| From bippy-1.1.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2023-53121: tcp: tcp_make_synack() can be called from process context |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| tcp: tcp_make_synack() can be called from process context |
| |
| tcp_rtx_synack() now could be called in process context as explained in |
| 0a375c822497 ("tcp: tcp_rtx_synack() can be called from process |
| context"). |
| |
| tcp_rtx_synack() might call tcp_make_synack(), which will touch per-CPU |
| variables with preemption enabled. This causes the following BUG: |
| |
| BUG: using __this_cpu_add() in preemptible [00000000] code: ThriftIO1/5464 |
| caller is tcp_make_synack+0x841/0xac0 |
| Call Trace: |
| <TASK> |
| dump_stack_lvl+0x10d/0x1a0 |
| check_preemption_disabled+0x104/0x110 |
| tcp_make_synack+0x841/0xac0 |
| tcp_v6_send_synack+0x5c/0x450 |
| tcp_rtx_synack+0xeb/0x1f0 |
| inet_rtx_syn_ack+0x34/0x60 |
| tcp_check_req+0x3af/0x9e0 |
| tcp_rcv_state_process+0x59b/0x2030 |
| tcp_v6_do_rcv+0x5f5/0x700 |
| release_sock+0x3a/0xf0 |
| tcp_sendmsg+0x33/0x40 |
| ____sys_sendmsg+0x2f2/0x490 |
| __sys_sendmsg+0x184/0x230 |
| do_syscall_64+0x3d/0x90 |
| |
| Avoid calling __TCP_INC_STATS() with will touch per-cpu variables. Use |
| TCP_INC_STATS() which is safe to be called from context switch. |
| |
| The Linux kernel CVE team has assigned CVE-2023-53121 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.7 with commit 8336886f786fdacbc19b719c1f7ea91eb70706d4 and fixed in 4.14.311 with commit d493d4fe88195a144d6a277a90062a7534ed2192 |
| Issue introduced in 3.7 with commit 8336886f786fdacbc19b719c1f7ea91eb70706d4 and fixed in 4.19.279 with commit e23ca307745be3df7fe9762f3e2a7e311a57852e |
| Issue introduced in 3.7 with commit 8336886f786fdacbc19b719c1f7ea91eb70706d4 and fixed in 5.4.238 with commit 442aa78ed70188b21ccd8669738448702c0a3281 |
| Issue introduced in 3.7 with commit 8336886f786fdacbc19b719c1f7ea91eb70706d4 and fixed in 5.10.176 with commit 77ad58bca0119e8cc3e0e9d91a3f22caa66e4dfa |
| Issue introduced in 3.7 with commit 8336886f786fdacbc19b719c1f7ea91eb70706d4 and fixed in 5.15.104 with commit ad07290d63ff6689f50565b02f5b6f34ec15a5ca |
| Issue introduced in 3.7 with commit 8336886f786fdacbc19b719c1f7ea91eb70706d4 and fixed in 6.1.21 with commit 9180aa4622a720b433e842b4d3aa34d73eec577a |
| Issue introduced in 3.7 with commit 8336886f786fdacbc19b719c1f7ea91eb70706d4 and fixed in 6.2.8 with commit 7613cde8c0c1f02a7ec2e1d536c01b65b135fc1c |
| Issue introduced in 3.7 with commit 8336886f786fdacbc19b719c1f7ea91eb70706d4 and fixed in 6.3 with commit bced3f7db95ff2e6ca29dc4d1c9751ab5e736a09 |
| |
| 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-2023-53121 |
| 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/ipv4/tcp_output.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/d493d4fe88195a144d6a277a90062a7534ed2192 |
| https://git.kernel.org/stable/c/e23ca307745be3df7fe9762f3e2a7e311a57852e |
| https://git.kernel.org/stable/c/442aa78ed70188b21ccd8669738448702c0a3281 |
| https://git.kernel.org/stable/c/77ad58bca0119e8cc3e0e9d91a3f22caa66e4dfa |
| https://git.kernel.org/stable/c/ad07290d63ff6689f50565b02f5b6f34ec15a5ca |
| https://git.kernel.org/stable/c/9180aa4622a720b433e842b4d3aa34d73eec577a |
| https://git.kernel.org/stable/c/7613cde8c0c1f02a7ec2e1d536c01b65b135fc1c |
| https://git.kernel.org/stable/c/bced3f7db95ff2e6ca29dc4d1c9751ab5e736a09 |
