| 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-2021-47166: NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce() |
| |
| The value of mirror->pg_bytes_written should only be updated after a |
| successful attempt to flush out the requests on the list. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47166 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.0 with commit a7d42ddb3099727f58366fa006f850a219cce6c8 and fixed in 4.4.271 with commit e8b8418ce14ae66ee55179901edd12191ab06a9e |
| Issue introduced in 4.0 with commit a7d42ddb3099727f58366fa006f850a219cce6c8 and fixed in 4.9.271 with commit b291baae24f876acd5a5dd57d0bb2bbac8a68b0c |
| Issue introduced in 4.0 with commit a7d42ddb3099727f58366fa006f850a219cce6c8 and fixed in 4.14.235 with commit c757c1f1e65d89429db1409429436cf40d47c008 |
| Issue introduced in 4.0 with commit a7d42ddb3099727f58366fa006f850a219cce6c8 and fixed in 4.19.193 with commit 40f139a6d50c232c0d1fd1c5e65a845c62db0ede |
| Issue introduced in 4.0 with commit a7d42ddb3099727f58366fa006f850a219cce6c8 and fixed in 5.4.124 with commit 785917316b25685c9b3a2a88f933139f2de75e33 |
| Issue introduced in 4.0 with commit a7d42ddb3099727f58366fa006f850a219cce6c8 and fixed in 5.10.42 with commit 7087db95c0a06ab201b8ebfac6a7ec1e34257997 |
| Issue introduced in 4.0 with commit a7d42ddb3099727f58366fa006f850a219cce6c8 and fixed in 5.12.9 with commit 2fe1cac336b55a1f79e603e9ce3552c3623e90eb |
| Issue introduced in 4.0 with commit a7d42ddb3099727f58366fa006f850a219cce6c8 and fixed in 5.13 with commit 0d0ea309357dea0d85a82815f02157eb7fcda39f |
| |
| 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-2021-47166 |
| 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/nfs/pagelist.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/e8b8418ce14ae66ee55179901edd12191ab06a9e |
| https://git.kernel.org/stable/c/b291baae24f876acd5a5dd57d0bb2bbac8a68b0c |
| https://git.kernel.org/stable/c/c757c1f1e65d89429db1409429436cf40d47c008 |
| https://git.kernel.org/stable/c/40f139a6d50c232c0d1fd1c5e65a845c62db0ede |
| https://git.kernel.org/stable/c/785917316b25685c9b3a2a88f933139f2de75e33 |
| https://git.kernel.org/stable/c/7087db95c0a06ab201b8ebfac6a7ec1e34257997 |
| https://git.kernel.org/stable/c/2fe1cac336b55a1f79e603e9ce3552c3623e90eb |
| https://git.kernel.org/stable/c/0d0ea309357dea0d85a82815f02157eb7fcda39f |
