| 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-2022-49061: net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link |
| |
| When using a fixed-link, the altr_tse_pcs driver crashes |
| due to null-pointer dereference as no phy_device is provided to |
| tse_pcs_fix_mac_speed function. Fix this by adding a check for |
| phy_dev before calling the tse_pcs_fix_mac_speed() function. |
| |
| Also clean up the tse_pcs_fix_mac_speed function a bit. There is |
| no need to check for splitter_base and sgmii_adapter_base |
| because the driver will fail if these 2 variables are not |
| derived from the device tree. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49061 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.8 with commit fb3bbdb859891e6bc27fd1afb3a07319f82c2ee4 and fixed in 5.4.190 with commit 7e59fdf9547c4f948d1d917ec7ffa5fb5ac53bdb |
| Issue introduced in 4.8 with commit fb3bbdb859891e6bc27fd1afb3a07319f82c2ee4 and fixed in 5.10.112 with commit 08d5e3e954537931c8da7428034808d202e98299 |
| Issue introduced in 4.8 with commit fb3bbdb859891e6bc27fd1afb3a07319f82c2ee4 and fixed in 5.15.35 with commit 62a48383ebe2e159fd68425dd3e16d4c6bd6599a |
| Issue introduced in 4.8 with commit fb3bbdb859891e6bc27fd1afb3a07319f82c2ee4 and fixed in 5.17.4 with commit 6c020f05253df04c3480b586fe188a3582740049 |
| Issue introduced in 4.8 with commit fb3bbdb859891e6bc27fd1afb3a07319f82c2ee4 and fixed in 5.18 with commit a6aaa00324240967272b451bfa772547bd576ee6 |
| |
| 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-2022-49061 |
| 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/stmicro/stmmac/altr_tse_pcs.c |
| drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.h |
| drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.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/7e59fdf9547c4f948d1d917ec7ffa5fb5ac53bdb |
| https://git.kernel.org/stable/c/08d5e3e954537931c8da7428034808d202e98299 |
| https://git.kernel.org/stable/c/62a48383ebe2e159fd68425dd3e16d4c6bd6599a |
| https://git.kernel.org/stable/c/6c020f05253df04c3480b586fe188a3582740049 |
| https://git.kernel.org/stable/c/a6aaa00324240967272b451bfa772547bd576ee6 |
