| 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-2022-49208: RDMA/irdma: Prevent some integer underflows |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| RDMA/irdma: Prevent some integer underflows |
| |
| My static checker complains that: |
| |
| drivers/infiniband/hw/irdma/ctrl.c:3605 irdma_sc_ceq_init() |
| warn: can subtract underflow 'info->dev->hmc_fpm_misc.max_ceqs'? |
| |
| It appears that "info->dev->hmc_fpm_misc.max_ceqs" comes from the firmware |
| in irdma_sc_parse_fpm_query_buf() so, yes, there is a chance that it could |
| be zero. Even if we trust the firmware, it's easy enough to change the |
| condition just as a hardenning measure. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49208 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.14 with commit 3f49d684256963d3f27dfb9d9ff228e2255be78d and fixed in 5.15.33 with commit d52dab6e03550f9c97121b0c11c0a3ed78ee76a4 |
| Issue introduced in 5.14 with commit 3f49d684256963d3f27dfb9d9ff228e2255be78d and fixed in 5.16.19 with commit f21056f15bbeacab7b4b87af232f5599d1f2bff1 |
| Issue introduced in 5.14 with commit 3f49d684256963d3f27dfb9d9ff228e2255be78d and fixed in 5.17.2 with commit 7340c3675d7ac946f4019b84cd7c64ed542dfe4c |
| Issue introduced in 5.14 with commit 3f49d684256963d3f27dfb9d9ff228e2255be78d and fixed in 5.18 with commit 6f6dbb819dfc1a35bcb8b709b5c83a3ea8beff75 |
| |
| 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-2022-49208 |
| 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/irdma/ctrl.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/d52dab6e03550f9c97121b0c11c0a3ed78ee76a4 |
| https://git.kernel.org/stable/c/f21056f15bbeacab7b4b87af232f5599d1f2bff1 |
| https://git.kernel.org/stable/c/7340c3675d7ac946f4019b84cd7c64ed542dfe4c |
| https://git.kernel.org/stable/c/6f6dbb819dfc1a35bcb8b709b5c83a3ea8beff75 |
