| 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-2024-50157: RDMA/bnxt_re: Avoid CPU lockups due fifo occupancy check loop |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| RDMA/bnxt_re: Avoid CPU lockups due fifo occupancy check loop |
| |
| Driver waits indefinitely for the fifo occupancy to go below a threshold |
| as soon as the pacing interrupt is received. This can cause soft lockup on |
| one of the processors, if the rate of DB is very high. |
| |
| Add a loop count for FPGA and exit the __wait_for_fifo_occupancy_below_th |
| if the loop is taking more time. Pacing will be continuing until the |
| occupancy is below the threshold. This is ensured by the checks in |
| bnxt_re_pacing_timer_exp and further scheduling the work for pacing based |
| on the fifo occupancy. |
| |
| The Linux kernel CVE team has assigned CVE-2024-50157 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.6 with commit 2ad4e6303a6d7518632739eaf67821a3553db1bd and fixed in 6.6.75 with commit 7998e7efd1d557af118ac96f48ebc569b929b555 |
| Issue introduced in 6.6 with commit 2ad4e6303a6d7518632739eaf67821a3553db1bd and fixed in 6.11.6 with commit 2fb6b2e82413e401b72dfeacd7a60416fcfc5b41 |
| Issue introduced in 6.6 with commit 2ad4e6303a6d7518632739eaf67821a3553db1bd and fixed in 6.12 with commit 8be3e5b0c96beeefe9d5486b96575d104d3e7d17 |
| |
| 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-2024-50157 |
| 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/bnxt_re/main.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/7998e7efd1d557af118ac96f48ebc569b929b555 |
| https://git.kernel.org/stable/c/2fb6b2e82413e401b72dfeacd7a60416fcfc5b41 |
| https://git.kernel.org/stable/c/8be3e5b0c96beeefe9d5486b96575d104d3e7d17 |
