| Message ID | 20241115003221.733593-1-kuba@kernel.org (mailing list archive) |
|---|---|
| State | New |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | [net-next] net/neighbor: clear error in case strict check is not set | expand |
diff --git a/net/core/neighbour.c b/net/core/neighbour.c index 77b819cd995b..cc58315a40a7 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -2876,6 +2876,7 @@ static int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb) err = neigh_valid_dump_req(nlh, cb->strict_check, &filter, cb->extack); if (err < 0 && cb->strict_check) return err; + err = 0; s_t = cb->args[0];
Commit 51183d233b5a ("net/neighbor: Update neigh_dump_info for strict data checking") added strict checking. The err variable is not cleared, so if we find no table to dump we will return the validation error even if user did not want strict checking. I think the only way to hit this is to send an buggy request, and ask for a table which doesn't exist, so there's no point treating this as a real fix. I only noticed it because a syzbot repro depended on it to trigger another bug. Signed-off-by: Jakub Kicinski <kuba@kernel.org> --- CC: joel.granados@kernel.org --- net/core/neighbour.c | 1 + 1 file changed, 1 insertion(+)