| 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-2022-49010: hwmon: (coretemp) Check for null before removing sysfs attrs |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| hwmon: (coretemp) Check for null before removing sysfs attrs |
| |
| If coretemp_add_core() gets an error then pdata->core_data[indx] |
| is already NULL and has been kfreed. Don't pass that to |
| sysfs_remove_group() as that will crash in sysfs_remove_group(). |
| |
| [Shortened for readability] |
| [91854.020159] sysfs: cannot create duplicate filename '/devices/platform/coretemp.0/hwmon/hwmon2/temp20_label' |
| <cpu offline> |
| [91855.126115] BUG: kernel NULL pointer dereference, address: 0000000000000188 |
| [91855.165103] #PF: supervisor read access in kernel mode |
| [91855.194506] #PF: error_code(0x0000) - not-present page |
| [91855.224445] PGD 0 P4D 0 |
| [91855.238508] Oops: 0000 [#1] PREEMPT SMP PTI |
| ... |
| [91855.342716] RIP: 0010:sysfs_remove_group+0xc/0x80 |
| ... |
| [91855.796571] Call Trace: |
| [91855.810524] coretemp_cpu_offline+0x12b/0x1dd [coretemp] |
| [91855.841738] ? coretemp_cpu_online+0x180/0x180 [coretemp] |
| [91855.871107] cpuhp_invoke_callback+0x105/0x4b0 |
| [91855.893432] cpuhp_thread_fun+0x8e/0x150 |
| ... |
| |
| Fix this by checking for NULL first. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49010 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.0 with commit 199e0de7f5df31a4fc485d4aaaf8a07718252ace and fixed in 4.9.335 with commit fb503d077ff7b43913503eaf72995d1239028b99 |
| Issue introduced in 3.0 with commit 199e0de7f5df31a4fc485d4aaaf8a07718252ace and fixed in 4.14.301 with commit 070d5ea4a0592a37ad96ce7f7b6b024f90bb009f |
| Issue introduced in 3.0 with commit 199e0de7f5df31a4fc485d4aaaf8a07718252ace and fixed in 4.19.268 with commit 280110db1a7d62ad635b103bafc3ae96e8bef75c |
| Issue introduced in 3.0 with commit 199e0de7f5df31a4fc485d4aaaf8a07718252ace and fixed in 5.4.226 with commit 89eecabe6a47403237f45aafd7d24f93cb973653 |
| Issue introduced in 3.0 with commit 199e0de7f5df31a4fc485d4aaaf8a07718252ace and fixed in 5.10.158 with commit f06e0cd01eab954bd5f2190c9faa79bb5357e05b |
| Issue introduced in 3.0 with commit 199e0de7f5df31a4fc485d4aaaf8a07718252ace and fixed in 5.15.82 with commit 7692700ac818866d138a8de555130a6e70e6ac16 |
| Issue introduced in 3.0 with commit 199e0de7f5df31a4fc485d4aaaf8a07718252ace and fixed in 6.0.12 with commit ae6c8b6e5d5628df1c475c0a8fca1465e205c95b |
| Issue introduced in 3.0 with commit 199e0de7f5df31a4fc485d4aaaf8a07718252ace and fixed in 6.1 with commit a89ff5f5cc64b9fe7a992cf56988fd36f56ca82a |
| |
| 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-2022-49010 |
| 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/hwmon/coretemp.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/fb503d077ff7b43913503eaf72995d1239028b99 |
| https://git.kernel.org/stable/c/070d5ea4a0592a37ad96ce7f7b6b024f90bb009f |
| https://git.kernel.org/stable/c/280110db1a7d62ad635b103bafc3ae96e8bef75c |
| https://git.kernel.org/stable/c/89eecabe6a47403237f45aafd7d24f93cb973653 |
| https://git.kernel.org/stable/c/f06e0cd01eab954bd5f2190c9faa79bb5357e05b |
| https://git.kernel.org/stable/c/7692700ac818866d138a8de555130a6e70e6ac16 |
| https://git.kernel.org/stable/c/ae6c8b6e5d5628df1c475c0a8fca1465e205c95b |
| https://git.kernel.org/stable/c/a89ff5f5cc64b9fe7a992cf56988fd36f56ca82a |
