| 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-2022-49685: iio: trigger: sysfs: fix use-after-free on remove |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| iio: trigger: sysfs: fix use-after-free on remove |
| |
| Ensure that the irq_work has completed before the trigger is freed. |
| |
| ================================================================== |
| BUG: KASAN: use-after-free in irq_work_run_list |
| Read of size 8 at addr 0000000064702248 by task python3/25 |
| |
| Call Trace: |
| irq_work_run_list |
| irq_work_tick |
| update_process_times |
| tick_sched_handle |
| tick_sched_timer |
| __hrtimer_run_queues |
| hrtimer_interrupt |
| |
| Allocated by task 25: |
| kmem_cache_alloc_trace |
| iio_sysfs_trig_add |
| dev_attr_store |
| sysfs_kf_write |
| kernfs_fop_write_iter |
| new_sync_write |
| vfs_write |
| ksys_write |
| sys_write |
| |
| Freed by task 25: |
| kfree |
| iio_sysfs_trig_remove |
| dev_attr_store |
| sysfs_kf_write |
| kernfs_fop_write_iter |
| new_sync_write |
| vfs_write |
| ksys_write |
| sys_write |
| |
| ================================================================== |
| |
| The Linux kernel CVE team has assigned CVE-2022-49685 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.7 with commit f38bc926d022ebd67baad6ac7fc22c95fbc6238c and fixed in 4.9.321 with commit d6111e7bdb8ec27eb43d01c4cd4ff1620a75f7f2 |
| Issue introduced in 3.7 with commit f38bc926d022ebd67baad6ac7fc22c95fbc6238c and fixed in 4.14.286 with commit fd5d8fb298a2866c337da635c79d63c3afabcaf7 |
| Issue introduced in 3.7 with commit f38bc926d022ebd67baad6ac7fc22c95fbc6238c and fixed in 4.19.250 with commit 31ff3309b47d98313c61b8301bf595820cc3cc33 |
| Issue introduced in 3.7 with commit f38bc926d022ebd67baad6ac7fc22c95fbc6238c and fixed in 5.4.202 with commit 5e39397d60dacc7f5d81d442c1c958eaaaf31128 |
| Issue introduced in 3.7 with commit f38bc926d022ebd67baad6ac7fc22c95fbc6238c and fixed in 5.10.127 with commit b07a30a774b3c3e584a68dc91779c68ea2da4813 |
| Issue introduced in 3.7 with commit f38bc926d022ebd67baad6ac7fc22c95fbc6238c and fixed in 5.15.51 with commit 4687c3f955240ca2a576bdc3f742d4d915b6272d |
| Issue introduced in 3.7 with commit f38bc926d022ebd67baad6ac7fc22c95fbc6238c and fixed in 5.18.8 with commit 4ef1e521be610b720daeb7cf899fedc7db0274c4 |
| Issue introduced in 3.7 with commit f38bc926d022ebd67baad6ac7fc22c95fbc6238c and fixed in 5.19 with commit 78601726d4a59a291acc5a52da1d3a0a6831e4e8 |
| |
| 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-2022-49685 |
| 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: |
| drivers/iio/trigger/iio-trig-sysfs.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/d6111e7bdb8ec27eb43d01c4cd4ff1620a75f7f2 |
| https://git.kernel.org/stable/c/fd5d8fb298a2866c337da635c79d63c3afabcaf7 |
| https://git.kernel.org/stable/c/31ff3309b47d98313c61b8301bf595820cc3cc33 |
| https://git.kernel.org/stable/c/5e39397d60dacc7f5d81d442c1c958eaaaf31128 |
| https://git.kernel.org/stable/c/b07a30a774b3c3e584a68dc91779c68ea2da4813 |
| https://git.kernel.org/stable/c/4687c3f955240ca2a576bdc3f742d4d915b6272d |
| https://git.kernel.org/stable/c/4ef1e521be610b720daeb7cf899fedc7db0274c4 |
| https://git.kernel.org/stable/c/78601726d4a59a291acc5a52da1d3a0a6831e4e8 |
