vulnerability

Huawei EulerOS: CVE-2024-56694: kernel security update

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
Dec 28, 2024
Added
Jun 11, 2025
Modified
Aug 13, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

bpf: fix recursive lock when verdict program return SK_PASS

When the stream_verdict program returns SK_PASS, it places the received skb
into its own receive queue, but a recursive lock eventually occurs, leading
to 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/[email protected]

Solutions

huawei-euleros-2_0_sp12-upgrade-bpftoolhuawei-euleros-2_0_sp12-upgrade-kernelhuawei-euleros-2_0_sp12-upgrade-kernel-abi-stablelistshuawei-euleros-2_0_sp12-upgrade-kernel-toolshuawei-euleros-2_0_sp12-upgrade-kernel-tools-libshuawei-euleros-2_0_sp12-upgrade-python3-perf
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