diff options
| author | Florian Lehner <dev@der-flo.net> | 2023-11-05 09:58:01 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-25 15:35:19 -0800 |
| commit | de0b27e6326e1e22b17a5ae8c99f31fe30ac286b (patch) | |
| tree | 732d7fcb5a4a02b7346762d64040c0635e4eced2 /include/uapi/linux | |
| parent | 153267f9513fa275ad32d6fd988357a40d2794a2 (diff) | |
bpf, lpm: Fix check prefixlen before walking trie
[ Upstream commit 9b75dbeb36fcd9fc7ed51d370310d0518a387769 ]
When looking up an element in LPM trie, the condition 'matchlen ==
trie->max_prefixlen' will never return true, if key->prefixlen is larger
than trie->max_prefixlen. Consequently all elements in the LPM trie will
be visited and no element is returned in the end.
To resolve this, check key->prefixlen first before walking the LPM trie.
Fixes: b95a5c4db09b ("bpf: add a longest prefix match trie map implementation")
Signed-off-by: Florian Lehner <dev@der-flo.net>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20231105085801.3742-1-dev@der-flo.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/uapi/linux')
0 files changed, 0 insertions, 0 deletions