| 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-2024-50145: octeon_ep: Add SKB allocation failures handling in __octep_oq_process_rx() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| octeon_ep: Add SKB allocation failures handling in __octep_oq_process_rx() |
| |
| build_skb() returns NULL in case of a memory allocation failure so handle |
| it inside __octep_oq_process_rx() to avoid NULL pointer dereference. |
| |
| __octep_oq_process_rx() is called during NAPI polling by the driver. If |
| skb allocation fails, keep on pulling packets out of the Rx DMA queue: we |
| shouldn't break the polling immediately and thus falsely indicate to the |
| octep_napi_poll() that the Rx pressure is going down. As there is no |
| associated skb in this case, don't process the packets and don't push them |
| up the network stack - they are skipped. |
| |
| Helper function is implemented to unmmap/flush all the fragment buffers |
| used by the dropped packet. 'alloc_failures' counter is incremented to |
| mark the skb allocation error in driver statistics. |
| |
| Found by Linux Verification Center (linuxtesting.org) with SVACE. |
| |
| The Linux kernel CVE team has assigned CVE-2024-50145 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.19 with commit 37d79d0596062057f588bdbb2ebad5455a43d353 and fixed in 6.1.115 with commit 09ce491112bbf0b866e2638d3e961c1c73d1f00b |
| Issue introduced in 5.19 with commit 37d79d0596062057f588bdbb2ebad5455a43d353 and fixed in 6.6.59 with commit c2d2dc4f88bb3cfc4f3cc320fd3ff51b0ae5b0ea |
| Issue introduced in 5.19 with commit 37d79d0596062057f588bdbb2ebad5455a43d353 and fixed in 6.11.6 with commit 2dedcb6f99f4c1a11944e7cc35dbeb9b18a5cbac |
| Issue introduced in 5.19 with commit 37d79d0596062057f588bdbb2ebad5455a43d353 and fixed in 6.12 with commit eb592008f79be52ccef88cd9a5249b3fc0367278 |
| |
| 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-2024-50145 |
| 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/octeon_ep/octep_rx.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/09ce491112bbf0b866e2638d3e961c1c73d1f00b |
| https://git.kernel.org/stable/c/c2d2dc4f88bb3cfc4f3cc320fd3ff51b0ae5b0ea |
| https://git.kernel.org/stable/c/2dedcb6f99f4c1a11944e7cc35dbeb9b18a5cbac |
| https://git.kernel.org/stable/c/eb592008f79be52ccef88cd9a5249b3fc0367278 |
