| 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-2024-50294: rxrpc: Fix missing locking causing hanging calls |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| rxrpc: Fix missing locking causing hanging calls |
| |
| If a call gets aborted (e.g. because kafs saw a signal) between it being |
| queued for connection and the I/O thread picking up the call, the abort |
| will be prioritised over the connection and it will be removed from |
| local->new_client_calls by rxrpc_disconnect_client_call() without a lock |
| being held. This may cause other calls on the list to disappear if a race |
| occurs. |
| |
| Fix this by taking the client_call_lock when removing a call from whatever |
| list its ->wait_link happens to be on. |
| |
| The Linux kernel CVE team has assigned CVE-2024-50294 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.2 with commit 9d35d880e0e4a3ab32d8c12f9e4d76198aadd42d and fixed in 6.6.61 with commit 996a7208dadbf2cdda8d51444d5ee1fdd1ccbc92 |
| Issue introduced in 6.2 with commit 9d35d880e0e4a3ab32d8c12f9e4d76198aadd42d and fixed in 6.11.8 with commit b1fdb0bb3b6513f5bd26f92369fd6ac1a2422d8b |
| Issue introduced in 6.2 with commit 9d35d880e0e4a3ab32d8c12f9e4d76198aadd42d and fixed in 6.12 with commit fc9de52de38f656399d2ce40f7349a6b5f86e787 |
| |
| 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-2024-50294 |
| 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: |
| include/trace/events/rxrpc.h |
| net/rxrpc/conn_client.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/996a7208dadbf2cdda8d51444d5ee1fdd1ccbc92 |
| https://git.kernel.org/stable/c/b1fdb0bb3b6513f5bd26f92369fd6ac1a2422d8b |
| https://git.kernel.org/stable/c/fc9de52de38f656399d2ce40f7349a6b5f86e787 |
