### [CVE-2024-56694](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-56694)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
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### Description

In the Linux kernel, the following vulnerability has been resolved:bpf: fix recursive lock when verdict program return SK_PASSWhen the stream_verdict program returns SK_PASS, it places the received skbinto its own receive queue, but a recursive lock eventually occurs, leadingto an operating system deadlock. This issue has been present since v6.9.'''sk_psock_strp_data_ready    write_lock_bh(&sk->sk_callback_lock)    strp_data_ready      strp_read_sock        read_sock -> tcp_read_sock          strp_recv            cb.rcv_msg -> sk_psock_strp_read              # now stream_verdict return SK_PASS without peer sock assign              __SK_PASS = sk_psock_map_verd(SK_PASS, NULL)              sk_psock_verdict_apply                sk_psock_skb_ingress_self                  sk_psock_skb_ingress_enqueue                    sk_psock_data_ready                      read_lock_bh(&sk->sk_callback_lock) <= dead lock'''This topic has been discussed before, but it has not been fixed.Previous discussion:https://lore.kernel.org/all/6684a5864ec86_403d20898@john.notmuch

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/cku-heise/euvd-api-doc
- https://github.com/fkie-cad/nvd-json-data-feeds
- https://github.com/w4zu/Debian_security