.kernel.org/bpf/1640776802-22421-1-git-send-email-tcs.kernel@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/bpf/bloom_filter.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/bpf/bloom_filter.c b/kernel/bpf/bloom_filter.c
index 277a05e9c9849..b141a1346f72d 100644
--- a/kernel/bpf/bloom_filter.c
+++ b/kernel/bpf/bloom_filter.c
@@ -82,6 +82,11 @@ static int bloom_map_delete_elem(struct bpf_map *map, void *value)
 	return -EOPNOTSUPP;
 }
 
+static int bloom_map_get_next_key(struct bpf_map *map, void *key, void *next_key)
+{
+	return -EOPNOTSUPP;
+}
+
 static struct bpf_map *bloom_map_alloc(union bpf_attr *attr)
 {
 	u32 bitset_bytes, bitset_mask, nr_hash_funcs, nr_bits;
@@ -192,6 +197,7 @@ const struct bpf_map_ops bloom_filter_map_ops = {
 	.map_meta_equal = bpf_map_meta_equal,
 	.map_alloc = bloom_map_alloc,
 	.map_free = bloom_map_free,
+	.map_get_next_key = bloom_map_get_next_key,
 	.map_push_elem = bloom_map_push_elem,
 	.map_peek_elem = bloom_map_peek_elem,
 	.map_pop_elem = bloom_map_pop_elem,
-- 
2.34.1