| 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-2024-26764: fs/aio: Restrict kiocb_set_cancel_fn() to I/O submitted via libaio |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| fs/aio: Restrict kiocb_set_cancel_fn() to I/O submitted via libaio |
| |
| If kiocb_set_cancel_fn() is called for I/O submitted via io_uring, the |
| following kernel warning appears: |
| |
| WARNING: CPU: 3 PID: 368 at fs/aio.c:598 kiocb_set_cancel_fn+0x9c/0xa8 |
| Call trace: |
| kiocb_set_cancel_fn+0x9c/0xa8 |
| ffs_epfile_read_iter+0x144/0x1d0 |
| io_read+0x19c/0x498 |
| io_issue_sqe+0x118/0x27c |
| io_submit_sqes+0x25c/0x5fc |
| __arm64_sys_io_uring_enter+0x104/0xab0 |
| invoke_syscall+0x58/0x11c |
| el0_svc_common+0xb4/0xf4 |
| do_el0_svc+0x2c/0xb0 |
| el0_svc+0x2c/0xa4 |
| el0t_64_sync_handler+0x68/0xb4 |
| el0t_64_sync+0x1a4/0x1a8 |
| |
| Fix this by setting the IOCB_AIO_RW flag for read and write I/O that is |
| submitted by libaio. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26764 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.19.308 with commit 337b543e274fe7a8f47df3c8293cc6686ffa620f |
| Fixed in 5.4.270 with commit b4eea7a05ee0ab5ab0514421e6ba8c5d249cf942 |
| Fixed in 5.10.211 with commit ea1cd64d59f22d6d13f367d62ec6e27b9344695f |
| Fixed in 5.15.150 with commit d7b6fa97ec894edd02f64b83e5e72e1aa352f353 |
| Fixed in 6.1.80 with commit 18f614369def2a11a52f569fe0f910b199d13487 |
| Fixed in 6.6.19 with commit e7e23fc5d5fe422827c9a43ecb579448f73876c7 |
| Fixed in 6.7.7 with commit 1dc7d74fe456944a9b1c57bd776280249f441ac6 |
| Fixed in 6.8 with commit b820de741ae48ccf50dd95e297889c286ff4f760 |
| |
| 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-2024-26764 |
| 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: |
| fs/aio.c |
| include/linux/fs.h |
| |
| |
| 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/337b543e274fe7a8f47df3c8293cc6686ffa620f |
| https://git.kernel.org/stable/c/b4eea7a05ee0ab5ab0514421e6ba8c5d249cf942 |
| https://git.kernel.org/stable/c/ea1cd64d59f22d6d13f367d62ec6e27b9344695f |
| https://git.kernel.org/stable/c/d7b6fa97ec894edd02f64b83e5e72e1aa352f353 |
| https://git.kernel.org/stable/c/18f614369def2a11a52f569fe0f910b199d13487 |
| https://git.kernel.org/stable/c/e7e23fc5d5fe422827c9a43ecb579448f73876c7 |
| https://git.kernel.org/stable/c/1dc7d74fe456944a9b1c57bd776280249f441ac6 |
| https://git.kernel.org/stable/c/b820de741ae48ccf50dd95e297889c286ff4f760 |
