| 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-2021-47537: octeontx2-af: Fix a memleak bug in rvu_mbox_init() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| octeontx2-af: Fix a memleak bug in rvu_mbox_init() |
| |
| In rvu_mbox_init(), mbox_regions is not freed or passed out |
| under the switch-default region, which could lead to a memory leak. |
| |
| Fix this bug by changing 'return err' to 'goto free_regions'. |
| |
| This bug was found by a static analyzer. The analysis employs |
| differential checking to identify inconsistent security operations |
| (e.g., checks or kfrees) between two code paths and confirms that the |
| inconsistent operations are not recovered in the current function or |
| the callers, so they constitute bugs. |
| |
| Note that, as a bug found by static analysis, it can be a false |
| positive or hard to trigger. Multiple researchers have cross-reviewed |
| the bug. |
| |
| Builds with CONFIG_OCTEONTX2_AF=y show no new warnings, |
| and our static analyzer no longer warns about this code. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47537 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.12 with commit 98c5611163603d3d8012b1bf64ab48fd932cf734 and fixed in 5.15.7 with commit 1c0ddef45b7e3dbe3ed073695d20faa572b7056a |
| Issue introduced in 5.12 with commit 98c5611163603d3d8012b1bf64ab48fd932cf734 and fixed in 5.16 with commit e07a097b4986afb8f925d0bb32612e1d3e88ce15 |
| |
| 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-2021-47537 |
| 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/net/ethernet/marvell/octeontx2/af/rvu.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/1c0ddef45b7e3dbe3ed073695d20faa572b7056a |
| https://git.kernel.org/stable/c/e07a097b4986afb8f925d0bb32612e1d3e88ce15 |
