| 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-2022-49076: RDMA/hfi1: Fix use-after-free bug for mm struct |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| RDMA/hfi1: Fix use-after-free bug for mm struct |
| |
| Under certain conditions, such as MPI_Abort, the hfi1 cleanup code may |
| represent the last reference held on the task mm. |
| hfi1_mmu_rb_unregister() then drops the last reference and the mm is freed |
| before the final use in hfi1_release_user_pages(). A new task may |
| allocate the mm structure while it is still being used, resulting in |
| problems. One manifestation is corruption of the mmap_sem counter leading |
| to a hang in down_write(). Another is corruption of an mm struct that is |
| in use by another task. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49076 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10 with commit 3d2a9d642512c21a12d19b9250e7a835dcb41a79 and fixed in 5.10.111 with commit 5f54364ff6cfcd14cddf5441c4a490bb28dd69f7 |
| Issue introduced in 5.10 with commit 3d2a9d642512c21a12d19b9250e7a835dcb41a79 and fixed in 5.15.34 with commit 9ca11bd8222a612de0d2f54d050bfcf61ae2883f |
| Issue introduced in 5.10 with commit 3d2a9d642512c21a12d19b9250e7a835dcb41a79 and fixed in 5.16.20 with commit 0b7186d657ee55e2cdefae498f07d5c1961e8023 |
| Issue introduced in 5.10 with commit 3d2a9d642512c21a12d19b9250e7a835dcb41a79 and fixed in 5.17.3 with commit 5a9a1b24ddb510715f8f621263938186579a965c |
| Issue introduced in 5.10 with commit 3d2a9d642512c21a12d19b9250e7a835dcb41a79 and fixed in 5.18 with commit 2bbac98d0930e8161b1957dc0ec99de39ade1b3c |
| Issue introduced in 5.9.12 with commit 5732f83596f8a573f2cde814cc76a54e1a8995c7 |
| |
| 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-2022-49076 |
| 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/infiniband/hw/hfi1/mmu_rb.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/5f54364ff6cfcd14cddf5441c4a490bb28dd69f7 |
| https://git.kernel.org/stable/c/9ca11bd8222a612de0d2f54d050bfcf61ae2883f |
| https://git.kernel.org/stable/c/0b7186d657ee55e2cdefae498f07d5c1961e8023 |
| https://git.kernel.org/stable/c/5a9a1b24ddb510715f8f621263938186579a965c |
| https://git.kernel.org/stable/c/2bbac98d0930e8161b1957dc0ec99de39ade1b3c |
