| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-56694: bpf: fix recursive lock when verdict program return SK_PASS |
| |
| 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/6684a5864ec86_403d20898@john.notmuch |
| |
| The Linux kernel CVE team has assigned CVE-2024-56694 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.9 with commit 6648e613226e18897231ab5e42ffc29e63fa3365 and fixed in 5.4.289 with commit 078f7e1521442a55db4bed812a2fbaf02ac33819 |
| Issue introduced in 5.10.223 with commit c0809c128dad4c3413818384eb06a341633db973 and fixed in 5.10.233 with commit 221109ba2127eabd0aa64718543638b58b15df56 |
| Issue introduced in 5.15.159 with commit 5965bc7535fb87510b724e5465ccc1a1cf00916d and fixed in 5.15.174 with commit 6694f7acd625ed854bf6342926e771d65dad7f69 |
| Issue introduced in 6.1.91 with commit 39dc9e1442385d6e9be0b6491ee488dddd55ae27 and fixed in 6.1.120 with commit 386efa339e08563dd33e83bc951aea5d407fe578 |
| Issue introduced in 6.6.31 with commit b397a0ab8582c533ec0c6b732392f141fc364f87 and fixed in 6.6.64 with commit da2bc8a0c8f3ac66fdf980fc59936f851a083561 |
| Issue introduced in 6.9 with commit 6648e613226e18897231ab5e42ffc29e63fa3365 and fixed in 6.11.11 with commit 01f1b88acfd79103da0610b45471f6c88ea98d72 |
| Issue introduced in 6.9 with commit 6648e613226e18897231ab5e42ffc29e63fa3365 and fixed in 6.12.2 with commit f84c5ef6ca23cc2f72f3b830d74f67944684bb05 |
| Issue introduced in 6.9 with commit 6648e613226e18897231ab5e42ffc29e63fa3365 and fixed in 6.13 with commit 8ca2a1eeadf09862190b2810697702d803ceef2d |
| Issue introduced in 6.8.10 with commit 772d5729b5ff0df0d37b32db600ce635b2172f80 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-56694 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| net/core/skmsg.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/078f7e1521442a55db4bed812a2fbaf02ac33819 |
| https://git.kernel.org/stable/c/221109ba2127eabd0aa64718543638b58b15df56 |
| https://git.kernel.org/stable/c/6694f7acd625ed854bf6342926e771d65dad7f69 |
| https://git.kernel.org/stable/c/386efa339e08563dd33e83bc951aea5d407fe578 |
| https://git.kernel.org/stable/c/da2bc8a0c8f3ac66fdf980fc59936f851a083561 |
| https://git.kernel.org/stable/c/01f1b88acfd79103da0610b45471f6c88ea98d72 |
| https://git.kernel.org/stable/c/f84c5ef6ca23cc2f72f3b830d74f67944684bb05 |
| https://git.kernel.org/stable/c/8ca2a1eeadf09862190b2810697702d803ceef2d |
