| 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-2024-40922: io_uring/rsrc: don't lock while !TASK_RUNNING |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| io_uring/rsrc: don't lock while !TASK_RUNNING |
| |
| There is a report of io_rsrc_ref_quiesce() locking a mutex while not |
| TASK_RUNNING, which is due to forgetting restoring the state back after |
| io_run_task_work_sig() and attempts to break out of the waiting loop. |
| |
| do not call blocking ops when !TASK_RUNNING; state=1 set at |
| [<ffffffff815d2494>] prepare_to_wait+0xa4/0x380 |
| kernel/sched/wait.c:237 |
| WARNING: CPU: 2 PID: 397056 at kernel/sched/core.c:10099 |
| __might_sleep+0x114/0x160 kernel/sched/core.c:10099 |
| RIP: 0010:__might_sleep+0x114/0x160 kernel/sched/core.c:10099 |
| Call Trace: |
| <TASK> |
| __mutex_lock_common kernel/locking/mutex.c:585 [inline] |
| __mutex_lock+0xb4/0x940 kernel/locking/mutex.c:752 |
| io_rsrc_ref_quiesce+0x590/0x940 io_uring/rsrc.c:253 |
| io_sqe_buffers_unregister+0xa2/0x340 io_uring/rsrc.c:799 |
| __io_uring_register io_uring/register.c:424 [inline] |
| __do_sys_io_uring_register+0x5b9/0x2400 io_uring/register.c:613 |
| do_syscall_x64 arch/x86/entry/common.c:52 [inline] |
| do_syscall_64+0xd8/0x270 arch/x86/entry/common.c:83 |
| entry_SYSCALL_64_after_hwframe+0x6f/0x77 |
| |
| The Linux kernel CVE team has assigned CVE-2024-40922 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.4 with commit 4ea15b56f0810f0d8795d475db1bb74b3a7c1b2f and fixed in 6.6.35 with commit 0c9df3df0c888d9ec8d11a68474a4aa04d371cff |
| Issue introduced in 6.4 with commit 4ea15b56f0810f0d8795d475db1bb74b3a7c1b2f and fixed in 6.9.6 with commit 4429c6c77e176a4c5aa7a3bbd1632f9fc0582518 |
| Issue introduced in 6.4 with commit 4ea15b56f0810f0d8795d475db1bb74b3a7c1b2f and fixed in 6.10 with commit 54559642b96116b45e4b5ca7fd9f7835b8561272 |
| |
| 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-2024-40922 |
| 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: |
| io_uring/rsrc.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/0c9df3df0c888d9ec8d11a68474a4aa04d371cff |
| https://git.kernel.org/stable/c/4429c6c77e176a4c5aa7a3bbd1632f9fc0582518 |
| https://git.kernel.org/stable/c/54559642b96116b45e4b5ca7fd9f7835b8561272 |
