Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: tcp: clear sock_ops cb flags before force-closing a child socket A child socket inherits the listener's bpf_sock_ops_cb_flags via sk_clone_lock(). If its setup fails in tcp_v4_syn_recv_sock() / tcp_v6_syn_recv_sock(), the child is freed through put_and_exit, where inet_csk_prepare_forced_close() drops the socket lock and tcp_done() runs without it. If BPF_SOCK_OPS_STATE_CB_FLAG was inherited, tcp_done() -> tcp_set_state() calls tcp_call_bpf(), which expects the lock and trips sock_owned_by_me(): WARNING: include/net/sock.h:1799 at tcp_set_state+0x433/0x550 RIP: 0010:tcp_set_state+0x433/0x550 include/net/sock.h:1799 Call Trace: <IRQ> tcp_done+0xba/0x250 net/ipv4/tcp.c:5095 tcp_v4_syn_recv_sock+0x850/0xa50 net/ipv4/tcp_ipv4.c:1787 tcp_check_req+0xf30/0x1360 net/ipv4/tcp_minisocks.c:926 tcp_v4_rcv+0x1047/0x1b50 net/ipv4/tcp_ipv4.c:2164 </IRQ> The child is freed before it is ever established, so it should run no sock_ops callback. Clear its cb flags in inet_csk_prepare_for_destroy_sock(), the common point for the IPv4, IPv6 and chtls forced-close paths and for the MPTCP ->syn_recv_sock() failure path (dispose_child), which reaches tcp_done() on a child that was never established too.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d44874910a26f3a8f81edf873a2473363f07f660 before 5d5389b2c37ca00da61d1407618ebe15abae0c8b; affected d44874910a26f3a8f81edf873a2473363f07f660 before 9f30ba9aa0270a18fdd1e6cd426c480c35f7de9d; affected d44874910a26f3a8f81edf873a2473363f07f660 before 71e9c53220abd7f5a45aa4d5e5b420d3479f3a4f; affected d44874910a26f3a8f81edf873a2473363f07f660 before 9fffa6465851a1910a6e9cb7272787dd615b26b1; affected d44874910a26f3a8f81edf873a2473363f07f660 before fe23d56e9266d58ba5c380f1970118eedeee0b68; affected d44874910a26f3a8f81edf873a2473363f07f660 before ce311bd2e36596f0aa2c92ca86fb3e019ac57eae; affected d44874910a26f3a8f81edf873a2473363f07f660 before 8874dafc9099bc49c2e5ebba030f85d276421f92; affected d44874910a26f3a8f81edf873a2473363f07f660 before 990348e5bb457697c2f1f7f7b65154a3334d9d2b |
| Linux / Linux | affected 4.16; unaffected 0 before 4.16; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/5d5389b2c37ca00da61d1407618ebe15abae0c8b
- https://git.kernel.org/stable/c/9f30ba9aa0270a18fdd1e6cd426c480c35f7de9d
- https://git.kernel.org/stable/c/71e9c53220abd7f5a45aa4d5e5b420d3479f3a4f
- https://git.kernel.org/stable/c/9fffa6465851a1910a6e9cb7272787dd615b26b1
- https://git.kernel.org/stable/c/fe23d56e9266d58ba5c380f1970118eedeee0b68
- https://git.kernel.org/stable/c/ce311bd2e36596f0aa2c92ca86fb3e019ac57eae
- https://git.kernel.org/stable/c/8874dafc9099bc49c2e5ebba030f85d276421f92
- https://git.kernel.org/stable/c/990348e5bb457697c2f1f7f7b65154a3334d9d2b
ADP enrichment
No English description supplied.
No references supplied.